Shrub to 1.5-4 m tall. Stem glabrous. Stipules 4-7 cm long, glabrous, upper ones subpersistent. Petiole (0.5-)1-4.5 cm long, glabrous, vaginate to apex, margin enlarged; blade not scabrous, densely glandular-dotted below, narrowly elliptic to elliptic-ovate, 16-27 x 7-13(-14.5) cm, margin ciliolate, apex acuminate, base equal or unequally attached to petiole difference 0-0.3 cm, obtuse to rounded, glabrous, but veins sparsely to densely appressed or crisp-pubescent below; pinnately veined, secondary veins 6-7 per side, originating from lower 2/3 of primary vein, flat above, prominulous below, lower 2-3 ascending horizontally or at an angle of 45º, upper ones ascending near margin but hardly anastomosing towards top, tertiary veins reticulate and transverse between secondaries. Inflorescence erect; peduncle 1-2 cm long, glabrous; spike 7-9.5 cm long, greenish white to white, apiculate; floral bracts subtriangular, densely marginally fringed. Infructescence to 11.5 cm long; fruits trigonous or ovoid, glabrous, verruculose, stigmas 3, recurved, sessile.