William Cetzal Ix

• Ph.D
• Senior Researcher at Instituto Tecnológico de Chiná, Campeche, México

div class="page" title="Page 1"> Two subspecies of Phragmipedium humboldtii from Guatemala, P. humboldtii subsp. monstruosum and P. humboldtii subsp. triandrum (Orchidaceae, Cypripedioideae) were wrong published in Die Orchidee 66(3), 2015, since the new status of these subspecies are based on an incorrect name for the authorship of P. humboldtii...

To date, there is no comprehensive and updated work on the orchids of Tabasco, despite the existence of several floristic studies that include Orchidaceae and citations of material available in local herbaria. The objective of this research was to collect, update, and expand our knowledge of the Orchidaceae of Tabasco, by compiling a list with all...

Five new records for the orquid flora of Guatemala are reported here. The new records are: Bletia parkinsonii Hook., Govenia bella E.W. Greenw., Govenia matudae E.W. Greenw. & Soto Arenas, Specklinia blancoi (Pupulin) Soto Arenas & Solano, and Trichosalpinx diazii Beutelspacher & Moreno-Molina. In addition, five new synonyms of Brassavola, Encyclia...

A new species of Hechtia (Bromeliaceae, Hechtioideae) from the Mexican State of Jalisco and the physiogeographical province of the Pacific Lowlands, H. santanae, is proposed as new herein. A description is provided, based on male and female plants, including fruits. Specimens of the new species had been identified previously as H. laevis L. B. Smit...

Eugenia fragrans var.? fajardensis was described in 1895 and raised to species status in 1923 as E. fajardensis. In 1925, it was relegated to the synonymy of Anamomis fragrans (Myrcianthes fragrans). Since 2001, we have re-discovered wild plants and herbarium specimens, including a previously unidentified isotype of E. fajardensis, supporting the v...

Background Mangrove ecosystems recognized for their biodiversity and ecosystem services that offer unique opportunities for sustainable livelihoods such as honey production. This study characterizes the beekeeping practices associated with mangroves in Sabancuy, Campeche, Mexico, emphasizing their ecological and economic significance. Methods Thro...

El objetivo de este estudio fue identificar las especies arbóreas forrajeras (EAF) presentes en la península de Yucatán (PY), para documentar sus usos y contribución a la agrobiodiversidad y seguridad alimentaria regional. Con una revisión bibliográfica exhaustiva se integró y actualizó las especies forrajeras presentes y se clasificaron sus usos y...

La biodiversidad en la región sur de la Península de Yucatán es considerablemente amplia, especialmente en Calakmul, donde algunos estudios se han centrado exclusivamente en el análisis de vertebrados terrestres y listados florísticos generales. La Flora Ilustrada se refiere a las plantas y vertebrados presentes en el área de conservación forestal...

Climate Change refers to long-term alterations in temperature, precipitation, wind patterns, and other aspects of the Earth's climate system. These changes are driven largely by human activities, particularly the burning of fossil fuels, deforestation, and certain industrial processes, which release greenhouse gases. Climate Change brings impacts s...

Background Meliponiculture is the breeding of stingless bees (SB) or bees of the Meliponini tribe. In Mexico, this activity was practiced before the arrival of the Spaniards, with the Yucatan Peninsula (YP) (comprising the states of Campeche, Quintana Roo and Yucatan) being the most important region due to its link with the economic, cultural and m...

En la Península de Yucatán (PY) se registra un total de 134 taxa de la familia Orchidaceae que corresponden a 123 especies, una subespecie, una variedad, cuatro híbridos y dos identificados a nivel genérico. A nivel estatal, se registran 111 taxa para Quintana Roo, 94 para Campeche y 44 para Yucatán. Los Jardines Etnobiológicos de Campeche y Quinta...

The Mayan communities in the Yucatán Peninsula (YP) of Mexico have comprehensive knowledge regarding the uses of the local flora and fauna. The objectives of this study have been to integrate the knowledge of fauna uses (FU) to understand the sites studied and determine the diversity of uses, conservation categories and areas of greatest use of fau...

La apicultura es una actividad pecuaria que maneja de manera sostenible los recursos naturales de una región, además provee un ingreso económico principalmente a pequeños productores. En el estado de Guerrero se desconoce la situación actual de la producción apícola. El objetivo del estudio fue analizar la evolución de la producción miel e inventar...

