Philodendron anisotomum Schott

Usually a hemiepiphytic vine or sometimes on rocks; stem appressed-climbing, green as juvenile, graying with maturity, minutely and densely striate, sap watery, unscented, leaf scars conspicuous, 8--10 mm long, 7--9 mm wide; internodes smooth, semiglossy, to 2.5 cm long, 4--10 mm diam., usually longer than broad, medium green to olive-green, epidermis thin, tan, peeling; roots olive green, smooth, few per node; cataphylls thin, semispongy, to 10 cm long, unribbed, bluntly or sharply 1-ribbed, green, drying pale yellow-green, deciduous. LEAVES erect to spreading; petioles 21--57 cm long, (2)3--9 mm diam., terete, moderately spongy, whitish toward apex, slightly flattened toward apex adaxially, surface dark green striate at base; blades triangular in outline, deeply 3-lobed, subcoriaceous, moderately bicolorous, long-acuminate at apex (the acumen apiculate, to 3 mm long), hastate at base, 20--35 cm long, 20--42 cm wide (0.8--1 times longer than wide), (0.6--1 times the petiole length), upper surface dark green, semiglossy to glossy, drying dark brown to dark gray-green, lower surface semiglossy, paler, drying yellow-brown to yellow-green; anterior lobe oblong-lanceolate to oblanceolate, almost elliptic, 16--30 cm long, 7--15 cm wide (1--1.3(1.5)) times longer than lateral lobes); lateral lobes broadly confluent 1--3(8) cm with medial lobe, 10--25 cm long, 3--8.7 cm wide, directed outward (90º angle from midrib), acute to bluntly acute; sinus arcuate; midrib more or less flat to sunken, paler than surface above, broadly convex below; basal veins 4--7 per side, sometimes with last vein free to base, most veins coalesced 1.5--13 cm, 2 veins coalesced to 17 cm, drying reddish brown to yellowish brown; posterior rib naked; primary lateral veins 4--5 per side, departing midrib at a 50--60º angle, narrowly sunken above, convex below; interprimary veins weakly sunken and concolorous above, weakly raised and darker than surface below; tertiary veins visible, darker than surface below; minor veins fine, close, weakly visible to distinct below, arising from both the midrib and primary lateral veins but mostly from the midrib. INFLORESCENCES erect-spreading, 1 per axil; peduncle 5.5--19.5 cm long, 3--8 mm diam.; spathe 7.4--16.6 cm long, (0.8--1.4(1.7) times longer than peduncle); spathe blade green to greenish white to creamy yellow, tinged with violet-purple outside, tinged with violet purple, at least sometimes with yellowish resin canals visible inside; spathe tube green outside, 4--6 cm long, 2--3.5 cm diam., dark violet-purple inside; spadix sessile; white, drying golden-yellow throughout, tapered, more or less rounded at apex, 7.5--10.8 cm long, broadest near the base; pistillate portion pale green (post-anthesis), ellipsoid, 3.6 cm long, 1.3 cm diam. at apex, 1.2 cm diam. at middle, 6 mm wide at base; staminate portion to 8.4 cm long; fertile staminate portion white, ellipsoid, tapered at apex, 8 mm diam. at base, 5 mm diam. at middle, 5 mm diam. ca. 1 cm from apex, broadest at base, much narrower than the pistillate portion; sterile staminate portion tannish, 8 mm diam.; pistils (1.5)2.9--4.4 mm long, 1.7--2.3 mm diam., ovary (6)7--8-locular, (1)2.2--3.2 mm long, ovule sac 0.7 mm long, with sub-basal placentation; ovules 3 per locule, contained within translucent, gelatinous ovule sac, ca. 0.4 mm long, longer than funicle; funicle 0.2--0.3 mm long, (can be pulled free to base), style similar to style type B; style apex flat; stigma discoid, 5--6 mm diam., 0.1 mm high, covering center of style apex; the androecium more or less prismatic, margins irregularly 4--6-sided, 0.7-1.1 mm long; thecae oblong, 0.3 mm wide, more or less divaricate; sterile staminate flowers irregularly 5--6-sided, 1 mm wide. INFRUCTESCENCE 9.5-16 cm long, peduncle to 14 cm long; spadix to 5.3 cm long, to 3 cm wide; berries orange, rhomboid; seeds 1--2(3) per locule, (16)21--22(29) per berry, light brown, 1.5--2 mm long, 0.5 mm diam., with weak constriction (nipple) opposite funicular end of seed.