Knema rigidifolia J.Sinclair

Species

Angiosperms > Magnoliales > Myristicaceae > Knema

Characteristics

Tree 5-15 m. Twigs 2-4(-5) mm diameter, smooth or striate, at first with hairs 0.1-0.2 mm long, glabrescent; bark smooth or striate, not tending to crack or flake. Leaves coriaceous, (oblong-)lanceolate, base attenuate, rounded, cordate, or subtruncate, apex subobtuse or acute-acuminate, 12-28 by 4-8.5 cm, drying brown, with scattered hair scars above; lower surface late glabrescent or with subpersistent scale-like hairs 0.1 mm long or less, sometimes mixed with weak stellate-dendroid hairs 0.1-0.2 mm long; dots (almost) absent; midrib hardly raised above; nerves 15-28 pairs, ± flat, venation raised and distinct; petioles 15-25 by 2-4 mm. Inflorescences: sessile, brachyblast simple or warted, up to 5 mm diameter; in male 5-20-flowered, female 1-5-flowered; flowers with rusty hairs 0.1-0.2 mm long; perianth 3-lobed, reddish (?) inside. Male flowers: pedicel 3-5 mm, slender or thickish, 0.5(-l) or 1.5-2 mm diameter, bracteole caducous, about median; buds depressed broadly obovoid, variable in size and consistency (see under the subspecies), 3.5-4 by 4-4.5 mm, cleft 3/4-4/5, lobes 0.5 or 1-1.5 mm thick; staminal disc circular, ± concave, 1.7-2.2 mm diameter; anthers 8 or (12?—)14—16 (see the subspecies), half-sessile, 0.5-0.7 mm long, suberect, not or hardly touching; androphore tapering, 1-1.4 mm long. Female flowers not known. Fruits 1 (or 2?) per infructescence, almost globose, 3-4 cm diameter, with hairs 0.2 mm long; dry pericarp 2-4 mm thick; fruiting pedicel 1-3 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) 5.0 - 15.0
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Environment

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Hardiness (USDA) 9-12

Usage

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Cultivation

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Distribution

Knema rigidifolia world distribution map, present in Malaysia

Identifiers

LSID urn:lsid:ipni.org:names:585922-1
WFO ID wfo-0000356756
COL ID 6NLY8
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR) Link

Synonyms

Knema rigidifolia

Lower taxons

Knema rigidifolia subsp. camerona