Habitat and Ecology
Molecular Biology and Genetics
Barcode data: Widdringtonia cedarbergensis
Statistics of barcoding coverage: Widdringtonia cedarbergensis
Public Records: 2
Specimens with Barcodes: 2
Species With Barcodes: 1
IUCN Red List Assessment
Red List Category
Red List Criteria
- Needs updating
- 1997Endangered(Walter and Gillett 1998)
Widdringtonia wallichii previously Widdringtonia cedarbergensis (Clanwilliam Cedar or Clanwilliam Cypress) is a species of Widdringtonia native to South Africa, where it is endemic to the Cederberg Mountains northeast of Cape Town in Western Cape Province. It is threatened by habitat loss and protected in South Africa under the National Forest Act (Act 84) of 1998.
It is a small evergreen tree growing to 5–7 m (rarely to 20 m) tall. The leaves are scale-like, 1.5 mm long and 1 mm broad on small shoots, up to 15 mm long on strong-growing shoots, and arranged in opposite decussate pairs. The cones are globose to rectangular, 2–3 cm long, with four scales.
The tree is widely known as the "Clanwilliam Cedar" but botanists have recommended the name Clanwilliam Cypress to better reflect its botanical relationships.
The essential oil derived from leaves contains terpinen-4-ol (36.0%), sabinene (19.2%), γ-terpinene (10.4%), α-terpinene (5.5%) and myrcene (5.5%). The wood oil contains thujopsene (47.1%), α-cedrol (10.7%), widdrol (8.5%) and cuparene (4.0%).
- Farjon, A. (2005). Monograph of Cupressaceae and Sciadopitys. Royal Botanic Gardens, Kew. ISBN 1-84246-068-4
- Hilton-Taylor, C. et al. 1998. Widdringtonia cedarbergensis. Downloaded on 10 July 2007.
- Pauw, C. A. & Linder, H. P. 1997. Widdringtonia systematics, ecology and conservation status. Bot. J. Linn. Soc. 123: 297-319.
- "Protected Trees". Department of Water Affairs and Forestry, Republic of South Africa. 30 June 2013.
- University of the Witwatersrand: Recommended English names for trees of Southern Africa
- Kamatou, G.P.P.; Viljoen, A.M.; Özek, T.; Başer, K.H.C. (2010). "Chemical composition of the wood and leaf oils from the "Clanwilliam Cedar" (Widdringtonia cedarbergensis J.A. Marsh): A critically endangered species". South African Journal of Botany 76 (4): 652. doi:10.1016/j.sajb.2010.04.002.