Biology:Cyathea capensis
| Cyathea capensis | |
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| Slender, adult Cyathea capensis ssp. capensis specimens, growing in typical shady Afromontane forest in Cape Town. | |
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| Species: | C. capensis
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| Cyathea capensis (Linnaeus fil.) J. E. Smith, 1793
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Cyathea capensis (known as the "Forest tree fern") is a regionally widespread and highly variable species of tree fern. It is indigenous to Southern Africa (subsp. capensis) and South America (subsp. polypodioides).[1][2]
Description
Cyathea capensis (both subspecies) has a slender, erect trunk, that is up to 4.5 metres (15 ft)tall (occasionally even 6 metres (20 ft)) and about 15 cm in diameter.[3]
The fronds are tripinnate, born on long stipes (stalks), and 2–3 m in length. The main stem of the leaf (rachis) is smooth to slightly warty and covered in scales that range from tan to brown or dark brown. The frond stalks are covered with dark brown or black scales.
The smallest leaflets (pinnae) have toothed (serrated) margins. The lowest pinnae may be separated from the others along the rachis and form a clump around the crown, similar to the "wig" of Cyathea baileyana. This moss-like tuft of tiny, reduced leaves is distinctive for Cyathea capensis, and can be used to identify this species across its range.[4][5]
The sori occur in two rows, one along each side of the pinnule midvein, and are covered by scale-like indusia.
Distribution
This fern is the only member of the family Cyatheaceae native to both Africa and the Americas. The species is divided into two subspecies:
- Cyathea capensis subsp. capensis
Cyathea capensis subsp. capensis is native to the Old World tropics in Africa. It is found in Malawi, Mozambique, Tanzania, Swaziland, Zimbabwe, and South Africa (from the Western Cape province to KwaZulu-Natal and Mpumalanga).
It grows in cool, shady, moist forest, beside rivers and waterfalls. It is found at altitudes of 360–1,820 metres (1,180–5,970 ft). The specific epithet capensis refers to the Cape of Good Hope in South Africa, where the type specimen was collected.
- Cyathea capensis subsp. polypodioides
Cyathea capensis subsp. polypodioides is native to the New World tropics in South America.
It is endemic to southeastern Brazil in montane Atlantic Forest habitats, at altitudes of 900–2,000 metres (3,000–6,600 ft).
Cultivation
Cyathea capensis is cultivated as an ornamental plant.[6] It is relatively easy to grow if provided with a semi-shady, moist and sheltered environment, and can likely tolerate several degrees of frost.[6]
References
- ↑ "IPNI Plant Name Details". http://www.ipni.org/ipni/plantsearch?id=17072190-1&query_type=by_id&output_format=object_view&back_page=plantsearch&ret_wholeName=Cyathea%20capensis.
- ↑ Braggins, John E. & Large, Mark F. 2004. Tree Ferns. Timber Press, Inc., pp. 109–110. ISBN:0-88192-630-2
- ↑ Ferns of Africa - Cyathea capensis
- ↑ Edwards, Peter. 2005. Cyatheaceae. Flora of Tropical East Africa. p.14.
- ↑ (Distinguishing Cyathea capensis and Cyathea cooperi)
- ↑ 6.0 6.1 Cold-Hardy Tree Ferns: Cyathea capensis
Wikidata ☰ Q5197531 entry
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