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A new species of Hechtia (Bromeliaceae) from southwestern Tamaulipas, Mexico

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A new species of Hechtia from the Mexican State of Tamaulipas is herein proposed as new: Hechtia hernandezsandovalii, which is known only from the municipality of Villa de Miquihuana in the southwestern portion of the state. The new species is easily recognized by the following combination of characters: its white cotton-like indument (turning brownish with age) on the branches, rachis, and peduncle of both staminate and pistillate inflorescences. The new taxon is compared with H. glomerata, a species morphologically similar.
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PHYTOTAXA
ISSN 1179-3155 (print edition)
ISSN 1179-3163 (online edition)
Copyright © 2013 Magnolia Press
Phytotaxa 112 (2): 33–42 (2013)
www.mapress.com/phytotaxa/Article
http://dx.doi.org/10.11646/phytotaxa.112.2.1
A new species of Hechtia (Bromeliaceae) from southwestern Tamaulipas, Mexico
IVÓN RAMÍREZ MORILLO1,3, CARLOS F. JIMÉNEZ NAH1 & JACINTO TREVIÑO CARREÓN2
1Centro de Investigación Científica de Yucatán, A. C., Unidad de Recursos Naturales-Herbario CICY, Calle 43 # 130. Colonia
Chuburná de Hidalgo, Mérida, Yucatán 97200, México.
2Universidad Autónoma de Tamaulipas, Facultad de Ingeniería y Ciencias, Centro Universitario Adolfo López Mateos, Cd. Victoria,
Tamaulipas 87149, México.
3 ramirez@cicy.mx
Abstract
A new species of Hechtia from the Mexican State of Tamaulipas is herein proposed as new: Hechtia hernandez-
sandovalii, which is known only from the municipality of Villa de Miquihuana in the southwestern portion of the state.
The new species is easily recognized by the following combination of characters: its white cotton-like indument (turning
brownish with age) on the branches, rachis, and peduncle of both staminate and pistillate inflorescences. The new taxon
is compared with H. glomerata, a species morphologically similar.
Resumen
Una nueva especie de Hechtia Klotszch del estado mexicano de Tamaulipas se propone como nueva: Hechtia hernandez-
sandovalii, la cual se conoce solo del Municipio de Villa de Miquihuana en la porción suroeste del estado. La nueva
especie se reconoce fácilmente por la siguiente combinación de caracteres: inflorescencia, ramas, pedúnculo y raquis
cubiertas por un indumento blanco parecido al algodón, que se torna café con el tiempo. El nuevo taxón se compara con
H. glomerata, especie morfológicamente similar.
Key words: Dioecy, endemism, Hechtia glomerata, IUCN, lateral inflorescence
Introduction
Hechtia Klotzsch (1835: 401) members range from Southern Texas (Big Bend National Park) to northern
Nicaragua in Central America (Departments of Nueva Segovia and Jinotega), occurring on an area defined as
Megamexico III by Rzedowski (1991). Most of the species of the genus are in Mexico (94% of them) and are
endemic to it; Oaxaca houses ca. 20 species (Espejo et al., 2007), but species numbers decrease toward
northern Mexico, with only 2-3 species reported for the northern states of Baja California: H. montana
Brandegee (1889: 9) and H. gayorum Lenz (1995: 59), and only three species reported from Tamaulipas: H.
epigyna Harms (1935: 531–532) described from Jaumave but recently reported from Hidalgo as well (Espejo
et al., 2010b), H. mexicana Smith (1935: 149) described from Sierra del Abra in San Luis Potosí, and H.
glomerata Zuccarini (1840:240). This last binomial has been applied to several populations from Tamaulipas
in Mexico to Honduras in Central America but the status of this species was recently clarified by Jiménez
(2011) and Espejo et al. (2010a) currently remaining restricted to the Mexican states of Guanajuato, Hidalgo,
Querétaro, and San Luis Potosí. Espejo et al. (2004) referred Hechtia populations from several municipalities
in Tamaulipas to H. glomerata. Among these, some actually represent a new entity from the Municipio de
Miquihuana, herein described as a new species and henceforth compared with H. glomerata.
RAMÍREZ ET AL.34 Phytotaxa 112 (2) © 2013 Magnolia Press
Materials and methods
Herbarium specimens were prepared from plants collected in Tamaulipas from 2009 through 2012.