RESUMEN En el estado de Guerrero se desconoce la situación actual de la producción apícola. El objetivo del estudio fue analizar la evolución de producción de miel e inventarios de colmenas en el estado de Guerrero. La investigación se realizó bajo un enfoque exploratorio-descriptivo. Para obtener una tendencia de la producción estatal se realizó u...

The genus Justicia (Acanthaceae) is represented by 12 species in the Mexican portion of the Yucatan Peninsula (MYP), one of which, Justicia cardinalis , is herein proposed as new to science. The new species is known from sub-xerophytic or seasonally dry forests over calcareous, rocky soils along the northern and northeastern regions in the MYP. Thi...

La identificación de flora melífera (FM) en las áreas donde se establecen apiarios es necesaria para los apicultores, debido a que las abejas (Apis mellifera) dependen de estos recursos florales para su alimentación y producción de miel. El objetivo del estudio fue analizar los aspectos socio-ecológicos de la apicultura, considerando los conocimien...

Los humedales son cuerpos de agua que proporcionan múltiples beneficios ecosistémicos para la flora y fauna que los habita, tanto como para humanos, debido a que proveen de agua que abastecen al manto freático. Sin embargo, estos ecosistemas se encuentran fuertemente amenazados por diferentes actividades antropogénicas, los cuales ponen en riesgo s...

Experimentation coincides with the teaching-learning process. According to learning strategies is to be used. The teachers are deplorable in two types of media orientation: teacher–centered strategies and student–centered strategies. The selection of this strategy is closely related to integrating technology and media in a learning process. Specifi...

The Saltwater crocodile (Crocodylus porosus Schneider, 1801), population in India has been relatively stable. They are listed as a Schedule I species in the Wildlife Protection Act of India, which provides them with legal protection. However, several natural and anthropogenic factors are cumulatively putting significant challenges towards the succe...

The Bacalar Lagoon (BL) in Quintana Roo, Mexico; is an area of high interest due to its tourist potential. However, the changes in landuse patterns, urbanization, extensive cattle ranching and rapidly expanding agriculture, have generated negative impacts on areas of adjacent plan communities and wildlife habitats. The objective of this study has t...

Currently agriculture has difficulty keeping up with the demand for food around the world, which has generated a boom in the development of sustainable alternatives for producing food and caring for the environment. Therefore, the present study aims to show a backyard system comprising 50 cm × 50 cm pinewood boxes where maize and peanut were tested...

A comprehensive compilation of all currently recognized orchid species known from Honduras is presented. The checklist includes 604 taxa in 145 genera; 595 species, two subspecies and seven natural hybrids. Orchidaceae represents 7% of the flora of country and continues to be the plant family with the highest number of species in Honduras. The most...

The Yucatan Peninsula, located in southern Mexico, is a central honey-producing region with extraordinary biodiversity of melliferous plants. Approximately 900 plant species have been described as being a source of nectar and pollen for bees and other pollinators. They provide ecosystem services that help to keep plant biodiversity high and mitigat...

Clowesia is a relatively small Neotropical genus of Orchidaceae sister to the much larger Catasetum. A hypothesis of internal relationships was proposed in the 1990s, based solely on morphological and life history characters, which so far has not been robustly tested, which is done herein. The genus encompasses seven formally described species; her...

Objective: To describe the main economic and ecological characteristics in the production of native stingless bees (NSBs) in the Yucatan Peninsula (YP), Mexico. Design/Methodology/Approach: Through the snowball method, an exhaustive search for references about meliponiculture was conducted, using keywords individually or combined, such as meliponic...

Orchids (Orchidaceae) are plants that are highly appreciated by their beautiful flowers worldwide. Moreover, they represent a source of metabolites with applications in medicine and biotechnology. Within the Orchidaceae family, the Laelia genus is a group of orchid species from the Neotropics and is probably one of the most representative genera of...

Gonolobus is reassessed in the Yucatan Peninsula Biotic Province (YPBP). The genus consists of seven taxa in the area: six species and two subspecies. These include a taxon that we propose here as a new species and the treatment of G. yucatanensis as a subspecies of G. stenanthus and the new combination G. stenanthus subsp. yucatanensis is proposed...

Currently, the human population uses antibiotics improperly, and microorganisms develop resistance to them. In addition, the use of antibiotics can sometimes produce serious side effects, such as liver lesions, toxic action on hematopoietic organs, and allergic reactions such as dermatitis. For this reason the search for new natural treatments with...

