Cephalotaxus wilsoniana

from Wikipedia, the free encyclopedia
Cephalotaxus wilsoniana
Cephalotaxus wilsoniana kz1.jpg

Cephalotaxus wilsoniana

Systematics
Subdivision : Seed plants (Spermatophytina)
Class : Coniferopsida
Order : Conifers (Coniferales)
Family : Cephalotaxus plants (Cephalotaxaceae)
Genre : Cephalotaxus ( Cephalotaxus )
Type : Cephalotaxus wilsoniana
Scientific name
Cephalotaxus wilsoniana
Hayata

Cephalotaxus wilsoniana is a species of plant fromthe head family (Cephalotaxaceae). It isnativeto the island of Taiwan .

description

Cephalotaxus wilsoniana grows as an evergreen tree that can reach heights of up to 9 meters. The scaly trunk bark is pale reddish brown in color. The branches are hanging.

The slightly crescent-shaped needles are linearly shaped with a length of 3 to 4 centimeters and a width of 2.5 to 3 millimeters. The base of the needles is narrow while the point is pointed. The upper side of the needle is dark green and on the underside of the needle there are two grayish white rows of stomata .

The cones are surrounded by a seed coat ( arillus ) and ripen in September. The dark purple, egg-shaped to obovate seeds are about 2.5 centimeters long.

Distribution and location

The natural range of Cephalotaxus wilsoniana includes the northern and central parts of the island of Taiwan .

Cephalotaxus wilsoniana thrives at altitudes of 1400 to 3000 meters. The species grows in mixed and coniferous forests in mountains, where it is mainly found in valleys.

Cephalotaxus wilsoniana is classified as "critically endangered" in the IUCN Red List . The destruction of forests to make them usable for tree plantations is named as the main risk. The total population of the species is considered to be in decline.

Systematics

The first description as Cephalotaxus wilsoniana was in 1914 by Hayata Bunzō in Icones plantarum formosanarum nec non et contributiones ad floram formosanam , Volume 4, page 22. The species is considered by some authors as a subspecies or variety of the Japanese head yew ( Cephalotaxus harringtonia ) or the Chinese head yew ( Cephalotaxus sinensis ). Cephalotaxus wilsoniana is placed in a clade by some authors based on a molecular study carried out in 2008 with Cephalotaxus koreana and treated together with this species as a variety or subspecies of Cephalotaxus harringtonia .

swell

  • Christopher J. Earle: Cephalotaxus wilsoniana. In: The Gymnosperm Database. www.conifers.org, November 23, 2012, accessed December 24, 2013 .
  • Liguo Fu, Nan Li, Thomas S. Elias, Robert R. Mill: Pinaceae . Picea. In: Wu Zhengyi, Peter H. Raven & Hong Deyuan (eds.): Flora of China . Cycadaceae through Fagaceae. Volume 4. Science Press and Missouri Botanical Garden Press, Beijing and St. Louis 1999, ISBN 0-915279-70-3 , Cephalotaxus sinensis var. Wilsoniana , p. 86 ( Cephalotaxus sinensis var. Wilsoniana - online - this printed work is online with the same text).

Individual evidence

  1. ↑ a b c d Christopher J. Earle: Cephalotaxus wilsoniana. In: The Gymnosperm Database. www.conifers.org, November 23, 2012, accessed December 24, 2013 .
  2. ↑ a b c Liguo Fu, Nan Li, Thomas S. Elias, Robert R. Mill: Pinaceae . Picea. In: Wu Zhengyi, Peter H. Raven & Hong Deyuan (eds.): Flora of China . Cycadaceae through Fagaceae. Volume 4. Science Press and Missouri Botanical Garden Press, Beijing and St. Louis 1999, ISBN 0-915279-70-3 , Cephalotaxus sinensis var. Wilsoniana , p. 86 ( Cephalotaxus sinensis var. Wilsoniana - online - this printed work is online with the same text).
  3. ↑ Cephalotaxus harringtonii . Var wilsoniana in the endangered Red List species the IUCN 2013 Posted by: D. Luscombe, Y. Yang, 2010. Accessed December 24, 2013.
  4. ↑ Cephalotaxus wilsoniana at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed December 24, 2013.
  5. ↑ Cephalotaxus wilsoniana. In: The Plant List. www.theplantlist.org, accessed on December 23, 2013 .

Web links

Commons : Cephalotaxus wilsoniana  - Collection of images, videos and audio files