Keteleeria davidiana is a coniferous evergreen

Evergreen

In botany, an evergreen plant is a plant that has leaves in all seasons. This contrasts with deciduous plants, which completely lose their foliage during the winter or dry season.There are many different kinds of evergreen plants, both trees and shrubs...

 tree

Tree

A tree is a perennial woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance. A minimum height specification at maturity is cited by some authors, varying from 3 m to...

 native to Taiwan

Taiwan

Taiwan , also known, especially in the past, as Formosa , is the largest island of the same-named island group of East Asia in the western Pacific Ocean and located off the southeastern coast of mainland China. The island forms over 99% of the current territory of the Republic of China following...

 and southeast China

China

Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

, in the provinces of Gansu

Gansu

' is a province located in the northwest of the People's Republic of China.It lies between the Tibetan and Huangtu plateaus, and borders Mongolia, Inner Mongolia, and Ningxia to the north, Xinjiang and Qinghai to the west, Sichuan to the south, and Shaanxi to the east...

, Guangxi

Guangxi

Guangxi, formerly romanized Kwangsi, is a province of southern China along its border with Vietnam. In 1958, it became the Guangxi Zhuang Autonomous Region of the People's Republic of China, a region with special privileges created specifically for the Zhuang people.Guangxi's location, in...

, Guizhou

Guizhou

' is a province of the People's Republic of China located in the southwestern part of the country. Its provincial capital city is Guiyang.- History :...

, Hubei

Hubei

' Hupeh) is a province in Central China. The name of the province means "north of the lake", referring to its position north of Lake Dongting...

, Hunan

Hunan

' is a province of South-Central China, located to the south of the middle reaches of the Yangtze River and south of Lake Dongting...

, Shaanxi

Shaanxi

' is a province in the central part of Mainland China, and it includes portions of the Loess Plateau on the middle reaches of the Yellow River in addition to the Qinling Mountains across the southern part of this province...

, Sichuan

Sichuan

' , known formerly in the West by its postal map spellings of Szechwan or Szechuan is a province in Southwest China with its capital in Chengdu...

, and Yunnan

Yunnan

Yunnan is a province of the People's Republic of China, located in the far southwest of the country spanning approximately and with a population of 45.7 million . The capital of the province is Kunming. The province borders Burma, Laos, and Vietnam.Yunnan is situated in a mountainous area, with...

. The tree is restricted to hills, mountains, and valleys at elevations of 200-1500 m. Generally, it grows in regions with a more continental climate

Continental climate

Continental climate is a climate characterized by important annual variation in temperature due to the lack of significant bodies of water nearby...

 than the other two Keteleeria species.

The tree reaches 40-50 m in height, developing an irregular oblate crown with large branches. The branchlets have a dense covering of stiff hairs. The bark

Bark

Bark is the outermost layers of stems and roots of woody plants. Plants with bark include trees, woody vines and shrubs. Bark refers to all the tissues outside of the vascular cambium and is a nontechnical term. It overlays the wood and consists of the inner bark and the outer bark. The inner...

 is dull brown to dark gray-black, and is scaly or flaky. The leaves

Leaf

A leaf is an organ of a vascular plant, as defined in botanical terms, and in particular in plant morphology. Foliage is a mass noun that refers to leaves as a feature of plants....

 are needle-like, 2-6.4 cm long by 3.6-4.2 mm broad. They are flat, stiff, and dark shiny green. The cones

Conifer cone

A cone is an organ on plants in the division Pinophyta that contains the reproductive structures. The familiar woody cone is the female cone, which produces seeds. The male cones, which produce pollen, are usually herbaceous and much less conspicuous even at full maturity...

 are light brown, cylindrical, and stand erect on the branches. They are 8-20 cm long and 4-5 cm broad with a stalk 2.5-3.2 cm long. The winged oblong seed

Seed

A seed is a small embryonic plant enclosed in a covering called the seed coat, usually with some stored food. It is the product of the ripened ovule of gymnosperm and angiosperm plants which occurs after fertilization and some growth within the mother plant...

s, which mature in October or November, are 13 mm long with a glossy brown wing 12-19 mm long.

Three varieties of the species exist:

• Keteleeria davidiana var. calcarea. Guangxi and Guizhou on calcareous mountains. First-year branchlets yellow. Apices of seed scales blunt and rounded. Winter buds globular.
• Keteleeria davidiana var. davidiana. First-year branchlets yellow-gray or light-gray. Apices of seed scales narrowed. Winter buds ovoid.
• Keteleeria davidiana var. formosana. Endemic on Taiwan, at 300-900 m. Dark leaf scars protruding noticeably on branches. Leaves 2-4 cm long.

The wood is soft and white yellow, and is used for construction, bridges, furniture, and wood fiber.

External links

• Gymnosperm Database
• Flora of China