Juarez Jaimes Verónica

• Universidad Nacional Autonóma de México

Asclepias (algodoncillos) es un género con 132 especies en América que se distribuyen desde Canadá hasta Argentina. Algunas especies tienen gran importancia en el estudio de procesos biológicos, así como en la medicina tradicional y alópata. Sin embargo, el conocimiento sobre su diversidad y distribución en México no ha sido bien documentado. Los o...

Matelea falcata Juárez-Jaimes, G. M. Hernández-Barón & W. D. Stevens (Apocynaceae, Asclepiadoideae) is described and illustrated. This new taxon grows in secondary vegetation derived from semi-evergreen forest, around the Loltún caves in the state of Yucatán, Mexico. It resembles M. gentlei (Lundell & Standl.) Woodson; it is recognized by its pinwh...

Los Tuxtlas Region in the Veracruz state has approximately 2,548 species of vascular plants, this is why it is considered one of the areas with largest floristic diversity in the state. The Asclepiadoideae subfamily (Apocynaceae) contributes substantially to the richness of the vascular flora of the area. In this study we estimated the number of ge...

Although long‐standing theory suggests that biotic variables are only relevant at local scales for explaining the patterns of species' distributions, recent studies have demonstrated improvements to species distribution models (SDMs) by incorporating predictor variables informed by biotic interactions. However, some key methodological questions rem...

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...

A new species, Marsdenia stevensiana Juárez-Jaimes (Apocynaceae, Asclepiadoideae), from the state of Chiapas in southeastern Mexico, is described and illustrated. It is distinguished by a fleshy, semicircular, papillose, and glabrous callus in each sinus of the corolla lobes, and this callus extends along the base of each lobe forming a continuous...

A new species of Marsdenia (Apocynaceae; Asclepiadoideae) from montane cloud forest in the state of Guerrero, Mexico, is described and illustrated. Marsdenia microcarpa is distinguished from congeners by a gynostegial corona with lobes oblong-ovate, adnate to the gynostegium, apices obtuse, free, erect or divergent, lobe margins connate at base, a...

A new species, Marsdenia ludani Juárez-Jaimes & Saynes (Apocynaceae, Asclepiadoideae), is described and illustrated. The species occurs in the tropical semi-evergreen forest of Pochutla, a region in the state of Oaxaca, Mexico, best known for botanical explorations and collecting activities by the Sociedad para el Estudio de los Recursos Bióticos d...

Chemical study of the aerial parts of Asclepias otarioides led to the isolation of four pentacyclic triterpenes and one cardenolide glycoside. This is the first report on the occurrence of the triterpenes 1, 3, and 4 in the genus Asclepias.

The genus Marsdenia (Apocynaceae, Asclepiadoideae) is principally found in tropical and subtropical regions of the world and includes about 200 species. Mexico has 31 species; 8 are distributed in Guerrero State. This paper presents a key to species identification, descriptions, illustrations, distribution maps in the state, as well as conservation...

El género Marsdenia (Apocynaceae, Asclepiadoideae) se encuentra principalmente en las regiones tropicalesy subtropicales del mundo e incluye alrededor de 200 especies. México cuenta con 31 especies descritas, de la cuales8 se distribuyen en Guerrero. Este trabajo presenta una clave para la identificación de las especies, descripciones,ilustraciones...

Highlights ►The first chemical study of Marsdenia callosa was carried out. ► Four triterpenes and conduritol A were isolated from the title plant. ► Two of the triterpenes are esters of the unusual 5-phenyl-(2E,4E)-penta-2,4-dienoic acid.

A new species of Tabernaemontana L. (Apocynaceae; Rauvolfioideae), from the state of Oaxaca, Mexico, is described. The new taxon can be distinguished from the other Mexican species of the genus by the presence of muricate fruits. A distribution map and comments about its risk status are provided.

Juárez-Jaimes, V. & L. O. Alvarado-Cárdenas (2010). Two new species of Marsdenia R. Br. (Apocynaceae) from Mexico. Candollea 65: 63–68. In Spanish, English and French abstracts. Two new species of Marsdenia R. Br. (Apocynaceae, Asclepiadoideae: Marsdenieae) from Mexico are described and illustrated, Marsdenia cuixmalensis Juárez-Jaimes & L. O. Alva...