Objective. To analyze the valuation, use, and preservation of native palms as a non-timber forest product (NTFP) of high economic importance for rural communities in the Yucatán Peninsula, Mexico. Design/methodology/approach: The available literature on palms and their use in the Yucatán Peninsula (YP) was examined using the snowball method. Subseq...

An assessment of the extinction risk of the endemic plants from the Yucatán Peninsula Biotic Province (YPBP) was performed based on distributional data (B criteria of the IUCN) using the GeoCAT tool. The YPBP is located in southeastern Mexico and comprises the Mexican states of Campeche, Quintana Roo, and Yucatán, and the northernmost portion of Be...

Los sistemas de producción agropecuarios (SPA) en la Península de Yucatán se han analizado con intenciones a su transformación agroforestal. Sin embargo, son escasos los intentos por diseñar sistemas agroforestales desde una perspectiva de integrar a la vegetación natural (VN) con los SPA y de aprovechar el potencial de capacidad de rebrote de la m...

The agricultural production systems (APS) in the Yucatan Peninsula (YP) have been analyzed with intentions to their agroforestry transformation. However, the resources for designing agroforestry from a perspective of integration to the natural vegetation (NV) with the APS and to take advantage of the potential of regeneration capacity of most of th...

El trabajo tuvo como objetivo determinar el contenido de proteína y materia seca en la semilla (%PROTSEMC, %MATSSEMC), cascara (%PROTCASC, %MATSCASC) y pulpa (%PROTPULC, %MATSPULC), y porcentaje de carbohidratos (%CARBCA), grasa (%GRASCRU) y ceniza (%CENCA) en la semilla de seis accesiones de calabaza chihua (Cucurbita argyrosperma Huber), nativas...

Arecaceae is one of the most morphologically diverse plant families in the world, represented by over 185 genera and 2600 species. The Mayan communities in the Mexican portion of the Yucatán Peninsula (YP) have made extensive use of these palm species as food, construction materials, handicrafts and medicine. Deforestation, intensive use of native...

A new species of Lophiaris (Orchidaceae, Onciidinae), Lophiaris quichensis Coxic, Cetzal, Mó & Carnevali, from the department of Quiché, Guatemala, is herein described, illustrated, and characterized based on morphological features. It is here referred to the L. straminea complex (along with L. aurisasinorum, L. sierracaracolensis, and L. straminea...

In face of mass extinction of pollinating insects in many regions of the world, all pro- posals for their protection, both the older, classic as well as the new, should be com- prehensively used. Numerous agri-environmental programs that directly or indirectly protect pollinating insects seem to help in this regard. Of course, attention should be p...

Se evalúo el efecto de la inclusión de Moringa oleifera Lam. y Trichanthera gigantea (Bonpl.) Nees en la dieta de ovinos de pelo (Pelibuey) sobre su calidad seminal. Durante 90 días, se dividieron las dietas de 15 ovinos (24 kg ± 3.95) en tres tratamientos: T1: dieta integral con 30% de M. oleifera + pasto Taiwán (Pennisetum purpureum Schumach.), T...

We describe and illustrate a new nothospecies in the genus Laelia: L. × meavei Cetzal & E.A. Pérez-García. This new taxon is most likely the result of the introgression between Laelia rubescens fo. peduncularis and L. dawsonii fo. dawsonii. The description of L. × meavei is based on cultivated plants coming from a single locality: Sola de Vega, Oax...

In Mexico, extensive production systems have caused a drastic reduction in tropical forests and in biological diversity. Most of the agroforestry systems (AFS) in Mexico use leguminous species that naturally associate with arbuscular mycorrhiza fungi (AMF) and bacterial nitrogen fixing that aid the uptake of N and P in poor soils of the tropics. Th...

La Guía ilustrada de Orquídeas del Parque Nacional Montaña de Celaque busca ser una obra de referencia para la identificación de este grupo de plantas dentro del parque y para la porción occidental de Honduras. Lo anterior, se basa en el número de especies ilustradas en la guía e identificadas por expertos de orquídeas. Se incluye una imágen de...

The Yucatan peninsula (YP) is part of a biogeographical area characterised by its diversity of flora and fauna, among which are the birds, mainly hummingbirds, which are indicators of the state of conservation of the ecosystems. In birds, the site establishment and construction of nest plays a fundamental role for reproduction and survival rate, th...

Honey is defined as the sweet substance produced by some species bees from the nectar of the flowers or exudations of other living parts of the plants; which these bees collect, transform and combine with specific substances and then store in the honeycombs or their hives. The honeys have a variability in their color, aroma, flavor and viscosity de...

