Schismatoglottis niahensis A.Hay

Robust herb c. 70 cm tall. Stem erect, suckering, pleionanthic, to c. 30 cm tall × 5 cm diam.; internodes c. 2 cm long. Leaves few together; petiole c. 40 cm long, sheathing in the lower ⅓–⅔; wings of sheath tapering, fully attached; blade sagittate, mid-green adaxially, paler below, 28–35 cm long × 13–22 cm wide, widest at or near base, the base cordate with rounded posterior lobes 7–9 cm long; midrib flush with the lamina (dry), stout and broad, with c. 13 rather stout, adaxially pale green primary lateral veins on each side, irregularly alternating with lesser interprimaries, sometimes branched especially in the lower part of the anterior lobe, diverging at c. 70° and almost straight for most of the way to the margin before deflecting distally; secondary venation rather obscure adaxially and abaxially, arising from the midrib and the primary veins; tertiary venation obscure. Inflorescences to 4 together, subtended by short cataphylls except the first subtended by a cataphyll reaching to half way along the spathe and bearing a reduced petiole and blade; peduncle 13–15 cm long. Spathe 11–15 cm long; lower spathe 4–5.5 cm long, narrowly ovoid, differentiated from the limb by a sharp constriction; limb ovate, 7–10 cm long, slightly inflated over the appendix, finally acuminate for c. 2 cm, caducous. Spadix c. 9 cm long, narrowly hourglass-shaped; female zone 3.8 cm long, adnate to the spathe in the lower 1.2 cm, c. 8 mm diam. in the middle, distally conoid and apically 3 mm diam.; pistils crowded, narrowly cylindric (especially near the base of the female zone — distally somewhat lower and thicker) c. 0.5 mm diam.; stigma sessile, button-like, about the same diameter as the ovary; interpistillar staminodes scattered among the pistils, more crowded in the distal part of the female zone, long-stalked, apically abruptly clavate and flat-topped, c. 1.5 times the height of the ovary; sterile interstice 2–3 mm long, slightly obconic, 3–4 whorls of sterile stamens drying very dark brown, lying level with the mouth of the lower spathe; male zone obconic, c. 2.8 cm long, distally c. 1 cm diam.; stamens densely crowded, c. 0.5 mm across, dumbbell-shaped with large round pores and the connective slender and raised into a short broadly triangular point somewhat offcentre; appendix more or less bullet-shaped, at the base slightly but abruptly wider than the top of the male zone, c. 1.2 cm diam., then somewhat tapering and finally obtuse; staminodes of appendix columnar, flat-topped and irregularly polygonal with rounded angles, c. 0.5 mm diam. Infructescence unknown.