Morphological variation of rosette features at population level was evaluated in the field. The complete
material was cross examined to verify its status as a new species against all species recorded from Tamaulipas
and neighboring states with the information on the protologues, including type material or images of them.
Species assessed include Hechtia epigyna Harms, H. glomerata Zucc., and H. mexicana.
We compared different structures ranging from growth habit, through rosette features, inflorescence
origin and architecture, flower shapes, color, etc. across species with close geographical distributions. We
consider this approach very useful for people trying to identify populations from the same general area. In
performing this exercise, we aim at the use of characters preserved in herbarium specimens as well as those
only observed in living plants. To accomplish this, besides relevant description, we provide images and
drawings.
The sequence of the description of the fertile structures of new entity is as follows: first the staminate
inflorescence, then the pistillate inflorescence followed by fruit characteristics.
Taxonomy
Hechtia hernandez-sandovalii I. Ramírez, C. F. Jiménez & Treviño, sp. nov. (Fig. 1 (A,C,E,F), 2, 3).
Species similar to Hechtia glomerata Zucc. in its acaule rosettes with narrowly triangular blades, glabrous above,
densely white lepidote below, lateral inflorescence, and staminate and pistillate flowers with white petals. However,
H. hernandez-sandovalii presents branches of the inflorescence densely covered with a initially white indumentum
that turns brownish with age and flowers totally immersed in it (vs. thin indumentums and flowers not immersed in
it), rosettes taller than wide, leaves erect, falcate, laminae green, never developing red color (vs. rosette ellipsoid,
wider than tall, leaves horizontally extended, apices deflexed, leaves green, shiny above, usually develop red color
in H. glomerata); foliar sheaths shorter (2.5–3 cm vs. 3–6 cm in H. glomerata); floral parts (floral bracts, petals,
sepals, ovary, anthers, and staminodes) and fruits larger, but seeds smaller in H. hernandez-sandovalii.
TYPE:—MEXICO. Tamaulipas: Municipio de Miquihuana, 17 km al W de Miquihuana camino a Estanque de Los
Walle, 23°62’N, 98°57’–99°06'W, 28 mayo 1986, Hernández & Martínez 1797 (holotype MEXU! (2), isotypes
(QMEX!, TEX-LL, UAT!).
Terrestrial, caespitose, rosetofilous herbs, when blooming 1–1.80 m tall. Rosettes up to 35 cm diameter, taller
than wide, leaves erect, falcate, new rosettes originating at the base of old ones and forming large colonies.
Leaves 25–35 per rosette, succulent, straight and pointing upwards, foliar sheaths transversally oblong, 2.5–3
cm long, (2.6–) 3.7–4.8 cm wide, when dry white-yellowish adaxially and brownish abaxially, sometimes
with a distally darker brown area, glabrous on both surfaces, basally entire, finely dentate close to the lamina;
foliar blades narrowly triangular, acuminate, pungent, 21–39 cm long, 1.3–2.9 cm wide at base, 0.5–1.1 cm
wide on the mid area, green, glabrous to sparsely white lepidote adaxially, white lepidote abaxially, margins
spinose, spines 4–7 mm long, , uncinate, generally retrorse, (0.8–) 1.6–4.4 (–5.1) cm apart, laxly arranged
toward the apex, reddish. Inflorescence lateral, erect.
Staminate inflorescence a 2-divided panicle, 1.15–1.53 m long; peduncle 58–61 cm long, 0.9–1.3 cm
diameter, base flattened, light brown, sparsely white lepidote but sometimes glabrous, much longer than
leaves; peduncle bracts triangular to triangular-ovate, acuminate, 2.3–6.2 cm long, 1–2.7 cm wide, brownish,
sparsely lepidote, finely and laxly denticulate at base, entire towards the apex, strongly nerved, longer than
internodes at the base, shorter towards the apex; main axis 57–92 cm long, 0.4–0.8 cm diameter, cylindrical,
sometimes slightly sinuose, light brown, sparsely lepidote, soon glabrous; its internodes 1.4–4.8 cm long,
shorter towards the base; primary bracts triangular, acute, acuminate, 1–4 cm long, 0.6–1.2 cm wide,
brownish, sparsely lepidote, entire, strongly nerved; primary branches ca. 30 per inflorescence, 2–8.3 cm
long, 0.8–1.3 cm diameter, sessile, ascending or appressed to main axis, ca. 8–50 (–70) flowers per branch;
Phytotaxa 112 (2) © 2013 Magnolia Press 35
A NEW SPECIES OF HECHTIA (BROMELIACEAE)
FIGURE 1. Hechtia hernandez-sandovalii (A, C, E, F). A. Plant in habit. C. Young staminate inflorescence showing white
indumentum. E. Staminate branch. F. Pistillate branch. Hechtia glomerata (B, D). B . Plant in habit, see rosette shape and leaf color. D.
