Characteristics of Chinese Douglas-fir (Pseudotsuga sinensis) in the Wild

Pseudotsuga sinensis
Chinese Douglas-fir (Pseudotsuga sinensis) is a conifer in the genus Douglas fir in the family Pinaceae.

The distribution of Chinese Douglas-fir extends from southern Anhui, Fujian, southwest Guangxi, Guizhou, western Hubei, northern Hunan, northern and southern Jiangxi, Sichuan, northeastern Tibet, Yunnan, and Zhejiang. This tree is also found in Taiwan and northern Vietnam at elevations of 1000 to 2700 m asl.

Pseudotsuga sinensis is classified as Vulnerable on the IUCN Red List. The main cause of extinction is overuse and habitat destruction.

 

There are three varieties of Chinese Douglas-fir, including:

  • Pseudotsuga sinensis var. sinensis
  • Pseudotsuga sinensis var. brevifolia
  • Pseudotsuga sinensis var. gaussenii

 

Characteristics of Chinese Douglas-fir Daun Leaf

Pseudotsuga sinensis Leaf
Source: inaturalist.org/mazus_jan

The leaves are needle-like, 2.5-4 cm long, and 1.5-2 mm wide. The leaf is slightly bent or curved at the base with a toothed or blunt tip and the upper surface is wrinkled. Stomata are arranged in two greenish-white bands on the underside of the leaves, and the upper side is dark green.

The leaf buds are ovate or conical ovate, 4-8 mm long, and 3-4.5 mm in diameter. The shoot scales are triangular, pointed, shiny reddish-brown, and fall off in the second year.

 

Characteristics of Chinese Douglas-fir Fruit

Pseudotsuga sinensis Fruit
Source: inaturalist.org/mazus_jan

Cones are ovoid or oval and 4-6.5 cm long. The cones are reddish at first and then become reddish-brown or brown as they ripen. They remain on the tree for several years before falling.

The seeds are ovoid, 8-12 mm long and 5-8 mm wide, light brown with dark spots, and winged.

 

Characteristics of Chinese Douglas-fir Tree

Pseudotsuga sinensis Tree
Source: inaturalist.org/mazus_jan

Chinese Douglas-fir grows as a large tree up to 50 meters high with a trunk diameter of up to 2 meters. Bark gray rough and very scaly. The branches are spread out and almost vertically above. The crown is round or spreading.

The wood of this tree is used to build bridges, furniture, and wood fiber. The Chinese Douglas-fir tree has been used intensively, so large specimens are rare. Plus, this tree is also difficult to cultivate on a large scale.

Chinese Douglas-fir was first introduced to Europe by Ernest H. Wilson, George Forrest, and Camillo Schneider in the early 20th century, but is rarely cultivated, mostly confined to arboreta and botanical gardens.

 

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