Pseudotsuga sinensis Dode

Chinese douglas-fir (en), Douglas de Chine (fr)

Species

Gymnosperms > Pinales > Pinaceae > Pseudotsuga

Characteristics

Trees to 50 m tall; trunk to 1 m d.b.h.; bark gray or dark gray, irregularly and thickly scaly; branchlets initially pale yellow or yellowish gray, aging gray, usually glabrous or slightly pubescent on main branchlets and densely pubescent on lateral branchlets. Leaves pectinately arranged, linear, (1.3-)2-2.5(-3) cm × ca. 2 mm, stomatal bands abaxial, whitish or gray-green, base broadly cuneate, apex emarginate. Seed cones pale purple, glaucous, maturing purplish brown, ovoid to ellipsoid-or conical-ovoid, 3.5-8 × 2-4.5 cm. Seed scales at middle of cones semiorbicular, flabellate, or reniform, 2.5-3 × 3.2-4.5 (-5) cm, rusty brown pubescent abaxially, base broadly cuneate or almost truncate, concave at sides. Bracts reflexed, cusp narrowly triangular, ca. 3 mm, apex obtuse. Seeds irregularly brown spotted abaxially, triangular-ovoid, slightly depressed, densely rusty brown pubescent adaxially; wing obliquely ovate or semitrullate. Pollination Apr, seed maturity Oct-Nov.
Life form annual
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality monoecy
Pollination anemogamy
Spread -
Mature width (meter) -
Mature height (meter) 40.0
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Hills, mountains, evergreen broad-leaved forests, usually in small stands; at elevations from 600-2,800 metres, occasionally to 3,300 metres.
Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) -

Usage

Uses fiber material timber wood
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by seedlings. Seeds needs stratification.
Mode seedlings
Germination duration (days) 30 - 180
Germination temperacture (C°) 23
Germination luminosity light
Germination treatment stratification
Minimum temperature (C°) -8
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Pseudotsuga sinensis unspecified picture

Distribution

Pseudotsuga sinensis world distribution map, present in China and Taiwan, Province of China

Conservation status

Pseudotsuga sinensis threat status: Vulnerable

Identifiers

LSID urn:lsid:ipni.org:names:677145-1
WFO ID wfo-0000478196
COL ID 78HD2
BDTFX ID 81460
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Pseudotsuga sinensis Pseudotsuga taitoensis

Lower taxons

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