Staminate (above) and pistillate (below) flowers. Photographs A, B, C, D by Ivón Ramirez; E and F by Jacinto Treviño Carreón.
RAMÍREZ ET AL.36 Phytotaxa 112 (2) © 2013 Magnolia Press
FIGURE 2. Hechtia hernandez-sandovalii. Pistillate plant. A. Floral bract. B. Sepals. C. Petals. D. Ovary with sessile stigma E.
Longitudinal section of the ovary showing details of ovules. F. Staminode. (Based on C. Jiménez et al. 27 (CICY)). Illustration by
Carlos Jiménez.
secondary branches 1.3–2.5 cm long, ca. 10–20 flowers on each branch; floral bract long-ovate, short-
acuminate, 6.3–8.2 mm long, 4–4.4 mm wide, brownish, erose, densely white lepidote, 7-nerved, exceeding
sepals and petals; flowers densely clustered and covered by a dense white indumentums which is cotton like
and becomes brownish with age, 6.5–7.5 mm long, 3–3.2 mm diameter, sessile; sepals connate by ½ of their
Phytotaxa 112 (2) © 2013 Magnolia Press 37
A NEW SPECIES OF HECHTIA (BROMELIACEAE)
length, oblong, acute, 4.4–5.3 mm long, 2.3–2.5 mm wide, brownish, erose, densely white-lepidote, 5-nerved,
slightly carinate, shorter than petals; petals free, obovate, rounded, 5.5–6 mm long, 2.8–3 mm wide, entire,
white, densely white-lepidote, 7-nerved; stamens erect, adnate to the petals and pistillode base, barely
protruding at anthesis, 3.2–4 mm long; filaments narrowly triangular, 2.9–3.5 mm long, 0.7 mm wide, white;
anthers ca. 2.2 mm long, ca. 0.8 mm wide; pistillode conical, 1.4 mm long including vestigial stigmatic lobes,
ca. 1.2 mm diameter, greenish to almost white; vestigial stigmatic lobes narrow, erect, 0.7 mm long.
FIGURE 3. Hechtia hernandez-sandovalii. Staminate plant. A. Floral bract. B. Sepals. C. Petals. D. Pistillode. E. Stamen. (Based on
C. Jiménez et al. 27a (CICY)). Illustration by Carlos Jiménez.
RAMÍREZ ET AL.38 Phytotaxa 112 (2) © 2013 Magnolia Press
Pistillate inflorescence a 1–2 divided panicle, 0.73–1.30 m long; peduncle 37–75 cm long, 0.5–0.9 cm
diameter, base flattened, reddish or brownish, sparsely white lepidote, soon glabrous, much longer than
leaves; peduncle bracts triangular, acuminate, 1.7–6.3 cm long, 0.7–2.6 cm wide, brownish, sparsely lepidote,
finely and loosely denticulate at base, entire towards the apex, strongly nerved, longer than basal internodes,
equal or shorter on apical ones, its internodes 1.5–2.6 cm long, increasing in length from base to apex; main
axis 27–80 cm long, 0.3–0.4 cm diameter, terete, sometimes sinuous, reddish or brownish, sparsely lepidote,
sometimes glabrous, its internodes 1.5–5.8 cm long; primary bracts triangular, acuminate, 0.9–3 cm long, 0.7–
1 cm wide, brownish, sparsely lepidote, entire, strongly nerved; primary branches 11–13 per inflorescence,
0.9–4.7 cm long, (0.5–) 0.9–1.7 cm diameter; its rachis 0.15–0.2 cm diameter, basal portion of the branch
(sterile portion), ca. 1–3 (–12) mm, flattened at base, ascending or appressed to the main axis, ca. 6–30
flowers on primary branches; secondary branches 1–1.5 cm long, with ca. 4–10 flowers each ; floral bracts
transversely oblong to wide elliptic, short acuminate, 8.7–9.4 mm long, 5.8–6 mm wide, brownish, margin
erose, densely white lepidote, 7-nerved, exceeding sepals and petals; flowers densely clustered and covered
by a dense white indumentums which is cotton like and becomes brownish with age, 7–7.5 mm long, 4–4.6
