The suture is deep and canaliculated, the exterior edge of which is slightly rounded and surrounded by a white band, alternated with fawn-colored blotches.
12.
Lateral walls are filled with fine micro-tubular cavities ( term : canaliculate ) that openinto the chamber interiors, but are sealed externally by a finely agglutinated outer layer.
13.
Petiole canaliculate, winged, d " 15 cm long, d " 1 cm thick, dilated at the base, with a sheath that clasps the stem for 3 / 4 of the circumference.
14.
Apex is acute to acuminate with blunt tip, base is acute to attenuate, coriaceous, glabrous; midrib of the leaf is canaliculate above, stout beneath; secondary nerves usually 5-9 pairs, where lower pairs closer than above ones; tertiary nerves are strongly reticulate on both surfaces.
15.
Leaves simple, opposite, decussate; petiole 0.6-1.5 cm long, canaliculate, sheathing at base, glabrous; lamina 6.5-15 x 3.5-8 cm, usually elliptic, sometimes narrow obovate, apex acute to acuminate, base attenuate; coriaceous or subcoriaceous, glabrous; secondary _ nerves 6-8 pairs; tertiary _ nerves obscure.
16.
Leaves simple, alternate, spiral; stipules foliaceous, 0.7 cm long, caducous and leaving annular scar; petiole ca . 6 cm long, canaliculate, glabrous; lamina to 20 x 8 cm, oblong, elliptic-oblong, apex acuminate, base rounded, coriaceous, margin entire, glabrous and glossy; basally 3-nerved; midrib raised above; secondary nerves 6-10 pairs, prominent and parallel, looped near the margin; tertiary nerves reticulate.
