Cycad - Wikipedia
网页Cycads / ˈsaɪkædz / are seed plants that typically have a stout and woody (ligneous) trunk with a crown of large, hard, stiff, evergreen and (usually) pinnate leaves. The species are dioecious, that is, individual plants of a species are either male or female. Cycads vary in size from having trunks only a few centimeters to several meters tall.
Cycad | Description, Gymnosperm, Species, Examples, Uses, …
网页Cycad, any of the palmlike woody gymnospermous plants that constitute the order Cycadales. The order consists of three extant families, which contain about 10 genera and about 310 species. Some cycads are used as ornamental conservatory plants and are cultivated outdoors in warm climates.
How To Grow Cycads - Information On Cycad Care - Gardening Know How
网页2021年5月17日 · Cycad plants are hardy, evergreen gymnosperms (cone-bearing plants) that grow in sand or hard rock. Cycads are dioecious plants; there are separate male and female plants. The female plant produces seeds, and the male plant produces cones filled with pollen. The most popular cycad is the sago palm.
“Living fossil” cycad plants are actually evolution’s comeback …
网页2011年10月20日 · Cycads look superficially like palm trees, but they belong to a very different group. They first appeared on the planet around 280 million years ago, but they really hit their stride in the...
Cycads - Basic Biology
网页2015年5月22日 · Cycads are a group of gymnosperm trees and shrubs. They are woody, seed producing plants with no flowers or fruit. Cycads often look similar to palm trees with branchless stems and a crown of leave at the top of the tree, but they are not at all closely related to palm trees.
Cycas | Description, Cycad, Uses, Species, & Facts | Britannica
网页Cycas, genus of 115 species of palmlike cycads in the family Cycadaceae native to tropical and subtropical areas of the Old World. The leaves of sago palm (Cycas revoluta) are widely used as ceremonial “palms” and in floriculture.
Cycads: A comprehensive review of its botany, traditional uses ...
网页2024年4月1日 · Cycads, the earth's most ancient extant relict plants, represent the primordial group of seed plants (Wang et al., 2021). They offer an invaluable historical lens on growth and evolution, placing them at the heart of studies on the origins and evolution of seed plants (Fu, 2000).
7.1: Cycads - Biology LibreTexts
网页Cycads are one of the more ancient gymnosperm lineages, appearing in the fossil record around 300 million years ago. Currently, many extant species are in danger of extinction in the wild. However, during the Jurassic period, these plants would have …
Cycad - New World Encyclopedia
网页Cycads (division Cycadophyta) are an ancient group of seed plants characterized by a large crown of compound leaves and a stout, erect trunk up to seven meters (23 feet) high. They are evergreen, gymnospermous, dioecious (separate male and female) plants having large pinnately compound leaves.
Cycads: An Overview - SpringerLink
网页Cycads are regarded as the “Living Fossils” and belong to a specialized group of plants having ancient lineage possessing great significance from the evolutionary point of view. During excavations, the cycad fossils located and accepted as related to the...
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