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Search Results: 1 - 10 of 466321 matches for " Gerardo A.;García-Mendoza "
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A new species of Dichromanthus (Orchidaceae, Spiranthinae) from Oaxaca, Mexico
Salazar, Gerardo A.;García-Mendoza, Abisaí;
Revista mexicana de biodiversidad , 2009,
Abstract: dichromanthus yucundaa, a new orchid species from the mixteca alta region of the sierra madre del sur in oaxaca, mexico, is described and illustrated. it is distinguished from d. cinnabarinus, the most similar species, by the more compact plants, glabrous inflorescence, prominent, broadly ovate, glabrous floral bracts which are abaxially glaucous, sparsely and minutely glandular-pubescent sepals (merely papillose near the apex), short column foot, viscidium sheathing the apex of the rostellum and without a retrorse prominence, and rostellum remnant stiff and pointed.
A new species of Dichromanthus (Orchidaceae, Spiranthinae) from Oaxaca, Mexico Una especie nueva de Dichromanthus (Orchidaceae, Spiranthinae) de Oaxaca, México
Gerardo A. Salazar,Abisaí García-Mendoza
Revista mexicana de biodiversidad , 2009,
Abstract: Dichromanthus yucundaa, a new orchid species from the Mixteca Alta region of the Sierra Madre del Sur in Oaxaca, Mexico, is described and illustrated. It is distinguished from D. cinnabarinus, the most similar species, by the more compact plants, glabrous inflorescence, prominent, broadly ovate, glabrous floral bracts which are abaxially glaucous, sparsely and minutely glandular-pubescent sepals (merely papillose near the apex), short column foot, viscidium sheathing the apex of the rostellum and without a retrorse prominence, and rostellum remnant stiff and pointed. Se describe e ilustra a Dichromanthus yucundaa, especie nueva de orquídea de la región de la mixteca alta de la sierra Madre del Sur en Oaxaca, México. Se distingue de D. cinnabarinus, la especie más similar, por las plantas más compactas, la inflorescencia glabra, las brácteas florales prominentes, ampliamente ovadas, glabras, abaxialmente glaucas, los sépalos diminuta y esparcidamente glandular-pubescentes (diminutamente papilosos cerca del ápice), el pie de columna corto, el viscidio envainando el ápice del rostelo y careciendo de una prominencia retrorsa y el remanente rostelar rígido y aguzado.
Revisión taxonómica del complejo Agave potatorum Zucc. (Agavaceae): nuevos taxa y neotipificación
García-Mendoza, Abisaí Josué;
Acta botánica mexicana , 2010,
Abstract: the agave potatorum complex, of group hiemiflorae, is revised. two new taxa from oaxaca, agave nussaviorum and a. nussaviorum subsp. deltoidea, are described and illustrated. the new species is compared with agave seemanniana jacobi and a. potatorum zucc. information concerning its distribution, ethnobotany, and phenology, and an identification key to the taxa of the complex are provided.
Tres especies nuevas de Manfreda (Agavaceae) del sur de México
García-Mendoza, Abisaí Josué;
Revista mexicana de biodiversidad , 2011,
Abstract: three new species of manfreda (agavaceae) from guerrero and oaxaca, mexico are described and illustrated: manfreda justosierrana, m. umbrophila and m. verhoekiae. comments on their distribution, habitat, phenology and possible relationships to other species of the genus are provided
Especie nueva de Hymenocallis (Amaryllidaceae) de Oaxaca y Puebla, México
García-Mendoza, Abisaí Josué;
Revista mexicana de biodiversidad , 2010,
Abstract: hymenocallis vasconcelosii a new species from the oaxaca and puebla states, mexico, is described and illustrated. this species can be recognized by the following set of characters: oblong-elliptic leaves; flowers with shorter and narrower tepals, small and rotate staminal cup and triquetrous seeds with the abaxial side rounded. it is morphologically similar to h. harrisiana and h. glauca, from which it can be distinguished by its smaller vegetative and reproductive organs and few flowers. a table comparing the morphological features of the 3 species is included.
REVISIóN TAXONóMICA DEL COMPLEJO AGAVE POTATORUM ZUCC. (AGAVACEAE): NUEVOS TAXA Y NEOTIPIFICACIóN
Abisaí Josué García-Mendoza
Acta botánica mexicana , 2010,
Abstract: Se revisa el complejo taxonómico de Agave potatorum perteneciente al grupo Hiemiflorae. Se describen e ilustran dos taxa nuevos para la ciencia: Agave nussaviorum y A. nussaviorum subsp. deltoidea del estado de Oaxaca. La especie nueva se compara con Agave seemanniana Jacobi y A. potatorum Zucc. Se proporciona información sobre la distribución, usos, fenología y una clave para la separación de los taxa.