mm diameter, sessile; sepals connate by ½ of their length, ovate, acute, 6.2–6.5 mm long, 4–4.2 mm wide,
brownish, margin erose, densely white lepidote, 5-nerved, carinate, sometimes as long as the petals; petals
free, ovate, acute, 6.5–6.9 mm long, 3.8–4.4 mm wide, white, entire, densely white lepidote, 7-nerved;
staminodes narrowly triangular, 2.6–3.8 mm long, 0.5–0.7 mm wide at base; vestigial anthers triangular;
filaments adnate to the base of petals and ovary, white; ovary superior, ovoid, 6 mm long, 3 mm diameter,
white or greenish; stigmatic lobes erect, ca. 1.5–1.8 mm long; placentation central, ovules ovoid, covered by a
membranous, transparent wing, 0.8 mm long, 0.6 mm de diameter including the wing. Fruits ellipsoid to wide
ellipsoid, 7.2–8 mm long, 4–5.2 mm wide, brown, sepals, petals, staminodes, and stigmatic lobes persistent
remaining on the fruit; seeds fusiform, 3.3–3.9 mm long, 1–1.4 mm wide, brown with two apical wings; apical
wing 0.3–0.5 mm long, basal wing 0.4–0.9 mm long.
Distribution and habitat:—Hechtia hernandez-sandovalii has been so far only collected in a very
restricted area in the extreme southwestern portion of Tamaulipas, Municipio Miquihuana, at the localities of
La Peña, Estanque de Los Walle, Estanque Eguia, Servando Canales, La Perdida, San José del Llano, and
Miquihuana (figure 4). The new species is an important component of what has been denominated
“rosetofilous acaulescent thickets of Hechtia” (Treviño-Carreón & Valiente-Banuet, 2005), on extensive
limestone hills or rocky exposed areas. Also but less often, the new species can be found inhabiting the lower
stratum of pine forest and rosetofilous caulescent thickets of Dasylirion miquihuanense Bogler (1998: 76) and
D. qudrangulatum S. Watson (1879: 250). In the plains and plateaus of these same sites, Hechtia hernandez-
sandovalii is often found associated with Agave lechuguilla Torrey (1858: 213) forming a plant association
called “Agave-Hechtia acaulescent rosetofilous shrubland”. Rosetofilous shrublands are interspaced with
rosetofilous forests of Yucca filifera Chabaud (1876: 432) and Y. carnerosana (Trelease 1902: 118) McKelvey
(1938: 24), as well as microphilous shrublands of Larrea tridentata (Candolle 1824:706) Coville (1893: 75).
The distribution area is located between 1800 to 2200 m above sea level, with rains during summer (July to
September) ranging from 500 to 700 mm, with temperatures ranging from -4°C and 41°C. The new species
blooms from May to June, producing fruits in the following three months, which remain on the plant for a
year when they open and free the seeds.
Other species usually found growing with Hechtia hernandez-sandovalii are Agave striata Zucc.
(Karwinsky & Zuccarini, 1833: 678), Celtis pallida Torrey (1859: 250), Cylindropuntia leptocaulis (Candolle
1828b: 118) F.M. Knuth (Backeberg & Knuth 1935:122), Euphorbia antisiphylitica Zuccarini (1832: 292),
Jatropha dioica Sessé in Cervantes (1794: 4), Koeberlinia spinosa Zuccarini (1832: 359), Lippia graveolens
Kunth (1817 “1818“: 266), Opuntia imbricata (Haworth 1819: 70) Candolle (1828a: 278), Opuntia
stenopetala Engelmann (1856: 289), Pinus cembroides Zuccarini (1832: 392), Pinus nelsonii Shaw (1904:
122), Prosopis glandulosa Torrey (1827: 192), among others.