A new species of Cyrtopodium from Belize, C. vestitum, is described and illustrated. Its flowers are indistinguishable from those of Cyrtopodium macrobulbon, but the pseudobulbs are relatively shorter and thicker, ovoid ellipsoid, bearing proportionately more, densely packed internodes, and the leaves do not present an articulation, i.e., an abscis...

An very useful handbook, directed to agronomist and farmer who needs information about landraces races and varieties of corn in Yucatán Peninsule.

Turbina corymbosa (L.) Raf. =Rivea corymbosa (L.) Hallier f. (Convolvulaceae), due to the numerous flowers and the peak of flowering from December to January, is an important species for beekeeping on the Yucatan Peninsula in northern Mexico. For this reason, the amount and quality of nectar T. corymbosa, collected by the honey bee Apis mellifera L...

Fenugreek (Trigonella foenum-graecum L.) is a predominantly dryland crop belonging to the Fabaceae family and is closely related to alfalfa belonging to the same tribe. This annual forage legume species is an efficient biological agent for atmospheric nitrogen fixation through her microbial flora hosted in the root nodules. As such fenugreek is an...

The rapid deforestation in the state of Tabasco due to extensive livestock farming has resulted in the decrease of the original forest cover. Only 4% of the original vegetation remains and that vegetation is concentrated in the mountainous regions of the state. This destructive process continues due to support by the current government livestock po...

Background: The knowledge of native melliferous flora (MF) may contribute to identify the diversity of species available for beekeeping activities during the dry and rainy seasons of the year in the Yucatan Peninsula (YP) region. The acute shortage of food resources considerably reduce local honey production and needs to be addressed appropriately...

Antecedentes y Objetivos: En la Península de Yucatán se han registrado hasta siete especies del género Indigofera: I. indica, I. jamaicensis, I. lespedezioides, I. suffruticosa, I. thibaudiana, I. tinctoria e I. trita ssp. scabra. El propósito de este estudio es evaluar la diversidad del género en los tres estados de la península, Campeche, Quintan...

Five new natural hybrids of Lophiaris (Orchidaceae, Oncidiinae) are described and their accompanying illustrations provided. The five new nothospecies are: Lophiaris 3 cicyi (L. lurida 3 L. tapiae) from Campeche, Mexico, L. 3 lindeoerstedii (L. lindenii 3 L. oerstedii) from Quintana Roo, Mexico, L. 3 lurilindenii (L. lindenii 3 L. lurida) from Oaxa...

A synopsis of the Encyclia ambigua complex, a member of the E. ceratistes clade, is presented. It is composed of three species, namely E. ambigua, E. trachychila, and E. dressleri. These taxa are restricted to the southern part of Megamexico in Mexico, Guatemala, Honduras, and Nicaragua and occur mostly in oak-pine or broadleaf evergreen forests, o...

Pluchea yucatanensis G.L. Nesom es una especie endémica de la Provincia Biótica península de Yucatán. Fue descrita por Guy L. Nesom en 1989, con base en una planta recolectada por el botánico William Campbell Steere en 1932, de una zona pantanosa del municipio de Champotón, Campeche. A pesar de que este ecosistema aún se conserva en los alrededores...

Background: Attaining a reasonable floristic knowledge for any given region is a progressive task, of gradual, periodic accumulation of data with no deadline, beyond programmatic or budgetary limitations. The knowledge gained synthesized in floristic checklist, regional taxonomic treatments, and floras. The taxonomic studies of particular groups, t...

Home gardens represent an important agri-forestry systems widely practiced across the Yucatan Peninsula of Mexico successfully combining tree and shrubs; along with annual and perennial agricultural crop species and farm animals. They are found around houses in the rural settlements of Mexico mostly under the family management. However, the practic...

The Encyclia adenocarpos complex is restricted to the Pacific slopes of Megamexico, from Sonora, Mexico, to northern Nicaragua. It is characterized by pyriform to suborbicular pseudobulbs, (1-)2-3(4) thickly coriaceous, narrow leaves (> 15 times longer than wide), thin, verruculose inflorescences, and a verruculose ovary. The column is broad and wi...

En México, la apicultura es una de las principales actividades del sector agropecuario debido a su producción de miel de alta calidad la cual es apreciada en diversos países de Europa. Esta actividad es practicada por más de 40000 productores, que cuentan con alrededor de dos millones de colmenas en apiarios distribuidos en las cinco regiones apíco...

