Philodendron clewellii Croat

Epiphytic; stem scandent, smooth, thick, moderately glossy; internodes moderately glossy, 12--18 cm long, 3.5 cm diam., longer than broad, medium green to dark gray-green, epidermis fissured weakly longitudinally; cataphylls 18--25 cm long, soft, sharply 2-ribbed, green, caducous; LEAVES: petioles 24.5--53 cm long, (2)7--14 mm diam., subterete, spongy, dark green, obtusely flattened adaxially, surface green or white streaked-lineate; blades broadly ovate-cordate, subcoriaceous, moderately bicolorous, acuminate at apex (the acumen 1-2 cm long), cordate at base, 30--59 cm long, 20--45 cm wide (1.25--1.83 times longer than wide), (0.95--1.65 times longer than petiole), upper surface dark green, drying brown, semiglossy, lower surface slightly paler, drying brown, sometimes red-brown or green-brown, semiglossy, paler; anterior lobe 26.7--42.2 cm long, 23--45 cm wide (2.36--3.95(5.28) times longer than posterior lobes); posterior lobes broadly rounded, often overlapping, 7--18 cm long, 12--21 cm wide, obtuse to rounded; sinus narrowly closed; midrib weakly raised to almost flat, purple-spotted, paler than surface above, convex, darker than surface below; basal veins 3--5 per side, all free to base (or weakly fused); posterior rib absent or to 1.5 cm long, not at all naked; primary lateral veins 4--7 per side, departing midrib at a 45--60º angle, straight to the margins, weakly sunken, concolorous above, raised below, secondary veins weakly visible; minor veins visible, sparse, discontinuous below, arising from both the midrib and primary lateral veins. INFLORESCENCES to 6 per axil; peduncle 3.5--16 cm long, 3--6 mm diam., drying 2--4 mm diam., green, heavily red-striped; spathe 4.5--7 cm long, ((0.62)1.28--2.33 times longer than peduncle); spathe blade cream outside, purplish, with margins whitish inside; spathe tube purple outside, 2.5--3 cm long, 6--10 mm diam., purple inside; spadix sessile; clavate, 6 cm long; pistillate portion green, tapered toward the apex, 2.5 cm long, 6 mm diam. at apex, 7 mm diam. at middle, 8 mm wide at base; staminate portion 3.7 cm long; fertile staminate portion white, clavate, 7 mm diam. at base, 9 mm diam. at middle, 8 mm diam. ca. 1 cm from apex, broader than the pistillate or sterile portions; sterile staminate portion 7 mm diam.; pistils 1.6 mm long, 1.1 mm diam.; ovary 6(7)--locular, with sub-basal placentation; ovules 2 per locule, contained within translucent ovule sac, 0.2 mm long, equal in length to funicle, style similar to style type B; style apex concave; stigma discoid, unlobed, 0.6 mm diam., 0.1 mm high, covering interior faces of stylar funnel; the androecium truncate, 4--6-sided; thecae oblong to ellipical, 0.1--0.2 mm wide; sterile staminate flowers iregularily shaped, 2.1 mm long, 9 mm wide, the margins blunt. JUVENILE plants with internodes 5--6 cm long, 8 mm diam., dark green; petioles terete, sheathing to midway.