Additional specimens examined (paratypes):—MEXICO. Tamaulipas: Mun. Palmillas, 8.5 al noroeste
de Palmillas [23°22’06’’N, 99°30’53’’O], 1550 m snm, 7 Julio 1985, P. Hiriart, V. Juárez y R. Molczadzki 937
Phytotaxa 112 (2) © 2013 Magnolia Press 39
A NEW SPECIES OF HECHTIA (BROMELIACEAE)
fruits (MEXU!, UAT!); 926 (MEXU!); Mun. Miquihuana, 1 km delante de la Perdida, [23°33’18’’N,
99°51’58’’O], 1850 m snm, 4 Junio 1986, H. Sánchez-Mejorada 3648 (MEXU! (2)); 17 km al O de
Miquihuana camino a Estanque de Los Walle, 23°62' N, 99°06' W, 28 Mayo 1986, L. Hernández & M.
Martínez 1799 (MEXU! (2), TEX-LL!, UAT!); 1.5 km después de la desviación hacia Estanque Los Walle,
23°32’41’’N, 99°53’53’’O, 1461 m snm, 12 Julio 2012, C. Jiménez, J. Treviño, A. de León, O. López y T.
Hernández 27 (CICY!, IEB!, US!), C. Jiménez, J. Treviño, A. de León, O. López y T. Hernández 27a
(CICY!, HGOM!, IEB!, US!, XAL!); 5.5 km al O de Miquihuana, por la carretera a San José del Llano, 2
km antes del entronque de la Perdida, 23°32’34.3’’N, 99°50’31.5’’W, 1592 m, 12 Junio 2009, I. Ramírez, J.
Treviño & S. Terán Treviño 1610 (CICY!); 1610a fruits (CICY!).
FIGURE 4. Geographical distribution of Hechtia hernandez-sandovalii (black triangles) and Hechtia glomerata (black circles).
Etymology:—We dedicate this species to Luis G. Hernández Sandoval who collected the type material of
this new species.
Discussion:—The new species along with additional ca. 10 taxa, are part of a group defined as the
Hechtia glomerata Zucc. complex by Jiménez (2011) who characterized it by the presence of lateral,
paniculate inflorescences, 1–3 divided, peduncle flattened at its base, a white indumentum covering all the
inflorescences and its parts in both staminate and pistillate plants. Flowers on species on this complex are
generally grouped in glomerules or sometimes laxly disposed along the branches, sessile to subsessile,
pistillate and staminate flowers with white petals, those staminate with white filaments, green to yellow-
greenish anthers, those pistillate with white stigma, and fruits with fusiform seeds. Phylogenetic analysis are
on their way but preliminary results with morphological characters and sequences of the plastid region rpl32
for 38 taxa of Hechtia suggest the monophyly of the complex (I. Ramírez et al., unpublished).
The new species resembles Hechtia glomerata Zucc., a species also characterized by the presence of
lateral inflorescences, but with rosettes producing stolons, leaves horizontally extended with deflexed apices,
producing open rosettes that are wider than tall, foliar laminae with adaxial surface shiny and usually coloring
red. Its pistillate branches are condensed, glomerule like, but staminate branches are elongated, and both of
RAMÍREZ ET AL.40 Phytotaxa 112 (2) © 2013 Magnolia Press
them covered by a thin layer of white indumentums and flowers present white petals. On the other hand,
rosettes of Hechtia hernandez-sandovalii do not produce stolons, their leaves are erect, falcate, producing
rosettes that are taller than wide, with foliar laminae green without developing red color. Its pistillate as well
as staminate branches are cylindrical and these covered by a dense white indumentums which is cotton like
and becomes brownish with age.
A more detailed study of floral features shows that foliar sheaths on the new taxon are shorter (2.5–3 cm
vs. 3–6 cm in H. glomerata), its floral parts larger (floral bracts, petals, sepals, ovary, anthers, and
staminodes), as well as larger fruits but contrastingly smaller seeds in H. hernandez-sandovalii. Growth habit
also differs between these species: H. hernandez-sandovalii form circular colonies of tens of rosettes. New
ones are produced on the periphery with central, old ones gradually dying (and becoming black when
eventually burned), making the colony acquire the aspect of a "fairy ring". On the other hand, rosettes of H.
glomerata form small colonies of few rosettes, usually developing stolons, but never forming a circular
colony on a shape of a fairy ring, with and all rosettes remaining alive.
