Anthurium acutissimum Engl.

Epiphytic, epilithic or terrestrial; stem short, 3-4(10) cm diam.; roots forming a dense mass, descending, drying whitish gray, somewhat pubescent, elongate, 2-4 mm diam.; cataphylls linear-lanceolate, (7)12- 17 cm long, linear-elongate, drying brown to reddish brown, persisting semi-intact or as coarse linear fibers or as a reticulum of fibers. LEAVES spreading to pendent; petioles (7.5)20-50 cm long, 5-12 mm diam., terete to subterete, somewhat flattened adaxially, rounded abaxially, surface pale-speckled; geniculum flattened, slightly darker and thicker than petiole when dried, 1-2 cm long; blades usually pendent, coriaceous, oblong to oblong-elliptic, acuminate at apex, acute to narrowly acute at base, 60- 118 cm long, 7.5-14 cm wide, broadest at or near the middle, the margins flat; upper surface matte, semivelvety, lower surface glossy, both surfaces dark to medium green, drying green to yellowish green, matte; midrib convexly raised, paler than surface above, prominently convex, much paler than surface below; primary lateral veins numerous, more than 25 per side, departing midrib at 50-70° angle, straight to the collective vein, flat and pale above, obscure below, slightly raised above when dried, more so below; interprimary veins moderately numerous, drying almost as conspicuous as primary lateral veins, raised above and below; tertiary veins obscure; collective vein arising from near the base, weakly raised above and below when dried, equally as prominent as primary lateral veins, 4-17 mm from margin. INFLORESCENCES spreading to pendent; peduncle 22-64 cm long, (2)3-4 mm diam., equally or to 1.7 x as long as petiole, terete; spathe spreading, subcoriaceous, green to green-tinged with purple at margins, oblong-lanceolate, (5.5)8-21 cm long, 1.1-2.4 cm wide, broadest near the base, acuminate at apex (the acumen inrolled, to 25 mm long), acute at base; stipe 7-20 mm long in front, 0-4 mm long in back; spadix green to yellow-green, subsessile, erect, straight to curved, held at 160-180° angle from peduncle, (6.5)10.5-2 1.5 cm long, (3)6-8 mm diam. near base, (2)4-5 mm diam. near apex, broadest at the base; flowers square to rhombic, 2.2-2.8 mm in both directions, the sides smoothly sigmoid, (3)4-5 flowers visible in principal spiral, 6-9 in alternate spiral; tepals matte, pale-punctate when dried; lateral tepals 1.3- 2 mm wide, the inner margins convex, becoming turned up against the pistil, the outer margins 2- sided; pistils emergent, raised, same color as tepals; stigma slitlike, becoming ellipsoid, 0.5-0.8 mm long; stamens emerging from the base, held well above the tepals, persisting, laterals emerging almost to apex before the alternates emerge in basal third, held in a circle around the pistil; filaments white, flattened, exserted, 0.7-1 mm long, 0.6- 0.7 mm wide; anthers drying yellowish to brown, 0.5-0.8 mm long, 0.4-0.7 mm wide; thecae oblong, not divaricate. INFRUCTESCENCE pendent; spathe persisting, green or withered; spadix ca. 23-30 cm long, 2 cm diam., with berries scattered throughout; berries yellow-orange becoming orange, ovoid to broadly ellipsoid, "hollow" when rehydrated, acute at apex, (6)8.6-9.5 mm long, 4-4.5 mm diam.; pericarp thickened, with some raphide cells; seeds 2 per berry, yellowish, oblong-ovoid, flattened, 3.7-4.8 mm long, 2.3-2.4 mm diam., 1.3-1.6 mm thick, with a transparent, gelatinous appendage at both ends.