La epidemiología, estudia los eventos relacionados con la salud y la aplicación de estos estudios para el control de enfermedades en las poblaciones, su importancia en la “actividad apícola” radica actualmente en la detección de numerosas enfermedades, plagas que afectan la sanidad de colonias de abejas melíferas (Apis mellifera L.). En este sentid...

En países tropicales de América, plantas exóticas como Moringa oleifera Lam. (Moringaceae), han sido escasamente evaluadas a pesar de poseer diversos atributos agro-ecológicos para la ganadería. El objetivo de esta revisión es presentar a M. oleifera, como una especie arbórea con alto potencial para la ganadería ecológica en las zonas tropicales de...

Biofuel is an emerging agri-industry that has the potential to change the agricultural economics of both developed, as well as developing, and underdeveloped nations in the not so distant future. Biofuels are regularly replacing fossil fuels to generate power, heat, and chemicals. The extensive use of biofuels in the future for energy generation is...

Pszczoły – to niezwykle różnorodna i ważna grupa owadów; około 4600 gatunków pszczół występuje w Ameryce Północnej. Dzikie pszczoły „świadczą usługi” w zakresie zapylania roślin, a ich działalność jest prawdopodobnie nawet więcej warta niż działalność pszczół miodnych na całym świecie. Są one słabo zbadane na większości obszarów, ale na terenach, d...

Se presenta una flora ilustrada de las plantas vasculares del Instituto Tecnológico de Chiná, Campeche, México. Esta incluye hasta el momento 170 taxa, repartidos en 53 familias, 133 géneros, 159 especies, tres subespecies y ocho variedades que crecen de manera natural, naturalizadas o cultivadas dentro de la Institución. Se incluyen 141 taxones na...

Biodiversity conservation and production of foods imply a hard trade-off with no simple solutions routes. However, changing conventional agrarian and animal husbandry models to an agroforestry one is an important approach for achieving a better equilibrium between both economical and conservative goals. Agroforestry systems (AFS) for tropical lands...

The objective of this study was to evaluate the changes in the composition, biomass yield and forage nutritive quality of two tropical grasses, Panicum maximum Jacq. and Brachiaria brizantha (Hochst. ex A. Rich.) Stapf (Poaceae), associated with Leucaena leucocephala (Lam.) de Wit (Fabaceae), under semi-controlled conditions. Two seedlings of each...

Se contribuye al conocimiento de la diversidad florística de la familia Orchidaceae presente en el sistema fluvio-lagunar-deltaico Palizada-del Este (SFLD-PE) a partir de los datos obtenidos de 15 recolectas realizadas en 10 sitios, durante agosto 2013 a febrero 2014. El listado incluye 27 especies en 17 géneros. Ocho especies son nuevos registros...

Increasing the amount of heavy metals in the soil influences the production of contaminated food products. A common phenomenon is the inhibition of plant growth by heavy metals. Plant cultivation in the contaminated soils is problematic due to the accumulation of heavy metals in various organs. For many years, influences of metal toxicity on plants...

In the days before the advent of science, human beings were completely dependent upon Mother Nature for every single aspect of their lives: be it food, shelter or health. Every aspect of natural resources including plants would prove useful to our pre-historic ancestors for the maintenance of their health. However, not enough useful information reg...

In the days before the advent of science, human beings were completely dependent upon Mother Nature for every single aspect of their lives: be it food, shelter or health. Every aspect of natural resources including plants would prove useful to our pre‐historic ancestors for the maintenance of their health. However, not enough useful information reg...

The Yucatan Peninsula as biogeographic province consists of the Mexican states of Campeche, Quintana Roo, and Yucatan, a more natural area also includes the northern regions of Belize, and Guatemala, and it is known as the Yucatan Peninsula Biotic Province. This province has karst geology, low surface hydrography, elevations below 350 meters, and a...

The orchid flora of Guatemala includes 1,200 species; representing 10% of the total species present in the world, demonstrating rich biodiversity. Among the orchids, the subtribe with the highest number of endangered species is Pleurothallidinae; because their species lack pseudobulbs and are plants that die during the summer from dehydration. Howe...

The factors that limit maize production in Yucatán, México are decreasing yields and a constant increase of weedy species. A strategy to deal with these problems is to develop diversified productive schemes, such as agroforestry systems (SAF). This study determined the cover dynamics and biomass of weeds in an SAF composed of forage trees and maize...

