Macrosolen cochinchinensis (Lour.) Tiegh.

Glabrous or rarely the inflorescence shortly pale-tomentose. Leaves opposite or scattered, the normally developed ones sometimes alternating with cataphylls; lamina narrowly to broadly elliptic or ovate, 4-16 by 2-7 cm, cuneate to truncate at the base to a petiole (1—)3—10 mm long, usually acuminate and acute but sometimes obtuse or shortly rounded at the apex, lustrous above, dull below; venation pinnate with the midrib prominent and the main laterals faintly visible on both sides. Inflorescences at the nodes, a sometimes subumbellate or spicate raceme of 2-7 opposite pairs of flowers; axis slender, 5-20(-40) mm long, subtended at the base by an involucre of 1 or 2 pairs of small broadly triangular bracts; pedicels slender, 0-6 mm long. Corolla in mature bud 6-merous, 8—18(—23) mm long, gradually widened or slightly inflated upwards, weakly winged near the middle, angular, clavate and obtuse or rarely acute at the apex, mostly yellow or green or rarely pink or red below, dark-coloured at the neck and yellow or red above; tube in the open flower 5-10(-14) mm long with the lobes reflexed slightly higher. Anther 0.5-2 mm long, acute, about half to one third as long as the free part of the filament. Fig. 35.