Especie nueva de Hymenocallis (Amaryllidaceae) de Oaxaca y Puebla, México New species of Hymenocallis (Amaryllidaceae) from Oaxaca and Puebla, Mexico
Abisaí Josué García-Mendoza
Revista mexicana de biodiversidad , 2010,
Abstract: Se describe e ilustra Hymenocallis vasconcelosii, especie nueva de los estados de Oaxaca y Puebla, México. Esta especie puede reconocerse por el siguiente conjunto de caracteres: pocas hojas oblongo-elípticas; flores con tépalos cortos y angostos, copa estaminal rotada, peque a y semillas triquetras con el lado abaxial redondeado. Morfológicamente, el nuevo taxon es similar a H. harrisiana e H. glauca de las cuales se diferencia porque todos sus órganos vegetativos y reproductivos son más peque os y por el menor número de flores. Se incluye un cuadro comparativo de las características distintivas de las 3 especies. Hymenocallis vasconcelosii a new species from the Oaxaca and Puebla states, Mexico, is described and illustrated. This species can be recognized by the following set of characters: oblong-elliptic leaves; flowers with shorter and narrower tepals, small and rotate staminal cup and triquetrous seeds with the abaxial side rounded. It is morphologically similar to H. harrisiana and H. glauca, from which it can be distinguished by its smaller vegetative and reproductive organs and few flowers. A table comparing the morphological features of the 3 species is included.
Tres especies nuevas de Manfreda (Agavaceae) del sur de México Three new species of Manfreda (Agavaceae) from southern Mexico
Abisaí Josué García-Mendoza
Revista mexicana de biodiversidad , 2011,
Abstract: Se describen e ilustran 3 especies nuevas del género Manfreda (Agavaceae) de los estados de Guerrero y Oaxaca, México: Manfreda justosierrana, M. umbrophila y M. verhoekiae. Para cada una se proporciona información sobre su distribución, hábitat, fenología y posibles relaciones con otras especies del género. Three new species of Manfreda (Agavaceae) from Guerrero and Oaxaca, Mexico are described and illustrated: Manfreda justosierrana, M. umbrophila and M. verhoekiae. Comments on their distribution, habitat, phenology and possible relationships to other species of the genus are provided
Polianthes oaxanana y P. geminiflora var. pueblensis (Agavaceae), taxa nuevos de México
Abisaí J. García-Mendoza,Eloy Solano
Acta botánica mexicana , 2007,
Abstract: Se describen e ilustran dos taxa nuevos para la ciencia: Polianthes oaxacana y P. geminiflora var. pueblensis. Polianthes oaxacana, del estado de Oaxaca, se ubica en el subgénero Bravoa; se caracteriza por sus flores tubulares, bilateralmente simétricas, con la parte distal campanulada y anteras adpresas a la porción superior del limbo del perigonio. Se compara con P. bicolor Solano & García-Mend. y P. mexicana Zucc. Polianthes geminiflora var. pueblensis del estado de Puebla, pertenece al subgénero Bravoa; se distingue de las otras variedades de P. geminiflora por sus hojas lineares con el margen papiloso a regularmente denticulado y por algunas características anatómicas
Reevaluación del riesgo de extinción de cinco especies del género Polianthes L. (Agavaceae)
Feria-Arroyo, Teresa Patricia;Solano, Eloy;García-Mendoza, Abisaí;
Acta botánica mexicana , 2010,
Abstract: we reassessed the extinction risk of the species polianthes densiflora, p. howardii, p. longiflora, p. palustris and p. platyphylla by applying the mer (method of evaluation of extinction risk of wild species for mexico). these species are listed as rare by the international union for conservation of nature (iucn) and are considered to be in the category of special protection according to mexican regulation. mer criterion a (geographic distribution) was assessed with three methods: area of occupancy, extent of ocurrence, and species distribution models. criteria b (habitat conditions) and d (impact of human activity) were examined by superimposing the human footprint map of sanderson et al., where values range from 0 to 100. in this map, 0-10 denote pristine areas and 100 indicates that the habitat has been completely transformed. criterion c (intrinsic biological vulnerability) was assigned based on the geophytic nature of the species. according to our findings, polianthes densiflora and p. longiflora are in danger of extinction, while p. howardii and p. platyphylla are endangered and p. palustris is likely extinct. none of the five species concerned occur in any natural protected area. we propose in situ and ex situ strategies to maintain these species as well as the development of programs of sustainable use for polianthes longiflora and p. platyphylla. these species could be cultivated and domesticated by means of vegetative propagation.
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