CATE: Habitat
It is found only on the Atlantic slope in Honduras and Nicaragua, but on both slopes in Costa Rica and Panama. In Panama it occurs on the Pacific slope near the Continental Divide. Anthurium acutangulum is known from wetter parts of tropical moist, premontane wet, and tropical wet forest.
General Description
Epiphyte or rarely terrestrial; roots numerous; cataphylls subcoriaceous, 2.5-5(11) cm long, acuminate (the acumen apiculate), drying tan to light brown, persisting as linear fibers. LEAVES erect to spreading; petioles narrowly sulcate, rounded to sometimes 1-ribbed abaxially, 3-22 cm long, 4-7 mm diam.; geniculum 1-1.5 cm long; blades elliptic to narrowly obovate, subcoriaceous, short-acuminate at apex, acute to obtuse at base, 15-34 cm long, 5-14 cm wide, broadest at middle or slightly above, both surfaces semiglossy, the lower surface punctate; midrib convexly raised above and below; primary lateral veins 8-10 per side, departing midrib at 55°-60° angle, ± straight to collective vein, loop-connected from base; collective vein rising from base, sunken on upper surface, 3-8 mm from margin. INFLORESCENCE spreading to pendent, equal to or longer than leaves; peduncle 12-61 cm long, 4-4.5 mm diam., terete or strongly ribbed abaxially, sometimes 3-ribbed adaxially, rarely 4-6 ribbed, the ribs irregularly spaced, tinged with red-violet near base, much longer than petioles; spathe green, tinged with red-violet (B & K Yellow-green 8/10), oblanceolate, 7-11.5 cm long, 1.2-1.5 cm wide, broadest at base, inserted at 40° angle on peduncle, sometimes slightly twisted; stipe 6-7 mm long in front, 2-3 mm long in back; spadix yellow-green (B & K Yellow-green 6/7.5), 8.5-21 cm long, 4-6 mm diam. at base, 3-4 mm diam. at apex; flowers rhombic, 4.2-6 mm long, 2.5-3.5 mm wide, the sides ± straight; ca. 5 flowers visible in the principal spiral and ca. 4-6 flowers visible in the alternate spiral; tepals glossy, weakly punctate, papillate; lateral tepals 3-3.3 mm wide, the inner margins straight and flat; pistils emergent, green; stigma brushlike with droplets, dry and brown as stamens emerge; stamens emerging rapidly from base or middle, the first lateral stamens emerging at apex as third and fourth emerge at base, exserted on transparent filaments, 0.3-0.5 mm long, 0.7-1 mm wide, retracting and holding anthers at sides of pistil, not contiguous; anthers creamy white, 0.5 mm long, 0.7-0.8 mm wide; thecae ellipsoid, divaricate; pollen white, abundant. INFRUCTESCENCE pendent; berries pale orange, ± obovoid, ca. 5 mm long.
Distribution
Honduras (La Mosquitia) to Colombia. It has also been recorded on the Hawaiin Island of Honolulu.