Resumen Se presentan nuevos registros de Gentianaceae y Lentibulariaceae para la flora de Honduras. Utricularia endresii de los departamentos Atlántida, Comayagua y Olancho, U. jamesoniana (Lentibulariaceae) de los departamentos Atlántida, Comayagua, Gracias a Dios y Olancho y Voyria truncata (Gentaniaceae) del departamento Comayagua. Además, se pr...

Fenugreek (Trigonella foenum-graecum L.) is an annual forage legume and a traditional spice and aromatic crop that has been grown for centuries across the Indian subcontinent. In addition to South Asia, the crop is also grown in some parts of North Africa, Middle East, Mediterranean Europe, China, South East (SE) Asia, Australia, the USA, Argentina...

Fenugreek (Trigonella foenum-graecum L.), an annual forage legume is also well known around the globe as an important spice crop; as well as a medicinal herb since it is rich in several important phytochemicals with positive impacts on human health. The nutraceutical and functional food industry is slowly but steadily transforming into an important...

Landraces corn is detailed in their principal characteristics, to show the broad avalilability of germplasm in the Yucatán Peninsule, in a very comprehensive explaination, accesible to agronomist and farmer.

We present a synopsis of the Trichocentrum-clade of Oncidiinae. In this revision, we recognize 85 taxa assigned to four genera: Cohniella with 23 species in five complexes and two natural hybrids; Lophiaris with 27 species and eight natural hybrids, six of which are yet to be named; Trichocentrum with 27 species and two subspecies; and Lophiarella...

The orchid flora of Puebla State represents 16% of the total species present in Mexico demonstrating rich biodiversity. However, several municipalities in the north-east of Puebla area are located within a conservation priority area for its tropical montane cloud forest and tropical rain forest due to decision of the Comisión Nacional para el Conoc...

The production of native corn at regional level is greatly limited by the seasonality of rainfall, availability of adequate lands, poor fertility status of the soil, high input costs and constraints of resources of the local corn growers and/or producers. The challenges of reduced cultivable area give very little opportunity for increasing producti...

Sansevieria zeylanica (L.) Willd. (Asparagaceae ) is a plant native to Sri Lanka, but is currently distributed in the tropics and subtropics across the world as a well-known ornamental species. In the Yucatan Peninsula, Mexico, this species grows in disturbed areas adjoining the towns and villages and has been used as a supplement to local cattle f...

Fenugreek (Trigonellafoenum-graecum L.sp.) is one of the oldest reported medicinal plant, spice herb and forage crop in the world. The plant is believed to be native to the Mediterranean region. Indigenous species of fenugreek have been reported from Asia, North Africa, Europe and Australia. Over 25 species of fenugreek are reported across the glob...

Cyperus canus J.Presl & C.Presl (Cyperaceae) it is a native plant of tropical America, distributed from southern Mexico and Guatemala to Colombia. This species is found along the shores of lakes, streams and marshy places and are sometimes found on rocks, at altitudes of 200-1500 meters above the mean sea level. It is quite rare to find the plants...

RESUMEN Se registran 11 novedades para la flora de Honduras a partir de ejemplares recolectados en el Parque Nacional Montaña Celaque. Los nuevos registros son: Tillandsia mateoensis (Bromeliaceae), Diastema affine (Gesneriaceae), Scutellaria costaricana (Lamiaceae), Miconia contrerasii (Melastomataceae), Acianthera violacea, Dendrophylax porrectus...

RESUMEN Se registran 11 novedades para la flora de Honduras a partir de ejemplares recolectados en el Parque Nacional Montaña Celaque. Los nuevos registros son: Tillandsia mateoensis (Bromeliaceae), Diastema affine (Gesneriaceae), Scutellaria costaricana (Lamiaceae), Miconia contrerasii (Melastomataceae), Acianthera violacea, Dendrophylax porrectus...

La actividad apícola es una de las principales actividades agropecuarias generadoras de divisas a nivel nacional. Existen aproximadamente 40,000 productores que manejan aproximadamente dos millones de colonias, de las cuales obtienen ingresos para mejorar la calidad de vida de sus familias. En general, en el manejo apícola se hace necesario utiliza...

Marsdenia (Apocynaceae: Asclepiadoideae, Marsdeniae) is represented by five species in the Mexican Yucatan Peninsula (vs. seven in the whole of the province), one of which is herein proposed as new to science. The new species, Mardenia calichicola Carnevali & Juárez-Jaimes, is only known from a narrow strip of sub-xerophytic forests over calcareous...