Philodendron immixtum

Hemiepiphytic; stem scandent, sap reddish, watery; internodes long, slender, more or less glaucous, (2)10--15 cm long, (0.7)1--1.5 cm diam., much longer than broad, dark olive-green matte to weakly glossy, becoming gray-green, drying light brown, epidermis sometimes cracking with loose flakes; roots ca. 5 per node, to 15 cm long, 2--3 mm diam., tannish gray, drying reddish brown, more or less smooth, long; cataphylls somewhat spongy, to 17 cm long, unribbed, weakly 2-ribbed or sharply (1--)2-ribbed (ribs 2 mm high), pale green, dark short-lineate, drying pale brown to yellowish brown, usually some deciduous, sometimes persisting somewhat intact, eventually fibrous, obtuse at apex, margins paler, yellowish; LEAVES: petioles 7.5--16(21) cm long, 2--10 mm diam., subterete, sharply D-shaped to slightly flattened adaxially, rounded abaxially, surface dark green-striate, matte to semiglossy, shortly dark lineate, with dark green ring around apex; blades narrowly ovate to ovate-elliptic, or rarely oblong-elliptic, subcoriaceous, semiglossy, strongly bicolorous, abruptly acuminate at apex (the acumen tightly inrolled to apiculate, 2--4 mm long), subcordate, rarely rounded at base, 16--36 cm long, 5--12 cm wide (1.9--3.7 times longer than wide), (1.3--3.1(3.8) times longer than petiole), about twice as long as petiole, broadest below middle, margins narrowly hyaline, upper surface drying green to grayish to brownish green; posterior lobes short, about as broad as long and held close to petiole; sinus shallow, 0--2.5(3) cm deep; midrib flat to weakly convex, concolorous or slightly paler than surface above, convex to bluntly acute, paler than surface below; basal veins lacking; primary lateral veins 4--8 per side, departing midrib at a 50--60º angle, more or less straight to weakly arcuate to the margins, sunken and paler than surface above, weakly raised and darker than surface below; interprimary veins weakly raised and darker than surface; minor veins distinct to weakly visible, darker than surface below, arising from both the midrib and primary lateral veins. INFLORESCENCES 1 per axil; peduncle 5--13 cm long, 3--7(11) mm diam., dark green; spathe 9--19 cm long, (1.1--2.1 times longer than peduncle), green, densely and obscurely short-lineate, narrowly acuminate at apex; spathe blade pale greenish white to white outside, pale greenish white, dark lineate inside; resin canals appearing as continuous lines, drying reddish brown, resin droplets forming on spathe surface within; spathe tube dark green in back, paler in front on open edges outside, red or violet-purple inside; spadix gradually tapered to apex, protruding out of the end of spathe, bluntly rounded to obtuse at apex, 10--11 cm long, broadest above the middle, constricted slightly above sterile staminate portion; pistillate portion pale green, cylindrical, 3.4--4.2 cm long, 3.7 cm long in front, 2.7 cm long in back, 9--11 mm diam. at apex, 10--11 mm diam. at middle, 9--11 mm wide at base; staminate portion 6.8--7.5 cm long; fertile staminate portion white, cylindrical to clavate, 9--12 mm diam. at base, 1.1--1.3 cm diam. at middle, 7--12 mm diam. ca. 1 cm from apex, broadest at the middle, broader than the pistillate portion, broader than the sterile portion; sterile staminate portion as broad as, narrower than or broader than the pistillate portion, more or less 12 mm diam.; pistils 1.9--2.3 mm long, 1.3--1.9 mm diam.; ovary (3)4--6(8)-locular, walls sometimes embedded with granular, crystal-like particles, locules 0.7--1.3 mm long, 0.4--0.7 mm diam., ovule sac 0.6--1.3 mm long, with sub-basal placentation; ovules 1(2) per locule, contained within transparent ovule sac, 0.4--0.7 mm long, longer than funicle; funicle 0.2--0.6 mm long, (can be pulled free to base), style 0.3 mm long, 0.9--1.4 mm diam., similar to style type B; stigma subdiscoid, unlobed, 0.7--0.9 mm diam., 0.2 mm high; the androecium truncate, margins 4--6-sided; thecae oblong to slightly ellipical, 0.4 mm wide, more or less parallel to one another; sterile staminate flowers 4--6-sided, 1--1.8 mm long, 1.1--1.7 mm wide. INFRUCTESCENCE with spadix yellowish orange, 8 cm long, 3 cm wide; berries concave at apex; seeds 1 per locule, 1.5--1.8 mm long, 0.6--0.7 mm diam., yellow-brown.