Sindora irpicina
Description
Tree up to 40 m high and 80 cm in diam.
Leaves (3-)5- jugate; petiole 2.3-3.8 cm and rachis 7.5-19.5 cm long, slightly puberulous, glabrescent, or almost glabrous.
Stipules caducous, not seen.
Inflorescences paniculate, up to 16 cm long, lateral branches straight, 1-4 together, up to 4.5 cm long, both rachis and branches pubescent; bracts and bracteoles usually not present on dry specimens, rarely bracteoles observed on young flowers, lanceolate, up to c. 3 mm long, densely puberulous; pedicels 3-5 mm, densely puberulous.
Petal ovate, 5 by 3 mm, deeply concave to involute, outside densely puberulous in the lateral parts, inside glabrous, margin villose.
Stamens: united basal parts of the filaments c. 1 mm high; free filaments and staminodes up to c. 10 mm, sparsely hairy in the lower half; anthers 2 (perfect) largest, ellipsoid, c. 0.35 mm long, the others much smaller.
Ovary subsessile or very shortly stiped, ovate, c. 4 mm long, densely woolly, with many minute outgrowths, 3-5-ovuled; style up to c. 14 mm, involute or recurvate, hairy at the basal part; stigma small.
Seeds broadly suborbicular, c. 1.8 cm long and wide, smooth, on top of a large, reniform aril (c. 3 by 1.5 cm).
Distribution
Asia-Tropical: Borneo (Brunei present, Kalimantan present, Sabah present, Sarawak present)
Malesia: Borneo (Brunei, Sarawak, Sabah, Kalimantan).
Morphology
The present species can be easily recognized by 1) leaves 3-5-jugate, 2) leaflets glabrous above, 3) ovary densely woolly, with many minute outgrowths (to be observed with the dissecting microscope), 4) pods bearing scattered, evenly disposed spines, and 5) the seed on a large, reniform aril.