Archidendron cockburnii Nielsen, Opera Bot. 76 (1984)
Named after P.F. Cockburn [1946-?], a British botanist.
Abarema motleyana sensu Kosterm.
Tree to 40 m high; bole to 20 m high, girth c. 100 cm. Bole sometimes fluted or buttressed
at the base. Bark brown, grey or brown with grey patches, with transverse rows of lenticels; inner
bark pale, greenish-yellow; sapwood white or pale yellow; heartwood yellowish. Branchlets angular by ridges decurrent
from the leaf-bases, brownish, dotted by red-brown lenticels, scarcely puberulous. Leaves: rachis 3-16
cm, c. puberulous, with 1-3 glands, narrow and slit-like to narrowly oblong-elliptic, with slightly
raised margin and depressed central part, 2-10 mm; pinnae 1 pair, 6-14 cm, puberulous; petiolules
2-5 mm, puberulous; leaflets 2 or 3 pairs per pinna, opposite, coriaceous(-chartaceous), drying
brown to green-brown, unequal-sided, elliptic-lanceolate or lanceolate, 4-15 by 2-7 cm, base
asymmetrically cuneate, apex acuminate, sometimes mucronulate, upper surface glabrous except
for the scarcely puberulous major veins, lower surface puberulous; principal lateral veins 6-10
per leaflet-half, non-parallel, arching; reticulation lax, raised but hardly visible above, prominent beneath.
Inflorescences terminal, puberulous, consisting of pedunculate glomerules (or umbels) aggregated
into panicles to 30 by 35 cm; glomerules consisting of c. 5 subsessile or sessile flowers,
pedicel up to 1 mm; floral bracts ovate, acute, c. 1 mm, puberulous. Flowers peniamerous, bisexual,
pale yellowish white or cream. Calyx narrowly cup-shaped, 3.5-4.8 mm, densely appressed puberulous
or sericeous; teeth deltoid, acute, 0.3-0.5 mm. Corolla funnel-shaped, 7-11.2 mm, densely
appressed-puberulous or sericeous; lobes triangular-ovate or ovate-elliptic, acute, 2.5-5 mm.
Stamens to 30 mm long, tube equalling or shorter than the corolla-tube. Ovary solitary, puberulous.
Pod ferrugineous or chocolate-brown outside, apricot-red or orange within, spirally contorted, 14-25
by 1.5-2.2 cm, coriaceous-chartaceous, valves only slightly sinuate between the seeds, shortly
tomentose, veins prominulous, dehiscing along both sutures. Seeds black, glossy, ellipsoid, slightly
compressed, 15-16 by 8-12 by 6 mm. [from Flora Malesiana]
Primary and secondary rain forest, riverine forest; on sandy soils; altitude up to 500 m.
Borneo: Kelensa butoh kra.