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The sporophyll of a fern. It is a fertile leaf bearing reproductive structures. In botany, a sporophyll is a leaf that bears sporangia.Both microphylls and megaphylls can be sporophylls.
Cycas is a genus of cycad, and the only genus in the family Cycadaceae with all other genera of cycad being divided between the Stangeriaceae and Zamiaceae families. Cycas circinalis, a species endemic to India, was the first cycad species to be described in western literature, and is the type species of the genus.
A strobilus (pl.: strobili) is a structure present on many land plant species consisting of sporangia-bearing structures densely aggregated along a stem.Strobili are often called cones, but some botanists restrict the use of the term cone to the woody seed strobili of conifers.
Cycas revoluta (Sotetsu [Japanese ソテツ], sago palm, king sago, sago cycad, Japanese sago palm) is a species of gymnosperm in the family Cycadaceae, native to southern Japan including the Ryukyu Islands.
Cycas pectinata has the most widespread distribution in South Asia, and is the only South Asian cycad species found outside India and Sri Lanka. India Cycas ...
Under each microsporophyll is one or several microsporangia (pollen sacs). The female cone (megastrobilus, seed cone, or ovulate cone) contains ovules which when fertilized by pollen become seeds. The female cone structure varies more markedly between the different conifer families and is often crucial for the identification of many species of ...
Cycas micronesica is a species of cycad found on the island of Yap in Micronesia, the Marianaislands of Guam and Rota, and The Republic of Palau. It is commonly known as federico nut or fadang in Chamorro. The species, previously lumped with Cycas rumphii and Cycas circinalis, was described as a unique species in 1994 by Ken Hill. [2]
The oldest records of the modern genus Cycas are from the Paleogene of East Asia. [31] Fossils assignable to Zamiaceae are known from the Cretaceous, [30] with fossils assignable to living genera of the family known from the Cenozoic. [18] Petrified cycad fossil, New York Botanical Garden