Anthurium nigrescens

Epiphytic or hemiepiphytic vine; internodes elongate, 3-7 cm long, 1-2 cm diam., gray-green, smooth, weakly glossy to semiglossy; cataphylls to 2 cm long, chartaceous to subcoriaceous, to 13 cm long, persisting intact and drying black or deciduous, often with a few fibers remaining on upper nodes; petioles 27-50 cm long (averaging 39.5 cm), 3-6 mm diam. at middle, terete or obtusely flattened adaxially, medium green, unmarked, drying black; blades ovate-cordate to elongate triangular-ovate, acuminate at apex, cordate at base, 30-49 cm long, 18-30.3 cm wide (averaging 38.3 x 23.6 cm), 1.5-1.7 times longer than broad, .6-1.2 times longer than the petioles, broadest at or slightly below point of petiole attachment, subcoriaceous to moderately coriaceous; both surfaces semiglossy to glossy, drying black; upper surface medium to dark green; lower surface slightly paler; anterior lobe 25-35 cm long, 20-26 cm wide, broadest at base; posterior lobes 9-13 cm long, 9-13 cm wide, broadest at base, directed somewhat inward, rounded at apex; sinus spathulate, 7-12 cm deep; midrib narrowly rounded and slightly paler above, round-raised and paler below; basal veins 4-5 pair, the 3rd -4th coalesced (0.5)1-6 cm; posterior rib curved, partly naked to not at all naked; primary lateral veins 7-10, departing midrib at 45°-60° angles, ascending to collective vein, narrowly raised, slightly paler, often in weak valleys above, narrowly raised and slightly paler below; interprimary veins weakly raised below; tertiary veins moderately obscure; collective vein arising from one of first basal veins, 4-11 mm from margin; INFLORESCENCES erect-spreading; spathe green, reflexed, brittle; spadix yellow-green; pistils weakly exserted.