Philodendron subincisum Schott

Hemiepiphytic; leaf scars conspicuous, 1-1.5 cm long, 1 - 2 cm wide; internodes 1.2 - 6 cm long, 2.7-3 cm diam., broader than long, tan to reddish brown, epidermis with loose flakes; roots few to numerous per node; cataphylls moderately spongy, 23 - 34 cm long, unribbed, drying sharply 1-ribbed in lower one-third, pale green, drying tan to reddish brown, persisting semi-intact, eventually fibrous. LEAVES: Petioles 55.5-68 cm long, 1.4-1.5 cm diam., terete, medium green, drying yellowish tan to reddish tan, surface dark green diffuse-lineate; blades narrowly ovate, coriaceous, semiglossy, moderately bi-colorous, long acuminate at apex, sagittate at base, (40)57.5-72 cm long, (24)32.5-37 cm wide (1.7-1.8 times longer than wide), (ca. 1 time longer than petiole), margins hyaline, markedly sinuate, upper surface drying brown, lower surface drying yellow-red to brown; anterior lobe (32.5)40-49 cm long, (10)17.6-18 cm wide (2.3-3.3 times longer than posterior lobes); posterior lobes (10)17 - 18 cm long, 16-16,5 cm wide, obtuse; sinus hippocrepiform or closed and obovate with lobes overlapping, acute when young; midrib broad, flat, paler than surface above, convex, concolorous below; basal veins 4 - 9 per side, first (second) pair free to base, most coalesced 1 - 4- cm, 2 - 3 coalesced to 5.5 cm; posterior rib not naked or obscurely naked for ca. 1 cm; primary lateral veins 5 - 7 per side, departing midrib at a 50 - 60¡ angle, sunken, paler than surface above, convex, concolorous below; minor veins flat, darker than surface below, arising from both the midrib and primary lateral veins. INFLORESCENCES 2 per axil, ± erect; peduncle 7.5-10 cm long, 1.3 cm diam., medium green; spathe 16.5-20 cm long, 3.5 cm diam. (closed), 5 cm diam. (opened), constricted above the tube, acuminate at apex, margins paler; spathe blade semiglossy, greenish outside, white inside; spathe tube more ellipsoid, maroon-purple outside, bright cherry-red inside; spadix not seen.