Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Víctor W. Steinmann"'
Autor:
Tecoatlayopeuh Nelly Sandoval-Mata, Luis Hernández-Sandoval, Guadalupe Munguía-Lino, Víctor W. Steinmann, Alfonso Delgado-Salinas
Publikováno v:
Botanical Sciences, Vol 100, Iss 1 (2024)
Antecedentes: Dalea es endémico de América, posee amplia distribución en la provincia del Desierto Chihuahuense, sus especies se asocian a matorral xerófilo, bosque de encino y bosque de coníferas. Hipótesis: Las especies de Dalea funcionan
Externí odkaz:
https://doaj.org/article/f77292257b30445eb81f3f81817a08de
Publikováno v:
Anales del Jardín Botánico de Madrid, Vol 64, Iss 2, Pp 123-133 (2007)
Cubanthus (Euphorbiaceae) has traditionally been recognized as a small genus of three similar species restricted to Cuba and Hispaniola. In this study we used DNA sequence data from the nuclear ITS and chloroplast ndhF gene regions to investigate its
Externí odkaz:
https://doaj.org/article/7f4325b02d874b0ea749554f60e90bc5
Autor:
Victor W. Steinmann
Publikováno v:
Taxonomy, Vol 2, Iss 3, Pp 291-297 (2022)
Euphorbia marciae, a new species from the lowlands of the Balsas Depression in southwestern Mexico, is described and illustrated. The species was first collected by the renowned botanist George B. Hinton during his explorations of the area in the 193
Externí odkaz:
https://doaj.org/article/789062760ec4408e842d248ab971c5bb
Autor:
Victor W. Steinmann
Publikováno v:
Taxonomy, Vol 1, Iss 4, Pp 395-424 (2021)
A taxonomic and nomenclatural review of the genus Croton (Euphorbiaceae) in the Mexican state of Michoacán is presented. Six sections and 20 species are here reported. The greatest diversity is in the Balsas Depression province, where at least 12 sp
Externí odkaz:
https://doaj.org/article/94cc771caf54484cba5bf4b65912bbf1
Autor:
Victor W. Steinmann, Warren D. Stevens
Publikováno v:
Botanical Sciences, Vol 100, Iss 3 (2022)
Background: Polystemma (Apocynaceae subfamily Asclepiadoideae) is a small genus currently with seven species characterized by having white glandular trichomes becoming crystalline in age; filiform corona appendages; and fusiform, smooth, mottled foll
Externí odkaz:
https://doaj.org/article/2adf38f3bca8460ea01678bc1368e6fc
Autor:
Victor W. Steinmann
Publikováno v:
Botanical Sciences, Vol 99, Iss 3 (2021)
Antecedentes: Entender la distribución y composición de los ecosistemas es fundamental para la conservación. Los estudios florísticos y de vegetación son de vital importancia en las Áreas Naturales Protegidas dado que albergan recursos biológi
Externí odkaz:
https://doaj.org/article/44a826a28a584850833fc2f5d928af5e
Autor:
Eduardo Ruiz-Sanchez, Carlos Alonso Maya-Lastra, Victor W. Steinmann, Sergio Zamudio, Eleazar Carranza, Rosa María Murillo, Jerzy Rzedowski
Publikováno v:
Botanical Sciences, Vol 97, Iss 4 (2019)
Background: GenBank is a public repository that houses millions of nucleotide sequences. Several software have been developed to extract information stored in GenBank. However, none of them are useful to extract and organize GenBank accession based o
Externí odkaz:
https://doaj.org/article/4d96557137cc4e518f7721f4ff4921f5
Autor:
Victor W. Steinmann, Libertad Arredondo-Amezcua, Rodrigo Alejandro Hernández-Cárdenas, Yocupitzia Ramírez-Amezcua
Publikováno v:
Diversity, Vol 13, Iss 1, p 31 (2021)
Alpine vegetation is scarce in central Mexico (≈150 km2) and occurs on the 11 highest peaks of the Trans-Mexican Volcanic Belt (TMVB). Timberline occurs at (3700) 3900 m, and at 4750 m vascular plants cease to exist. The alpine vascular flora compr
Externí odkaz:
https://doaj.org/article/144ffb709b7a4fc591824b8b3f8d36f1
Publikováno v:
Acta Botanica Mexicana, Iss 104, Pp 93-100 (2013)
Se describe e ilustra a Acidocroton madrigalensis, una nueva especie del estado de Tabasco, México. Se conoce solamente de la Sierra El Madrigal y el Cerro La Campana, en donde es un componente abundante del estrato bajo en la selva alta perennifoli
Externí odkaz:
https://doaj.org/article/3276f31bce834b58bbbdcf90576d5c4d
Publikováno v:
Anales del Jardín Botánico de Madrid, Vol 68, Iss 2, Pp 167-173 (2011)
Two new species of sect. Nummulariopsis, Euphorbia guaraniorum and E. cordeiroae, are described and illustrated. Euphorbia guaraniorum appears to be related to E. portulacoides and is distinguished by its densely arranged ensiform leaves. It is known
Externí odkaz:
https://doaj.org/article/b8ffb34c8dd944e096179819faf7f8db