Results 61 to 70 of about 3,647 (212)

Population genetics of Zamia decumbens (Zamiaceae, Cycadales), an endangered cycad from the Maya Mountains of Belize

open access: yesPlant Species Biology, Volume 40, Issue 4, Page 324-340, July 2025.
We utilized 10 microsatellite loci to examine the genetic diversity, genetic structure, and demographic history of Zamia decumbens Calonje, Meerman, M.P. Griff. & Hoese, an endangered cycad species occurring in small disjunct populations on karst topography within the Maya Mountains of Belize.
Michael Calonje   +4 more
wiley   +1 more source

Distribución, ciclo biológico y tabla de vida de Eumaeus toxea (Lepidoptera:Lycaenidae) en la provincia fisiográfica Costa de Oaxaca, México

open access: yesRevista Mexicana de Biodiversidad, 2015
La mariposa Eumaeus toxea es un herbívoro que se alimenta de Zamia paucijuga, una cícada considerada amenazada y vulnerable, con unatendencia a la disminución y desaparición de sus poblaciones.
Noe Ruiz-García   +4 more
doaj   +1 more source

Cícadas, fósiles vivientes del reino vegetal [PDF]

open access: yes, 2017
Fil: Martínez, Leandro Carlos Alcides. Instituto de Botánica Darwinion; ArgentinaFil: Artabe, Analía Emilia Eva. Universidad Nacional de La Plata.
Artabe, Analía Emilia Eva   +1 more
core   +2 more sources

Threats to cycad biocultural heritage in the Amami Islands, Japan

open access: yesPlant Species Biology, Volume 40, Issue 4, Page 292-310, July 2025.
The central point we seek to frame in this article is that the increasing infestations of cycad aulacaspis scale in the Amami guntō existentially threaten not only the islands' sotetsu but rather entire cultural systems and natural ecologies that have developed around these plants.
Joshua D. Englehardt   +4 more
wiley   +1 more source

Nathaniel Lord Britton (1859 - 1934) [PDF]

open access: yes, 2009
During his directorship of thirty-three years-a short space of time as the world goes-Doctor Britton had seen The New York Botanical Garden develop from little more than an idea to a well-developed tract of nearly 400 acres, with handsome buildings, an ...
Howe, Marshall Avery
core  

Systematics and Chatacteristics [PDF]

open access: yes, 2016
The "Tracheophyte Phylogeny Poster – Vascular Plants - Systematics and Characteristics" is an educational tool presenting an overview of the evolutionary relationships among non-flowering vascular plants (lycophytes, monilophytes, and gymnosperms ...
Cole, Theodor C.H., Hilger, Hartmut H.
core   +1 more source

Sex ratio and spatial distribution of Cycas panzhihuaensis in Sichuan Panzhihua cycad National Nature Reserve

open access: yesPlant Species Biology, Volume 40, Issue 4, Page 354-365, July 2025.
The sex ratio of the endemic gymnosperm Cycas panzhihuaensis is determined by the potential sex‐determining gene MADS‐Y. The study examined the sex dimorphism and spatial distribution of male and female individuals. The genotypic sex ratio of the C. panzhihuaensis population is balanced. Additionally, there is a significant clustering effect in spatial
Yong‐Qiong Yang   +8 more
wiley   +1 more source

Phylogenie und Systematik der Gefäßpflanzen [PDF]

open access: yes, 2016
Das Lehr- und Lernposter „Stammbaum der Tracheophyten – Phylogenie und Systematik der Gefäßpflanzen“ gibt einen Überblick a) über die Phylogenie (Stammesgeschichte) der „Farnverwandten“ (Lycophyten und Monilophyten, die „Farne“) bis zu den Familien ...
Cole, Theodor C.H., Hilger, Hartmut H.
core   +1 more source

Comparative anatomy of leaflets of Zamia acuminata and Z. pseudomonticola (Zamiaceae) in Costa Rica

open access: yesRevista de Biología Tropical, 2013
The genus Zamia is morphologically and ecologically the most diverse of the order Cycadales. Throughout its history this genus has been restricted to the New World and is presently almost entirely restricted to the Neotropics.
Rafael Acuña-Castillo   +1 more
doaj   +2 more sources

Evaluación del riesgo de extinción de Zamia prasina en la Provincia Biótica Península de Yucatán

open access: yesRevista Mexicana de Biodiversidad, 2020
Zamia prasina es una cícada nativa de la Provincia Biótica Península de Yucatán. Esta especie fue categorizada, según la Norma Mexicana NOM-059 del 2010, como en protección especial (Pr) y según las normas de la Unión Internacional para la Conservación ...
Grecia Montalvo-Fernández   +4 more
doaj   +1 more source

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