Amentotaxus argotaenia (Hance) Pilg.

Catkin yew (en)

Species

Gymnosperms > Cupressales > Taxaceae > Amentotaxus

Characteristics

Shrubs or small trees to 7 m. Leafy branchlets ascending or suberect, broadly rectangular to oblong-elliptic in outline, 4.5-8 × 8-15 cm, axis green in 1st year, greenish yellow to yellowish red in 2nd and 3rd years, quadrangular or subterete in cross section. Leaves borne at 45-95° to branchlet axis, subsessile or petiole to 3 mm, dark green adaxially, linear or linear-lanceolate, falcate or ± straight, 2-11 cm × 5-11 mm, leathery, with sclereids, mottled adaxially when fresh, rugose with transverse striations at ca. 90° to midvein when dry, midvein raised adaxially, scarcely so abaxially, 1-1.2 mm wide with a very narrow, indistinct green band 0.15-0.2 mm wide on either side, whole midvein band 1.2-2 mm wide, stomatal bands white, 1-2 mm wide, narrower than marginal bands, of 15-25 rows, marginal bands 1.4-3 mm wide, base cuneate to attenuate, asymmetric, margin flat or very narrowly revolute, apex dark, callose, rounded to sharply triangular, obtuse on basal 1-4 (often more) leaves of each branchlet, often acuminate on others. Pollen-cone racemes borne (1 or)2-4(-10) together, 1.5-6.5 cm; cones in ca. 12 pairs, ovoid, ca. 3.5 × 2.5-3.2 mm; bracts ca. 6 at base of otherwise naked peduncle, distal bract ca. 2.5 × 2 mm, keeled; microsporophylls 6-8, peltate, each with (2 or)3(-5) pollen sacs. Seed-bearing structures with peduncle to ca. 2/3 × length of subtending leaf. Aril bright red when ripe. Seed finally red, narrowly obovoid-ellipsoid, 1.9-2.6 × 1-1.3 cm, with small, mucronulate apex; peduncle 1.1-1.4 cm, compressed-quadrangular, dilated below bracts, naked. Pollination Apr, seed maturity Oct. 2n = 24.
Life form annual
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality dioecy
Pollination anemogamy
Spread -
Mature width (meter) -
Mature height (meter) 6.5 - 7.0
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

A plant of the mid canopy, growing in montane forests, in ravines, on steep slopes or cliffs, on summits and ridges, on a variety of soil types, including limestone, sandstone, shale and granite; at elevations from 600-1,500 metres.
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A plant of the mid canopy, growing in montane forests, in ravines, on steep slopes or cliffs, on summits and ridges, on a variety of soil types, including limestone, sandstone, shale and granite; at elevations from 600-1,500 metres.
Light 4-6
Soil humidity -
Soil texture -
Soil acidity 2-8
Soil nutriment -
Hardiness (USDA) 11-11

Usage

Uses material medicinal oil 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°) -
Size -
Vigor -
Productivity -

Images

Amentotaxus argotaenia unspecified picture

Distribution

Amentotaxus argotaenia world distribution map, present in China and Taiwan, Province of China

Conservation status

Amentotaxus argotaenia threat status: Near Threatened

Identifiers

LSID urn:lsid:ipni.org:names:828260-1
WFO ID wfo-0000530835
COL ID CQZX
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Nageia argotaenia Nageia insignis Podocarpus argotaenia Amentotaxus argotaenia Amentotaxus argotaenia var. cathayensis Cephalotaxus argotaenia

Lower taxons

Amentotaxus argotaenia var. argotaenia Amentotaxus argotaenia var. brevifolia