The indumentum density in the new taxon varies from populations at high elevations (ca. 1800 m, e.j.
locality La Peña) to slighter thinner at elevations below 1800 m. We have under cultivation representatives of
several populations of Hechtia glomerata spanning the altitudinal range of the species and the indumentum
density in the inflorescences is not affected by changes of elevation brought about by this common garden
experiment, thus supporting the notion that this character is not affected by elevation differences within the
species.
IUCN Conservation assessment:IUCN Conservation assessment:—VU. Hechtia hernandez-
sandovalii meets criteria D2 of the IUCN (2001). The species is known from an area of less than 2 km2 within
which it occurs only at a handful of small sites. Albeit local populations of the species can be rich in
individuals and are often inaccessible, they are widely dispersed and isolated on the slopes and tops of small
hills.
MER Conservation assessment:MER Conservation assessment:—A (“Amenazada”, “threatened”).
Hechtia hernandez-sandovalii is known from an area of smaller that 0.2% of the Mexican territory. After
assessing all the criteria of this method, and based upon the relevant factors established in the preceding
paragraphs, H. hernandez-sandovalii scores 12 points, which places it in the mentioned category
(SEMARNAT, 2002).
TABLE 1. Main differences between Hechtia glomerata Zucc. and H. hernandez-sandovalii.
Feature H. glomerata H. hernandez-sandovalii
Rosette features Leaves horizontally extended with apices
deflexed, green, may develop red color;
rosette ellipsoid, wider than tall
Leaves erect, apices erect; falcate, green,
never develop red color; rosettes taller than
wide
Foliar sheaths 3–6 cm long 2.5–3 cm long
Floral bract (staminate flower) 4–5 mm long, as long as the petals 6.3–8.2 mm long, longer than the petals
Petals (staminate flowers) 3.5–4 mm long, ovate to wide-elliptical 4.4–5.3 mm long, oblong
Floral bract (pistillate flower) Triangular-ovate to triangular, 4.5–6 mm
long, equal to the petals Transversely oblong, 8.7–9.4 mm long,
longer than the petals
Sepals (pistillate flower) 4.2–6 mm long 6.2–6.5 mm long
Ovary Ellipsoid to oblong, ca. 5 mm long Ovoid, 6 mm long
Anthers Ca. 1 mm long Ca. 2.2 mm long
Staminodes Ca. 2 mm long, no vestigial anthers 2.6–3.8 mm long, with vestigial anthers
Fruit Ovoid Ellipsoid
Seeds 5.2–7.2 mm long 3.3–3.9 mm long
Phytotaxa 112 (2) © 2013 Magnolia Press 41
A NEW SPECIES OF HECHTIA (BROMELIACEAE)
Acknowledgments
We are indebted to the Elizabeth Bascom Fellowship and to the KLARF Program for the scholarship granted
to the first author that allowed the study of material from several herbaria while at Herbarium MO and
Herbarium K respectively. To the Deutscher Akademischer Austauschdienst (DAAD), Botanischer Garten
und Botanisches Museum Berlin-Dahlem, Freie Universität Berlin and Centro de Investigación Científica de
Yucatán, A. C. for financial support to visit and study the Bromeliaceae collection at Herbarium B during
2011. Our thanks to the curators of the following herbaria: B, BM, CICY, F, GH, IEB, HEID, HGOM, K, LG,
LL, M, MEXU, MICH, MO, NY, OAX, RSA, TEX, UAMIZ, UAT, UC, US, VT, WU, XAL, and Z for
allowing us to study the herbarium material deposited at their herbaria. We would like to thank Tania
Hernández López, Oscar López Hernández, Adán De León Contreras, and Sergio Antonio Terán, for their
help in the field, Paola Marfil for editing the line drawings figures and Germán Carnevali for editing the
English of this paper. Finally, we thank two anonymous reviewers for their comments and suggestions which
improved the clarity and quality of this paper. Field work was supported by Consejo Nacional de Ciencia y
Tecnología’s Project 183281, as well as Proyect UAT10-NAT0101 of Dirección de Estudios de Posgrado e
Investigación de la Universidad Autónoma de Tamaulipas, awarded to the first and third author respectively.
