Knema tridactyla Airy Shaw

Species

Angiosperms > Magnoliales > Myristicaceae > Knema

Characteristics

Treelet 2-10 m. Twigs sometimes faintly 2-or 3-angular, 1.5-4 mm diameter, at first with rusty woolly hairs 0.5-1 (-1.5) mm long (subsp. tridactyla), ± late glabrescent, or with inconspicuous scale-like hairs 0.1 mm long or less (subsp. sublaevis), early glabrescent; bark (finely) striate, not tending to crack or flake. Leaves chartaceous or thinly coriaceous, oblong or lanceolate, 7-28 by 2-5.5(-7.5) cm, base cuneate to rounded, apex acute(-acuminate), drying olivaceous or brown above, often glossy and with minute hair scars (lens!); lower surface either with subpersistent greyish stellate hairs 0.3-0.5 mm long, intermixed with stronger dendroid hairs (subsp. tridactyla), or at first with sparse scale-like hairs 0.1 mm long or less, early glabrescent (subsp. sublaevis), surface greyish, not or hardly papillate, with scars of shed coarser hairs; dots absent; midrib much raised above (in subsp. tridactyla towards base with appressed scale-like hairs); nerves 10-23 pairs, flat or sunken above; venation very fine, distinct above; petiole ± late glabrescent, 5-15 by 1.5-3 mm. Inflorescences: peduncle up to 3 mm long, brachyblast simple or 2-or 3-fid, slender or rather thick (worm-like), to 17 mm long, l-2(-2.5) mm thick; in male (2-)4-10-flowered, female 1-5-flowered; flowers with hairs either 0.3-1(-1.5) mm long (subsp. tridactyla & pachydactyla) or (scale-like) 0.1 mm long (subsp. sublaevis)', perianth 3-lobed, pinkish (?) inside. Male flowers: pedicel 1.5-3.5 mm long, bracteole subpersistent, at or above the middle; buds globose to broadly obovoid, 1.5-2 (-2.3) by 1.5-2.5 mm, cleft 3/4-4/5, lobes 0.2-0.5 mm thick; staminal disc flat, circular or faintly triangular, 0.6-1.2 mm diameter; anthers 5-11, partly or completely sessile, 0.2-0.3 mm long, half-erect, not or hardly touching; androphore 0.3-0.7 mm long. Female flowers: pedicel 1.5 mm long, bracteole at or above the middle; buds more or less obovoid, 2-2.5 by 1.5 mm, cleft c. 2/3, lobes 0.2-0.3 mm thick; ovary subglobose, 1 mm diameter, style including stigmas 1-1.5 mm long, the latter 2-lobed and each lobe again ± 2-lobulate. Fruits 1 (or 2) per infructescence, ellipsoid or (ob)ovoid-oblong, 1.4-2 by 0.8-1.6 cm, with hairs either 0.2-0.5 mm long (subsp. tridactyla), or scalelike, 0.1 mm long (subsp. sublaevis); dry pericarp 1-1.5 mm thick; fruiting pedicel 2-3 mm long.
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Growth form tree
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Foliage retention evergreen
Sexuality dioecy
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Mature height (meter) 2.0 - 10.0
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Hardiness (USDA) 10-12

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Cultivation

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Distribution

Knema tridactyla world distribution map, present in Brunei Darussalam and Malaysia

Identifiers

LSID urn:lsid:ipni.org:names:585939-1
WFO ID wfo-0000356754
COL ID 9364L
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR) Link

Synonyms

Knema tridactyla

Lower taxons

Knema tridactyla subsp. pachydactyla Knema tridactyla subsp. salicifolia Knema tridactyla subsp. sublaevis