Results 51 to 60 of about 452 (152)

Early evolutionary history of the seed

Biological Reviews, Volume 101, Issue 3, Page 1511-1553, June 2026.
ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman, Alan R. T. Spencer, Jason Hilton   +2 more
wiley   +1 more source

Spatial Distribution and Conservation Prioritization of Medicinal Gymnosperms in China Using an Optimal Set‐Cover Approach

Ecology and Evolution, Volume 16, Issue 5, May 2026.
The study identified 41 priority conservation grids and 8 critical conservation gaps not covered by national reserves for medicinal gymnosperms. We proposed a practical, multi‐dimensional framework for their conservation. ABSTRACT To elucidate the geographical distribution patterns and hotspots of medicinal gymnosperms in China, providing a scientific ...
Lisi Hai, Xinyi Wang, Yuchang Yang, Rui Shu, Yanqin Xu, Guibing Lin, Lihua Dong, Xiaobo Zhang, Zhangjian Shan   +8 more
wiley   +1 more source

Genetic structure and demographic history of Cycas chenii (Cycadaceae), an endangered species with extremely small populations

Plant Diversity, 2017
Geological activities and climate oscillations during the Quaternary period profoundly impacted the distribution of species in Southwest China. Some plant species may be harbored in refugia, such as the dry-hot valleys of Southwest China. Cycas chenii X.
Rui Yang, Xiuyan Feng, Xun Gong
doaj   +1 more source

The genus Cycas (Cycadaceae) in India

Telopea, 2007
The genus Cycas is reviewed for India. Eight species are treated, one of them published for the first time (Cycas indica). The species are placed within an infrageneric classification previously outlined. Distributions of all taxa are mapped, and a key to species is provided.
Lindstrom, Anders J., Hill, Kenneth
openaire   +1 more source

Patterns of Tree Species Abundance and Diversity on Urban Sidewalks in Macapá, Amapá, Brazil

Ecological Research, Volume 41, Issue 2, March 2026.
This study presents the first systematic inventory of street trees in Macapá, Northeastern Brazilian Amazon. Results reveal a dominance of exotic and fruit‐bearing species, low tree density, and a replacement of large canopy trees by smaller ones, indicating potential losses in ecosystem services and the need for more biodiversity‐focused afforestation
Lorena Antunes Jimenez, Taíssa Barros Lobato Cambraia, Estefany Baia Furtado, Wegliane Campelo, Saulo Meneses Silvestre de Sousa, Laísa Maria Freire, Lúcio Royer Trujillo, Ricardo Angelo Pereira Lima, José Julio Toledo   +8 more
wiley   +1 more source

The historical demography and genetic variation of the endangered Cycas multipinnata (Cycadaceae) in the red river region, examined by chloroplast DNA sequences and microsatellite markers. [PDF]

PLoS ONE, 2015
Cycas multipinnata C.J. Chen & S.Y. Yang is a cycad endemic to the Red River drainage region that occurs under evergreen forest on steep limestone slopes in Southwest China and northern Vietnam.
Yi-Qing Gong, Qing-Qing Zhan, Khang Sinh Nguyen, Hiep Tien Nguyen, Yue-Hua Wang, Xun Gong   +5 more
doaj   +1 more source

The genus Cycas (Cycadaceae) in The Philippines

Telopea, 2008
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Lindstrom, Anders J., Hill, Kenneth, Stanberg, Leonie   +2 more
openaire   +1 more source

Chemical Element Concentrations of Cycad Leaves: Do We Know Enough?

Horticulturae, 2020
The literature containing which chemical elements are found in cycad leaves was reviewed to determine the range in values of concentrations reported for essential and beneficial elements.
Benjamin E. Deloso, Murukesan V. Krishnapillai, Ulysses F. Ferreras, Anders J. Lindström, Michael Calonje, Thomas E. Marler   +5 more
doaj   +1 more source

Distribution and DNA profiling of Cycas beddomei Dyer. : A critical endangered gymnosperm.

Agricultura, 2014
Cycas beddomei is a   critically endangered  plant species belonging to the cycadales of the  gymnosperm under family Cycadaceae grown in the hill slopes and grassy woodland forest.  It is considered as a living fossil, as its distribution is very ...
Gyana Ranjan Rout
doaj   +1 more source

Progress in the study of dioecy in Mexican cycad species and its implications for conservation

Plant Species Biology, Volume 40, Issue 6, Page 556-571, November 2025.
Cycads are endangered dioecious plants of great ornamental value that have a long period of sexual maturity. Therefore, it is crucial to have methods for early sex determination that can help to develop effective strategies for their conservation. Abstract Dioecy is a system of sexual reproduction in plants, characterized by the spatial separation of ...
Lourdes Georgina Iglesias Andreu, María Ydelia Sánchez‐Tinoco, Miguel Angel Perez‐Farrera   +2 more
wiley   +1 more source