References
Backeberg, C. & Knuth, F.M. (1935) Kaktus-ABC: en haandbog for fagfolk og amatører. København: Gyldendalske
Boghandel - Nordisk Forlag. Copenhagen. 432 pp.
Brandegee, T.S. (1889) New species of plants from Mexico. Erythea 7: 1–12.
Bogler, D.J. (1998) Three New Species of Dasylirion (Nolinaceae) from Mexico and a clarification of the D.
longissimum Complex. Brittonia 50: 71–86.
http://dx.doi.org/10.2307/2807720
Candolle, A.P. de. (1824) Enumeratio Contracta Ordinum, Generum, Specierumque Plantarum. Prodromus Systematis
Naturalis Regni Vegetabilis 1: 1–745.
http://dx.doi.org/10.5962/bhl.title.286
Candolle, A.P. de. (1828a) Enumeratio Contracta Ordinum, Generum, Specierumque Plantarum. Prodromus Systematis
Naturalis Regni Vegetabilis 3: 1–491.
http://dx.doi.org/10.5962/bhl.title.286
Candolle, A.P. de. (1828b) Revue de la Famille des Cactées. Mémoires du Muséum d'Histoire Naturelle 17: 1–472.
Cervantes, V. (1794) Gazeta de literatura de México 3(Suppl.): 1–35
Chabaud, J.B. (1876) Floraison d’ un Yucca filifera. Revue Horticole 48: 1–538
Coville, F.V. (1893) Botany of the Death Valley Expedition. Contributions from the United States National Herbarium 4:
1–363.
Engelmann, G. (1856) Synopsis of the Cactaceae of the territory of the United States. Proceedings of the American
Academy of Arts and Sciences 3: 259–311.
http://dx.doi.org/10.2307/20021194
Espejo-Serna, A., López-Ferrari, A.R., Ramírez-Morillo, I., Holst, B.K., Luther, H. & Till, W. (2004) Checklist of
Mexican Bromeliaceae with notes on species distribution and levels of endemism. Selbyana 25: 33–86.
Espejo-Serna, A., López-Ferrari, A.R., Martínez-Correa, N. & Pulido-Esparza, V.A. (2007) Bromeliad flora of Oaxaca,
Mexico: richness and distribution. Acta Botanica Mexicana 81: 71–147.
Espejo-Serna, A., López-Ferrari, A.R. & Ramírez-Morillo, I.. (2010a), Bromeliaceae, in: Flora del Bajío y de Regiones
Adyacentes 165: 1–145.
Espejo-Serna, A., López-Ferrari, A.R. & Zamudio, S. (2010b) Reencuentro con Hechtia epigyna Harms (Bromeliaceae).
Acta Botanica Mexicana 90: 11–18.
Harms, H. (1935) Bromeliaceae novae V. Notizblatt des Botanischen Gartens und Museums zu Berlin-Dahlem 12: 525–
539.
http://dx.doi.org/10.2307/3994848
Haworth, A.H. (1819) Supplementum plantarum succulentarum. vol. 1, 160 pp.
http://dx.doi.org/10.5962/bhl.title.9314
IUCN. (2001) IUCN Red List Categories and Criteria,Version 3.1. Prepared by the IUCN Species Survival Commission.
IUCN, Gland, Switzerland and Cambridge, UK. http://www.iucn.org/
RAMÍREZ ET AL.42 Phytotaxa 112 (2) © 2013 Magnolia Press
http://dx.doi.org/10.1017/s0030605303250663
Jiménez, C. (2011) Sistemática del complejo Hechtia glomerata Zucc. (Bromeliaceae). Tesis para obtener el grado de
Licenciado en Biología. Instituto Tecnológico de Conkal, Yucatán. 157 pp.
Karwinsky von Karwin, W.F. v. & Zuccarini, J.G. (1833) Fourcroya longaeva. In: Zuccarini, J.G. Über einige Pflanzen
aus de Gatttungen Agave und Fourcroya. Nova Acta Physico-medica Academiae Caesareae Leopoldino-Carolinae
Naturae Curiosorum Exhibentia Ephemerides sive Observationes Historias et Experimenta 16: 659–679, T 49–51.
Klotzsch, J.F. (1835) Eine neue Gattung der Bromeliaceen. Allgemeine Gartenzeitung 3: 401–403.
