Bucephalandra elliptica (Engl.) S. Y. Wong & P. C. Boyce

Small solitary obligate rheophytic herbs to 20 cm tall. Stem creeping and rooting with active portion sub-erect, c. 1.3 cm in diam. Leaves c. 6 to gether; petiole 5 - 6 cm long × c. 2 mm in diam., adaxially canaliculate, medium green, sheathing at extreme base, wings extended into a very narrowly triangular ligular portion to 3 cm long; blade lanceolate, rather oblique, 9 - 13 cm long × 3 - 4 cm wide, somewhat coriaceous, semi-glossy medium green adaxially, paler green abaxially with darker green veins, base rounded, apex acuminate, apiculate for c. 2.5 mm, margin undulate, quite strongly so in larger individuals; midrib abaxially and adaxially prominent; primary lateral and interprimary veins not differentiated, together amounting to c. 8 per side, diverging at c. 30° and running to a marginal vein; secondary venation adaxially ± obscure, abaxially fine; tertiary venation adaxially obscure, abaxially forming a faint tessellate reticulum. Inflorescence solitary; pe duncle fairly stout, exceeding petioles, 6 - 10 cm long × c. 2 mm in diam., terete, dull medium green. Spathe oblong-ovate, not constricted, c. 6 cm long; lower spathe narrowly funnel-form, bright green, shading to yellow, persistent; limb inflating, producing a slit near tip, then crumbing-caducous, glossy white, rostrate for c. 1.5 cm, and apiculate for c. 2 mm, apiculum green. Spadix 2 - 3 cm long; pistillate zone c. 7 - 9 mm long × 3 - 4 mm wide, with c. 3 spirals of pistils; pistils dense, rhomboidal-cylindric, c. 0.5 mm in diam., limegreen; stigma sessile, umbonate, c. ½ diameter of ovary, impressed with edges of pistil forming a raised rim, papillate and with a conspicuous stigmatic droplet at anthesis; pistillodes lorate-clavate, c. 1.5 mm long, glossy white; interstice with 2 rows of scale-like staminodes, these c. 2 mm long × c. 2 mm wide, ventrally with median-line swollen and distally somewhat spathulate, pale creamy white with claw green; staminate zone 1 - 1.5 cm long × 1 - 1.5 cm in diam., consisting of 5 - 7 rows of flowers; staminate flowers upward-directed during pistillate anthesis, reflexing to almost perpendicular with spadix axis during staminate anthesis, creamy white; stamen large, c. 2 mm across × c. 1.5 mm tall; filament short; connective triangular-prismatic; thecae inserted ventrally, gibbose-ellipsoid, c. 1 mm long × c. 0.5 mm wide, smooth; thecae horns c. ¼ length of associated theca, setaceous, upward-curved; appendix bluntly cylindrical to fusiform, 2 - 3 cm × 1 - 1.7 cm in diam., cream; appendix staminodes irregularly rhombic-cylindric, lowermost in groups of 3, truncate, 0.5 - 1 mm in diam., top surface papillate. Fruiting spathe widely and shallowly funnel-form, c. 1 cm in diam. × c. 1.5 cm tall; fruits and seeds not seen.