Araceae
Anthurium obtusilobum Schott
SUMMARY
Epiphyte or terrestrial; stems ca. 1.5 cm thick, to 30 cm long; roots numerous, moderately thin; cataphylls 10-15 cm long, drying tan, persisting intact. LEAVES with petioles ± erect, subterete, obscurely sulcate, 19-60 cm long, 6-9 mm diam.; geniculum ca. 2 cm long; blades ovate, moderately thick, 15-46 cm long, 9.5-28 cm wide, gradually to abruptly acuminate at apex, deeply lobed at base; anterior lobe 21-33 cm long, the margins convex; posterior lobes 9-16 cm long; sinus spathulate, rounded at apex; both surfaces matte; midrib convexly raised at base above, narrowing and acute at apex, raised below; primary lateral veins 3-6 per side, departing midrib at 45° angle, raised above and below; lesser veins sunken above, raised below; basal veins ca. 8 pairs, 3-4 coalesced 2.5-4 cm; posterior ribs naked, turned up along the outer margin; collective vein arising from one of the lowermost basal veins, extending to apex, 3-7 mm from margin. INFLORESCENCE spreading, shorter than leaves; peduncle (7)15-43 cm long, shorter than petioles; spathe oblong-elliptic, pale green to white, 7-11.5 cm long, 2.3-2.7 cm wide, long-acuminate at apex, obtuse at base; spadix cream to pale yellow-green, turning dark lavender to violet-purple, weakly tapered at apex, 4.5-7.6 cm long, 8-11 mm diam. at base, 5-7 mm diam. at apex; the flowers 4-lobed, ca. 3 mm long, ca. 4 mm wide, the sides jaggedly sigmoid; 5-10 flowers visible in the principal spiral, 8-9 flowers visible in the alternate spiral; tepals glossy, lateral tepals ca. 1.8 mm wide, the inner margin upturned; pistils raised, white to pale green; stigma brushlike, 0.4-1 mm long, glistening papillae exserted 4-5 days before first stamens emerge, turning brown; stamens emerging slowly from base, exserted on short white filaments, held over and obscuring pistil; anthers white, 0.3-0.5 mm long, 0.3-0.9 mm wide; thecae ellipsoid, not divaricate; pollen white. INFRUCTESCENCE with spadix to 15 cm long; berries red-violet, ovate, acute at apex; seeds not seen.