Anthurium cataniapoense (Araceae)
Epiphytic; stem 1.5-2.5 cm diam.; roots dense, spreading-ascending, ca. 3-12 cm long, ca. 3-4 mm diam.; cataphylls hook-shaped, to 6 cm long, acute and shortly apiculate at apex, drying dark brown to reddish brown, persisting as linear fibers. LEAVES erect-spreading; petioles 6-13 cm long, 11 -14 mm diam., D-shaped, flattened when young, broadly sulcate and with a prominent medial rib adaxially, 1-3-ribbed or rounded abaxially; geniculum paler and thicker than petiole, 1-1.5 cm long; sheath to 5 cm long; blades subcoriaceous, broadly elliptic-oblanceolate, acute to obtuse at apex (the acumen inrolled), narrowly acute to rounded at base, 60-117 cm long, 20-50 cm wide, broadest above the middle, the margins broadly undulate; both surfaces semiglossy, green (B & K yellow-green 6/5); midrib acutely raised, becoming higher than broad toward the apex above, concolorous with the surface, acutely raised and paler than surface below; primary lateral veins 11- 16 per side, departing midrib at 40-60° angle, arcuate- ascending to the margin, weakly rounded-raised and concolorous with the surface above, obscurely raised and paler than surface below; tertiary veins flat and darker than surface below; collective vein arising from near the apex or absent, less prominent than primary lateral veins, 5-13 mm from margin. INFLORESCENCES pendent; peduncle 32-53 cm long, 3-4 mm diam., (3)5-6(8) x as long as petiole; spathe spreading, subcoriaceous, green, sometimes tinged brownish or purplish adaxially, lanceolate-oblong, 9-26 cm long, 1-2.5 cm wide, acuminate at apex, acute at base; spadix maroon to dark purplish violet (B & K red-purple 2/2.5), sessile, tapered-cylindroid, slightly curved, 11.5-24.5 cm long, 3-5 mm (6.5) diam. at anthesis midway, 3 mm diam. near apex; flowers rhombic, 1.5-2.3 mm long, 1-1.6 mm wide; the sides sigmoid; 8-1 2 flowers visible in principal spiral, 6-13 in alternate spiral; tepals matte, smooth; lateral tepals 0.5-1 mm wide, the outer margins 2-sided, the inner margins straight to rounded; stigma linear-elliptic, 0.4-0.5 mm long; anthers 0.6-0.8 mm long, 0.6-0.8 mm wide; thecae oblong- obovoid, slightly divaricate. INFRUCTESCENCE. Fruits purple (observed by Anibal Castillo, Puerto Ayacucho).
Endemic to the northern Amazon basin in Venezuela, in the basin of the Rio Negro and the Rio Orinoco in Amazonas and Bolivar. It has also been recordedover the border in Colombia. A specimen from northern Pará in Brazil, in the Tumucumaque Mountains, also appears to belong here.