Anthurium oerstedianum Schott

Terrestrial; stem to 30 cm long, 2-4 cm diam.; leaf scars, 0.8-1 cm high, 2-2.5 cm wide; roots .moderately numerous, descending, tan, smooth, short, moderately thick, slightly tapered, 3-5 mm diam.; cataphylls subcoriaceous, 7-13 cm long, acute at apex and with subapical apiculum, medium green, drying brown, persisting intact, eventually deciduous. LEAVES erect to spreading; petioles (12)30-73 cm long, 5-7 mm diam., quadrangular to subterete, flattened to weakly and broadly sulcate adaxially, sharply to bluntly 1-3 ribbed abaxially, the surface minutely pale-speckled; geniculum remote from the base of the blade 10-20 cm, 1.5-2 cm long; blades subcoriaceous, ovate to narrowly ovate or lanceolate, long-acuminate at apex, abruptly attenuate then acute to obtuse to truncate or subcordate at base, 20-66 cm long, 8.5-30 cm wide, broadest at or near the middle, the margins undulate; upper surface matte to weakly glossy, medium green, lower surface semiglossy to glossy, paler; midrib bluntly angular-raised above, below prominently higher than broad at base, becoming angular-raised toward the apex and paler than surface; primary lateral veins 11-20 per side, departing midrib at 40-60° angle, broadly arcuate, sunken to weakly raised in grooves above, prominently convexly raised below; interprimary veins almost as conspicuous as primary lateral veins; tertiary veins sunken above, raised below; collective vein arising from near the base, sunken above, raised below, equally as prominent as primary lateral veins, 2-8 mm from margin. INFLORESCENCES erect, longer than leaves; peduncle (30)70-130 cm long, equal to 1.2-1.5 x as long as petiole; spathe pale green, ovate-lanceolate, 8-13 cm long, 2.5-4.8 cm wide, inserted at 45° angle on peduncle, acuminate at apex, rounded at base; spadix pale green, moderately tapered, 5-12 cm long, ca. 9 mm diam. near base, ca. 6 mm diam. near apex; flowers sub-rhombic to 4-lobed, 1.7-2.5 mm long, 2-2.7 mm wide, the sides straight to sigmoid; 8-9 flowers visible in principal spiral, 12-1 8 in alternate spiral; tepals matte, minutely and densely papillate; lateral tepals 1.4-1.8 mm wide, the inner margins straight; pistils weakly emergent, green; stigma 0.4 mm long, weakly exserted and brushlike, droplets appearing 3-4 days before stamens emerge; stamens emerging in a scattered pattern, held against the pistil; filaments fleshy, greenish, translucent; anthers creamy white, 0.5-1 mm long, 0.6- 1.1 mm wide; thecae ellipsoid, not divaricate; pollen yellow fading to creamy white, abundant. INFRUCTESCENCE: not seen.