JUAREZ-JAMES, V. & L. O. ALVARADO-CARDENAS (2010). Two new species of Marsdenia R. Br. (Apocynaceae) from Mexico. Candollea 65: 63-68. In Spanish, English and French abstracts. Two new species of Marsdenia R. Br. (Apocynaceae, Asclepiadoideae: Marsdenieae) from Mexico are described and illustrated, Marsdenia cuixmalensis Juarez-Jaimes & L. O. Alvar...

Recent studies of the Asclepiadoideae (Apocynaceae) in southern and western Mexico have revealed a new species here described and illustrated as Gonolobus spiranthus Juárez-Jaimes, W. D. Stevens & Lozada-Pérez. This species is distinguished by having a tubular corolla more than 12 mm long that is inflated at the base, strongly spiraled corolla lobe...

El redescubrimiento y estudios consecuentes de Asclepias zacatecana McVaugh, una especie endémica de Zacatecas de distribución restringida, muestra que es sinónimo de A. schaffneri A. Gray, la cual a su vez ha sido incluida como parte de A. quinquedentata A. Gray. Se discute porqué A. shaffneri es diferente de A. quinquedentata y es el nombre corre...

Marsdenia magallanesiana Juárez-Jaimes, una nueva especie del estado de Jalisco, es descrita e ilustrada, se compara con M. edulis S. Watson y M. callosa Juárez-Jaimes & W. D. Stevens, que son las especies más similares morfológicamente. Las tres especies crecen en áreas separadas de las selvas bajas caducifolias del Pacífico mexicano. Sin embargo,...

Marsdenia popoluca (Asclepiadaceae), is described as a new species from the Biology Station of Los Tuxtlas and surrounding area in the state of Veracruz, Mexico. Marsdenia popoluca is recognized by its ovate leaves measuring more than 18 cm long, base cordate, petiole 5.5-9.5 cm long; corolla densily hirsute in the throat, style apex capitate; foll...

Asclepias is an American genus of wide geographical distribution. Of the 68 species of Asclepias occurring in Mexico, 17 have reported uses. This article focuses on 14 species used as medicinal plants by many social groups, including indigenous cultures that possess a vast knowledge of traditional medicine. The medicinal species contain alkaloids,...

Palabras clave: Apocynaceae s.l., Apocynoideae, Asclepiadoideae, Rauvolfi oideae, Diversidad. Abstract. Apocynaceae s.l. is among the 15 most diverse families in Mexico, with a total of 385 species, distributed in 50 genera and 3 subfamilies of which Asclepiadoideae is the most diverse in numbers of genera, species and endemics. The genera with the...

Apocynaceae s.l. is among the 15 most diverse families in Mexico, with a total of 385 species, distributed in 50 genera and 3 subfamilies of which Asclepiadoideae is the most diverse in numbers of genera, species and endemics. The genera with the most native species and endemics are Asclepias and Matelea. The richest states in terms of taxon divers...

A new species, Marsdenia hiriartiana, is described and illustrated. This species is similar to Marsdenia macrophylla (Humboldt & Bonpland ex Schultes) E. Fournier, and M. altissima (Jacquin) Dugand, but it is distinguished from the first by its suborbicular to orbicular leaves and follicles 22 to 30 cm long, and from the second because it is glabro...

Marsdenia carterae, a new species of Apocynaceae (Asclepiadoideae, Marsdenieae) from Baja California Sur, Mexico, is described and illustrated. This is the first North American species of Marsdenia with verticillate leaves and is also notable in lacking a developed corona and for its non-twining habit.

Se describe e ilustra a Marsdenia callosa, una nueva especie de Asclepiadaceae del Sur de México, que por mucho tiempo ha sido confundida con Marsdenia edulis S. Watson, la cual presenta una distribución más norteña. La principal característica que distingue a Marsdenia callosa de M. edulis es la presencia de un callo anular y carnoso con pelos dor...

Marsdenia rzedowskiana es descrita como nueva. Esta especie ha sido confundida con M. macrophylla (Humboldt & Bonpland ex Schultes) E. Fournier pero está más relacionada con M. pringlei S. Watson. La distribución de M. rzedowskiana está restringida al noreste de Puebla y partes adyacentes de Veracruz, hacia el sur de la distribución conocida de M....