Anthurium angustifolium Theófilo & Sakur.
Herbaceous epiphyte, rarely rupicolous. Stem 4.5-5.0 x 1.5-1.8 cm, with short internodes 0.3-0.7 cm long, prophylls and cataphylls light green when young, brown to ferrugineous when mature, entire at the apex, brittle at the stem base, 10-11 x 1.9-2.4 cm. Leaves deflexed, petiole 9.5-13.5 x 0.4-0.7 cm, light-green, flat adaxially with obtuse margins when young, becoming flat with acute margins at proximal direction and slightly sulcate at distal direction when mature, always rounded abaxially, geniculum 0.8-1 cm long, thicker than the petiole, sheath light green, 1.2-1.7 cm long; blade light green, 34.5-48.7 x 6.5-8.1 cm, strongly contrasting colors on the two surfaces, upper surface darkgreen, lower surface pale green, chartaceous when fresh, subcoriaceous when dry, narrowly elliptic, apex acute, base cuneate to obtuse, midrib prominent and rounded on both sides, lighter or the same color as the blade, primary lateral veins obscure on both sides when fresh, becoming prominent when dried, little differentiated from the finer veins, 34-36 on each side, forming an angle of 35-40° with the midrib at the leaf base, 40-45° in the middle of the blade and towards the apex, infra-marginal collective vein starting from the leaf base or, more rarely 2.3-2.4 cm above it, 0.4-0.7 cm from margin. Inflorescence: peduncle vinaceous, rarely greenish at the base, terete, 31-32.5 x 0.4-0.5 cm; spathe membranaceous, vinaceous, vinaceous with greenish hues or vinaceous at base turning light-green towards the apex, deflexed before and during anthesis, reflexed post-anthesis and during frutification, linear-lanceolate, apex acute, forming an acute angle with the peduncle, 4.4-4.7 cm x 0.7-1, decurrent 0.2- 0.3 cm long; spadix sessile, rarely stipitate, vinaceous during anthesis, brownish in post-anthesis and during frutification, cylindrical, tapered, 7.8-9.9 x 0.7-0.8 cm, stipe vinaceous, 0.2-0.3 cm long; 4-5 flowers per principal spiral and 6-8 per alternate spiral; tepals vinaceous until anthesis, brownish at the apex, becoming light-green towards the base postanthesis and during frutification, hooded, dorsally acute, internally convex, lateral tepals 2.50-2.51 x 1.5-2.0 mm, anterior and posterior tepals 1.50-1.55 x 1.0-1.10 mm, filaments flattened, 0.55-0.80 x 1.50-1.75 mm, anthers dorsifixed, extrorse, 0.40-0.45 x 0.45-0.55 mm, gynoecium vinaceous, globose, sessile, bilocular, with one ovule per locule, placentation apical, funicle glabrous, 1.50-1.60 x 0.55-0.60 mm. Berries with light green apex when immature, reddish and turning translucent towards the base when ripe, seeds oblong, yellowish.