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Cycads in South Africa. Cycads / ˈ s aɪ k æ d z / are seed plants that typically have a stout and woody 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 ...
The leaves can be completely lost during cold periods, with the plant lying dormant in its tuberous root system, allowing this cycad to be relatively cold hardy. The plant can survive up to USDA region 8b (10° to 20°F). The stems and leaves regenerate after the cold period subsides with full foliage. [8] [9]
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. [4] [5]
While there are more than 200 species of cycads, only one is native to Florida, and only a couple are popular landscaping plants in our area.
Cycads all over the world are in decline, with four species on the brink of extinction and seven species have fewer than 100 plants left in the wild. [2] 23,420 species of vascular plant have been recorded in South Africa, making it the sixth most species-rich country in the world and the most species-rich country on the African continent.
Z. picta is even more distinctive, being the only truly variegated cycad (having whitish/yellow speckles on the leaves). [7] Like all Zamiaceae, Zamia plants have "coralloid" (coral-shaped) roots which host nitrogen-fixing cyanobacteria. Stems are 3 to 25 centimetres (1.2 to 9.8 in) in diameter, and when arborial, up to 5 metres (16 ft) tall.
The leaves can bleach somewhat if moved from indoors to full sun outdoors. [citation needed] Plant covered with snow. Of all the cycads, C. revoluta is the most popular in cultivation. It is seen in almost all botanical gardens, in both temperate and tropical locations. In many areas of the world, it is heavily promoted commercially as a ...
This is a tall, tree-like cycad plant with a stem that can be upright or lying down, reaching up to 4.5 m (15 ft) in height and 30 and 45 cm (12–18 in) in diameter. Its bright green, feather-like leaves grow in a cluster at the top of the trunk, each leaf being 1–1.5 m (3.3–4.9 ft) long and supported by a 10–20 cm (4–8 in) long stalk ...