Biology:Encephalartos mackenziei
| Encephalartos mackenziei | |
|---|---|
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Gymnospermae |
| Division: | Cycadophyta |
| Class: | Cycadopsida |
| Order: | Cycadales |
| Family: | Zamiaceae |
| Genus: | Encephalartos |
| Species: | E. mackenziei
|
| Binomial name | |
| Encephalartos mackenziei L.E.Newton
| |
Encephalartos mackenziei is a species of cycad in South Sudan. It is found in the Didinga Hills of Namorunyang State.[1]
Description
This cycad grows up to 3.5 m tall with a stem diameter of 35 cm. It starts upright but then bends over, producing many secondary stems from basal shoots. The pinnate leaves form a crown at the top of the stem, reaching up to 1.5 m long. Each leaf has several pairs of oval-shaped, leathery, and hairy leaflets, 15–17 cm long, with 3-5 spines on the upper edge and a sharp tip. They attach to the stem at a 45° angle. This species is dioecious, with male plants bearing up to 10 long, slender cones, about 22 cm long and 9 cm wide, initially light green and turning yellow when ripe. Female plants have 1-2 large, egg-shaped cones, about 40 cm long and 16-18 cm wide, initially light green and changing to olive-brown when ripe. The seeds are roughly egg-shaped, 3.5 cm long, and have an orange-red sarcotesta.[3]
References
- ↑ 1.0 1.1 Donaldson, J.S. (2010). "Encephalartos mackenziei". IUCN Red List of Threatened Species 2010: e.T178878A7633636. doi:10.2305/IUCN.UK.2010-3.RLTS.T178878A7633636.en. https://www.iucnredlist.org/species/178878/7633636. Retrieved 19 November 2021.
- ↑ "Appendices | CITES". https://cites.org/eng/app/appendices.php.
- ↑ Newton, Leonard E. (2002). "A new species of Encephalartos (Zamiaceae) in Sudan". Botanical Journal of the Linnean Society 140 (2): 187–192. doi:10.1046/j.1095-8339.2002.00094.x. ISSN 1095-8339.
External links
Wikidata ☰ Q3724983 entry
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