Biology:Cycas zeylanica
| Cycas zeylanica | |
|---|---|
| |
| In Lund Botanical Gardens | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Gymnospermae |
| Division: | Cycadophyta |
| Class: | Cycadopsida |
| Order: | Cycadales |
| Family: | Cycadaceae |
| Genus: | Cycas |
| Species: | C. zeylanica
|
| Binomial name | |
| Cycas zeylanica (J.Schust.) A.Lindstr. & K.D.Hill
| |
| Synonyms[2] | |
|
Cycas rumphii subsp. zeylanica J.Schust. | |
Cycas zeylanica, common name (in Sri Lanka) maha-madu is a plant apparently at present endemic to the Andaman and Nicobar Islands. It was formerly also present in Sri Lanka, but the last remnants of the populations there were destroyed by the tsunami of December 2004.[1][3] A few trees are cited in Hanguranketha town Adikarigama area.
Cycas zeylanica is an unbranched shrub up to 3 m tall. Leaves are up to 200 cm long, green, glossy, pinnately compound with up to 100 leaflets. Pollen-producing cones fusiform (tapering at both ends), microsporophylls (male, pollen-producing) up to 45 mm long. Megasporophylls (female, ovule-producing) up to 30 cm long, each with 2-5 ovules. Seeds flattened to ovoid, orange-brown.[4][5]
References
- ↑ 1.0 1.1 Bösenberg, J.D. (2010). "Cycas zeylanica". IUCN Red List of Threatened Species 2010: e.T42098A10631926. https://www.iucnredlist.org/species/42098/10631926. Retrieved 26 June 2022.
- ↑ The Plant List
- ↑ Christenhusz, M. J. M., J. L. Reveal, A. K. Farjon, M. F. Gardner, R. R. Mill & M. W. Chase. 2011. A new classification and linear sequence of extant gymnosperms. Phytotaxa 19: 55–70.
- ↑ Lindstrom, AJ, & KD Hill. 2002. Notes on the species of Cycas (Cycadaceae from Sri Lanka and the islands of the Andaman Sea. Novon 12:237-240.
- ↑ Schuster, Julius. 1932. Das Pflanzenreich 99: 75, pl. 10C–D, llK–M.
Wikidata ☰ Q6857581 entry
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