Cephalotaxus griffithii

Cephalotaxus griffithii is a species of the family head Yews ( Cephalotaxaceae ). It is located in eastern India, southern China and northern Myanmar home. The most similar to Cephalotaxus mannii and is therefore also frequently used as a synonym of that viewed.

Description

Cephalotaxus griffithii growing as evergreen tree that can reach heights of growth of up to 20 meters and diameter at breast height of 0.5 to 1.1 meters. The light brown to reddish brown Stammborke flakes. The 8 to 24 centimeters long and 4.5 to 9.5 centimeters thick branches are elliptically shaped in cross-section to oblong - elliptical.

The relatively thin or leathery, straight or slightly sickle-shaped needles are linear shaped with a length of 5 to 7.5 centimeters and a width of about 3 millimeters to linear-lanceolate. You are at a 0-1 mm long stalk and go at an angle of 45 to 80 ° from the branches off. The symmetric or asymmetric base of the needles is blunt to blunt - wedge-shaped, while the tip sharply pointed, is rarely mucronate. The needle edges are bent back. The Needles are dark green or olive-green and glossy on the needle base you will find 19 to 26 white to bluish white Stomatareihen.

The heyday of Cephalotaxus griffithii extends from November to March, and the seeds ripen from August to October. The pale-yellow, male cones are spherical shaped with a diameter of 4 to 4.5 millimeters and are occasionally on a 1 to 5 millimeters long stem. They are in groups of six to eight and each contain seven to 13 Mikrosporophylle, each with three to four pollen sacs. The female cones have a 0.6 to 1 centimeter long stem and are available individually or in groups of two to three. You are from a 2.2 to 3 centimeters long and 1.1 to 1.2 centimeters thick seed coat ( aril ) surrounding it. This is initially green and turns to maturity towards red. The inverted - ovate to obovate - elliptical seeds are 2.2 to 2.8 inches long and have a sharply pointed tip or stachelspitzige.

The chromosome number is 2n = 24

Distribution and location

The natural range of Cephalotaxus griffithii is located in eastern India, southern China and northern Myanmar. In India, it includes lying in Arunachal Pradesh Mishmi Mountains, and the states of Manipur and Nagaland. In China, you can find the kind in western Sichuan.

Cephalotaxus griffithii thrives in India at an altitude of around 1830 meters.

Cephalotaxus griffithii is not listed in the IUCN Red List, but viewed as a synonym of Cephalotaxus mannii. This species is classified as "endangered". The main danger, the conversion of forests to farmland and timber felling are mentioned together with the slow regeneration rate. The total number of species is declining.

System

The first description as Cephalotaxus griffithii in 1888 by Joseph Dalton Hooker in The Flora of British India, Volume 5 (15 ), page 648 The specific epithet honors the griffithii British botanist William Griffith. The species is treated by some authors because of the small morphological differences as a synonym of Cephalotaxus mannii.

Swell

• Christopher J. Earle: Cephalotaxus griffithii. In: The Gymnosperm Database. www.conifers.org, November 23, 2012, accessed on 23 November 2013 ( English).
• 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 in 1999, ISBN 0-915279-70-3, Cephalotaxus mannii, p 87 ( this printed work is the same text online, Cephalotaxus mannii - Online).