Amentotaxus yunnanensis H.L.Li

Yunnan catkin yew (en)

Species

Gymnosperms > Cupressales > Taxaceae > Amentotaxus

Characteristics

Trees to 15 m tall; trunk to 25 cm d.b.h.; main branches spreading to form a broad, ovoid crown. Leafy branchlets ascending, broadly oblong-ovate in outline, ca. 8 × 12 cm, axis green in 1st year, thereafter light yellow to light yellowish brown, ridged. Leaves borne at ca. 60° to branchlet axis, subsessile, linear, linear-lanceolate, or linear-elliptic, usually straight, sometimes slightly falcate distally, 3.5-10(-15) × 0.8-1.5 cm, thick and leathery, midvein prominently raised adaxially, 1-2 mm wide abaxially, stomatal bands brown or pale yellowish white when dry, 3-4 mm wide, at least 2 × as wide as marginal bands, very dense, in ca. 40 rows, marginal bands 1.5-2 mm wide, base broadly cuneate or obtuse, margin slightly downcurved, apex obtuse on basal 1-3 leaves of each branchlet, tapered on others. Pollen-cone racemes borne 4-6 together, 10-15 cm; bracts 16-20 in 4 rows of 4(or 5), keeled, distal bract 8-9 × 4-5 mm; pollen sacs (4-)6 or 7(or 8). Aril reddish purple when ripe, slightly white powdery, 2.2-3 × 1.4-1.5 cm. Seed ellipsoid, shortly beaked at apex; peduncle ca. 1.5 cm, relatively thick, flattened proximally but quadrangular distally. Pollination Apr, seed maturity Oct.
Life form annual
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality dioecy
Pollination anemogamy
Spread -
Mature width (meter) -
Mature height (meter) 15.0
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

An understorey tree, occasionally growing larger and becoming a canopy tree, scattered in mixed evergreen and deciduous broad-leaved forests; at elevations from 800-1,600 metres.
More
An understorey tree, occasionally growing larger and becoming a canopy tree, scattered in mixed evergreen and deciduous broad-leaved forests; at elevations from 800-1,600 metres.
Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) -

Usage

Uses medicinal oil timber wood
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by cuttings or seedlings. Seeds needs scarification.
Mode cuttings seedlings
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment scarification
Minimum temperature (C°) -
Optimum temperature (C°) -
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Vigor -
Productivity -

Images

Amentotaxus yunnanensis unspecified picture

Distribution

Amentotaxus yunnanensis world distribution map, present in China

Conservation status

Amentotaxus yunnanensis threat status: Vulnerable

Identifiers

LSID urn:lsid:ipni.org:names:828263-1
WFO ID wfo-0000530841
COL ID CR25
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Amentotaxus yunnanensis Amentotaxus argotaenia var. yunnanensis