Kunth, K.C.S. (1817 “1818”) Verbenaceae. Nova Genera et Species Plantarum (quarto ed.) 2: 244–285, t. 130–137.
Lenz, L.W. (1995) A New Species of Hechtia (Bromeliaceae, Pitcairnioideae) from The Cape Region, Baja California
Sur, Mexico. Aliso 14: 59 – 61.
McKelvey, S.D. (1938) Yucca of the Southwestern United States. Arnold Arboretum of Harvard University Vo l. 1.
Jamaica Plain, MA. 150 pp.
Rzedowski, J. (1991) El endemismo en la flora fanerogámica mexicana: una apreciación analítica preliminar. Acta
Botanica. Mexicana 15: 47–64.
SEMARNAT (Secretaría del Medio Ambiente y Recursos Naturales, 2002). Norma Oficial Mexicana NOM-059-ECOL-
2001. Protección ambiental- Especies nativas de México de flora y fauna silvestres. Categorías de riesgo y
especificaciones para su inclusión, exclusión o cambio. Lista de especies en riesgo. Anexo normativo I, método de
evaluación del riesgo de extinción de las especies silvestres en México MER. Diario oficial de la federación,
segunda sección, 6 de marzo de 2002, pp. 1–85.
Shaw, G.R. (1904) The pines of Cuba. Gardeners' Chronicle & Agricultural Gazette ser. 3, 36:1–468.
Smith, L.B. (1935) Studies en Bromeliaceae VI. Proceedings of the American Academy of Arts and Sciences 70:147
220.
http://dx.doi.org/10.2307/20023130
Trelease, W. (1902) The Yucceae. Report of the Missouri Botanical Garden 13: 27–133.
http://dx.doi.org/10.2307/2400121
Treviño–Carreón, J. & Valiente–Banuet, A (2005) La vegetación de Tamaulipas y sus principales asociaciones vegetales.
In: Barrientos Lozano, L., Correa Sandoval, A., Horta Vega, J.V. y García Jiménez, J. (Eds.). Biodiversidad
Tamaulipeca Vol. 1. Instituto Tecnológico de Cd. Victoria, DGEST–SEP, Cd. Victoria, Tam., México, pp. 22–46.
Torrey, J. (1827) Some account of a collection of plants made during a journey to and from the Rocky Mountains in the
summer of 1820, by Edwin P. James, M.D. Assistant Surgeon U.S. Army. Annals of the Lyceum of Natural History
of New York. pp. 161–254.
Torrey, J. (1859) Botany of the Boundary. In William H. Emory. Report on the United States and Mexican Boundary (1):
29–259, pl. I–LXI.
Watson, S. (1879) Revision of the North America Liliaceae. Proceedings of the American Academy of Arts and Sciences
14: 213–303.
http://dx.doi.org/10.2307/25138538
Zuccarini, J.G. (1832) Plantarum novarum vel minus cognitarum. Abhandlungen der Mathematisch-Physikalischen
Classe der Königlich Bayerischen Akademie der Wissenschaften 1: 289–396.
Zuccarini, J.G. (1840) Plantarum cognitarum vel minus cognitarum. Abhandlungen der Mathematisch-Physikalischen
Classe der Königlich Bayerischen Akademie der Wissenschaften 3: 221–251.
... only partially known and the taxonomist´s task here consists in documenting the species to fill up voids of information. In many cases, it has been necessary to epitypify species whose types include only one sex, rendering the species ambiguously diagnosable or publish accounts of species where both sexual morphs as well as fruits are documented and reconciled (Ramírez, Jiménez & Treviño 2013;Ramírez et al. 2014;Ramírez-Morillo et al. 2016). Most modern Hechtia taxonomists have taken up the task to fully document morphologically their new species, as well as providing field observations to understand natural variation (Burt-Utley & Utley 1993;Burt-Utley et al. 2011;Espejo-Serna et al. 2008;Espejo-Serna et al. 2010;García-Ruiz et al. 2014;González-Rocha et al. 2014;López-Ferrari & Espejo-Serna 2013Martínez-Correa et al. 2010;Ramírez-Morillo et al. 2014;Ramírez-Morillo et al. 2015;Ramírez-Morillo et al. 2016). ...
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New species of plants from Mexico
  • T S Brandegee
Brandegee, T.S. (1889) New species of plants from Mexico. Erythea 7: 1-12.