Anthurium crassivenium Engl.

Terrestrial herb or rarely hemiepiphytic; internodes (2)4–(6)10 cm long, 6–10 cm diam, drying yellow-brown, finely to coarsely ridged; cataphylls 12–18 cm long, deciduous or persistent at upper nodes as a network of thin, pale fibers; petioles terete, 29–43 cm long, ca 1.5 times longer than blades, drying sometimes yellowish brown; blades 27–44.5 cm long, 20–25 cm wide, ovate-cordate, broadest above point of petiole attachment, subcoriaceous, conspicuously bullate, acuminate at apex; midrib narrowly raised and concolorous above, convex and paler below, sparcely strigose on lower surface, drying moderately paler below; primary lateral veins 5–10 per side, arising at 45–50 degrees° (70 degrees), drying paler than surface; tertiary veins impressed above, prominently raised, thicker than broad and conspicuously strigose below; reticulate veins prominulous on both surfaces; collective veins arising from third basal veins, 4–6 mm from margins; posterior lobes directed toward the base or inward, sometimes overlapping; sinus obovate, 7–9 cm deep, 1.7–4 cm wide. Inflorescences erect-spreading; peduncles 14–19 cm long, drying 2–3 mm diam; spathe green, 6.5–13.5 cm long, 1.2 cm wide; spadix dark purple, narrowly tapered, (6.7)10–18 cm long, drying ca 4–10 mm diam, sessile to stipitate to ca 7 mm long; flowers 5–6 per spriral, 2–2.5 mm long; lateral tepals 1.2–1.4 mm wide, the outer margins-sided, acute, inner margins broadly rounded. Berries not seen.

Anthurium crassivenium ranges from Colombia (Cauca in Parque Nacional Munchique) to Ecuador (Azuay, Tungurahua, Napo, Morona-Santiago and Zamora-Chinchipe), ranging from 2400--3000 m. The species is apparently restricted to montane cloud forests. It is certainly to be expected further to the south and in northern Ecuador. The species is characterized by its generally terrestrial habit, the somewhat elongated nodes, the ovate-cordate, conspicuously bullate blades that are strigose on the veins below and by the purple spadix. No other species is easily confused with A. crassivenium in Ecuador but younger plants of A. corrugatum may be confused with it. Adult plants of A. corrugatum have much stouter stems, much bigger leaves and a greenish spadix. One of the specimens from Colombia (Betancur & Churchill 2536) reports the spadix to be green, rather than purplish but it appears to differ in no other way. Material of this species has been confused with A. bullosum Sodiro but that species has proven to be a synonym of A. corrugatum Sodiro.

Anthurium crassivenium là một loài thực vật có hoa trong họ Ráy (Araceae). Loài này được Engl. miêu tả khoa học đầu tiên năm 1898.