Cephalotaxus

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Cephalotaxus
Cephalotaxus harringtonia BotGardBln1105WithSeeds.JPG
Cephalotaxus harringtonii
Scientific classification
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Genus:
Cephalotaxus

Type species
Cephalotaxus harringtonii
Species

Cephalotaxus fortunei
Cephalotaxus griffithii
Cephalotaxus hainanensis
Cephalotaxus harringtonii
Cephalotaxus koreana
Cephalotaxus lanceolata
Cephalotaxus latifolia
Cephalotaxus mannii
Cephalotaxus oliveri
Cephalotaxus sinensis
Cephalotaxus wilsoniana

Cephalotaxus, commonly called plum yew or cowtail pine, is a genus of conifers comprising 11 species, treated in either the Cephalotaxaceae, or in the Taxaceae when that family is considered in a broad sense.[1][2] The genus is endemic to eastern Asia, though fossil evidence shows it had a wider Northern Hemisphere distribution in the past;[1] the species are evergreen shrubs and small trees reaching 1.0–10 m (rarely to 20 m) tall.

Description[edit]

The leaves are spirally arranged on the shoots, but twisted at the base to lie in two flat ranks (except on erect leading shoots); they are linear, 4–12 cm long and 3–4 mm broad, soft in texture, with a blunt tip; this helps distinguish them from the related genus Torreya, which has spine-tipped leaves.[2]

The species can be either monoecious or dioecious; when monoecious, the male and female cones are often on different branches; the male (pollen) cones are 5–8 mm long, grouped in lines along the underside of a shoot. The female (seed) cones are single or grouped two to 15 together on short stems; minute at first, they mature in about 18 months to a drupe-like structure with the single large nut-like seed 1.5–4 cm long surrounded by a fleshy covering, green to purple at full maturity. Natural dispersal is thought to be aided by squirrels which bury the seeds for a winter food source; any seeds left uneaten are then able to germinate.[2]

Extant Species[edit]

Image Scientific name Common Name Distribution
Arboretum de Bagnoles - Cephalotaxus fortunei (fruits et feuillage).jpg Cephalotaxus fortunei Chinese plum-yew northern Burma and China
Cephalotaxus griffithii at Reiek.jpg Cephalotaxus griffithii Griffith's plum yew northern India, northern Myanmar and the western Sichuan Province in China.
Cephalotaxus hainanensis Hainan plum-yew Hainan in southern China
Cephalotaxus harringtonii kz1.jpg Cephalotaxus harringtonii Korean plum yew, Japanese plum-yew, Harrington's cephalotaxus, or cowtail pine from Kyūshū in the south to Hokkaidō, Japan
개비자나무.JPG Cephalotaxus koreana Korean plum yew Korea, Japan and northeast China
Cephalotaxus lanceolata Gongshan Plum Yew northern Burma and southern China
Cephalotaxus latifolia Broad-leaved Plum Yew southern China
Cephalotaxus mannii kz2.jpg Cephalotaxus mannii Mann's Yew Plum southern China, northeast India, Laos, northern Thailand, northern Myanmar and northern Vietnam.
Cephalotaxus oliveri - Lyman Plant House, Smith College - DSC01924.jpg Cephalotaxus oliveri Oliver's Plum Yew China and possibly to Thailand, Laos, Vietnam and eastern India.
Cephalotaxus sinensis 1.jpg Cephalotaxus sinensis Chinese Plum Yew central and southern China.
Cephalotaxus wilsoniana kz1.jpg Cephalotaxus wilsoniana Taiwan plum yew, Taiwan cow's-tail pine, and Wilson plum yew Taiwan

References[edit]

  1. ^ a b Tripp, Kim E. (1995). "Cephalotaxus: the plum yews". Arnoldia. 55 (1): 25–39.
  2. ^ a b c Christopher J. Earle (2011). "Cephalotaxus". The Gymnosperm Database. Archived from the original on 30 March 2012. Retrieved 31 March 2012.

External links[edit]