Aporosa antennifera (Airy Shaw) Airy Shaw, Kew Bull., Addit. Ser. 4 (1975)
Latin for 'antenna-like'.
Aporosa nigropunctata var. antennifera Airy Shaw
Mid-canopy tree up to 31 m tall and 41(-60) cm dbh. Stipules dropped early.
Leaves alternate, simple, penni-veined, glabrous. Flowers ca. 0.5 mm in
diameter, yellow, placed in racemes. Fruits ca. 17 mm long, yellow, dehiscent
capsule, exposing seed with orange-red aril when open.
Shrub or tree, up to 30 m high, up to 60 cm diameter. Bark dark, reddish, pinkish brown, dark to
light grey, with reddish patches, smooth, cracked, or slightly rugose; inner bark dark, reddish to
light orangish, or yellowish brown to pale pink, firmly fibrous. Wood yellow to white, hard, finely
radially striate. Young branches dark brown sparsely puberulous, hairs brown pilose. Stipules not
seen, early caducous. Petiole terete, adaxially lowly grooved, 4-8 by 1-1.2 mm, sparsely puberulous,
lower pulvinus 0.7-1 by c. 1 mm, indistinct, upper pulvinus 2-3 by 1-1.2 mm, distinct. Leaves
narrowly ovate to narrowly elliptic, 6.5-14 by 2.2-6 cm; base cuneate to slightly attenuate, basal
glands absent; margin lowly undulate to irregularly glandular-crenate, marginal glands regular,
distinct, blackish, hairy in young leaves; apex cuspidate; blade thinnish, smooth, dull, not
brittle, drying (dark) greenish blue above, greyish brown beneath, glabrous above, only midrib and
nerves sparsely puberulous beneath; dots irregularly laxly set, very fine, black, often indistinct;
disc-like glands absent. Nervation: midrib slightly prominent to flat above, prominent beneath;
nerves 4-6 pairs, slightly prominent to flat above, prominent beneath, marginal arches often rather
fading, 0.5-1.5 mm from the margin; tertiary veins and venation distinct, densely reticulate,
slightly scalariform, flat above, slightly prominent beneath. Inflorescences axillary or just below
the leaves. Staminate inflorescences 2-5 clustered together, 9-25 by 1-1.3 mm, sparsely puberulous;
peduncle 0.5-2 by 0.2-0.4 mm; bracts broadly triangular, inconspicuous, 0.2-0.3 mm long, sparsely
hairy outside, glabrous inside; glomerules subglobose, consisting of 5-8 laxly set flowers, 0.7-1.2
by c. 0.5 mm, spaced at 0.1-1 mm at base of rachis, decreasing to 0 mm at apex; pedicel absent.
Staminate flowers 1-1.5 mm long; sepals 4, obovate, connate at base, 0.3-0.5 mm long, sparsely hairy
outside, glabrous inside; stamens 2, 1-1.5 mm long, exserted; anthers 0.2-0.3 mm long, connective
glabrous; pistillode absent. Pistillate inflorescences 1-3 clustered together, 5-13 by 0.5-1 mm,
puberulous; flowers up to 7, laxly set along the rachis; bracts broadly triangular, 0.3-0.5 mm long,
very sparsely hairy outside, glabrous inside, ciliate; bracteoles ovate, 0.3-0.4 mm long, glabrous,
ciliate; pedicel 1-3 mm long, puberulous. Pistillate flowers 3-4 mm long; sepals 4, ovate, subequal,
patent, 0.3-0.8 mm long, thin, sparsely hairy outside, glabrous inside; ovary flask-shaped to
slightly fusiform, 2-locular, 3-3.5 mm long, punctulate, sparsely puberulous at base, glabrescent
towards apex; stigmas raised, elongated, apically bifid to c. halfway, lobes divided, perpendicular
to the sides of the ovary, recurved, 2.5-5.5 mm long, papillate above, glabrous, lowly papillate
beneath, style remnant absent. Infructescences 9-23 by 0.8-1 mm, sparsely puberulous; fruiting
pedicel 2-4 mm long, sparsely puberulous. Fruits ellipsoid, shortly stiped, beaked, 7-10(-15) by
5-8 mm, punctulate to smooth, sparsely hairy at base, glabrescent; pericarp 0.5-0.8 mm thick, not
fleshy; septae and column glabrous. Seeds 1 (or 2), half-terete, ellipsoid, 7-8 by 4-5 by c. 2 mm.
[from Flora Malesiana: http://www.nationaalherbarium.nl/Euphorbs/specA/AporosaT.htm]
Primary, secondary, or logged dipterocarp forest; on hill sides, ridges, and along rivers. Soil:
clay, sandy loam, granitic sand, or basalt, yellow-red brownish or greyish. Altitude: 20-1600 m.
Peninsular Malaysia, Sumatra, Borneo.
Borneo Kasingan tahatung, Kayu masam, Manyi, Pembaras pipit.
Peninsular Malaysia Semasam lanang, Kelat jambu (Malay).
Sumatra Bangka rambei.