Philodendron purulhense Croat

Hemiepiphytic or rarely terrestrial, growing 3--6 m high in trees; stem appressed-climbing, or creeping; internodes short, semiglossy, to 6 cm diam., broader than long, dark green, epidermis intact; roots moderately dense, drying dark brown, ca. 3 mm diam.; cataphylls 20--30 cm long, 2-ribbed, sharply D-shaped, persisting semi-intact with brownish fibers at upper nodes. LEAVES: petioles 32--52 cm long, 1.5--2 cm diam., subterete, somewhat spongy, obtusely flattened adaxially, surface semiglossy, short-lineate, usually drying brown to blackened; blades ovate to ovate-cordate, subcoriaceous, slightly bicolorous, acute to acuminate at apex, cordate at base, 25--48 cm long, 18.5--40 cm wide (1.2--1.97 times longer than wide), (0.6--0.98 times the petiole length), about equal in length to petiole, upper surface somewhat silvery, semiglossy, lower surface drying dark brown to blackish; anterior lobe 20--38 cm long, 18.7--38 cm wide (2.1--3.1(3.6) times longer than posterior lobes); posterior lobes rounded, 7--17 cm long, 8--17 cm wide; sinus usually hippocrepiform, 12 cm deep; midrib flat, slightly paler than surface above, convex, paler than surface below; basal veins 4--7(8) per side, with all free to base, third and higher order veins coalesced 1.5--4 cm long; posterior rib naked for 1.5 cm; primary lateral veins 3--6 per side, departing midrib at a 35--40º angle, more or less straight to the margins, sunken above, convex and paler than surface below; minor veins moderately distinct below, arising from both the midrib and primary lateral veins. INFLORESCENCES 1 per axil; peduncle 2.5--7 cm long, 8--10 mm diam., whitish streaked; spathe 10--17 cm long (2.4--3.4(4) times longer than peduncle), constricted slightly above the tube, more or less ellipsoid; spathe green, short-lineate outside, reddish purple throughout inside; spathe tube 5 cm long, spadix sessile; 10--13 cm long; pistillate portion 4--4.5 cm long, 1.7--2.3 cm diam. at base, 2--2.7 cm diam. midway, 1.7--1.9 cm diam near apex; staminate portion 8--8.5 cm long; fertile staminate portion 1.8--2 cm diam. at sterile staminate portion, usually much broader than pistillate portion at anthesis, weakly tapered toward apex, scarcely or not at all constricted above the sterile portion, 1.4--1.8 cm diam. midway, 11--12 mm diam. 1 cm from apex, bluntly acute at apex; sterile staminate portion not very obvious, ca. 1.3 cm long, abruptly contracted at base, as broad as or narrower than the pistillate portion; pistils 6.2 mm long, 3.4 mm diam.; ovary 6--7-locular, 5 mm long, 3 mm diam., with axile placentation; locules 5 mm long, 1 mm diam.; ovules 13--20 per locule, somewhat transparent, 1 mm long, much longer than funicle; funicle 0.2 mm long, adnate to lower part of partition, style 1 mm long, 3 mm diam., similar to style type D; style apex more or less rounded; style boss broad, pronounced; stigma 1--1.1 mm diam.; the androecium truncate, oblong, prismatic, margins irregularly 4--5-sided, 1 mm long, 2--2.5 mm diam. at apex. INFRUCTESCENCE with pistillate spadix 4.5--5 cm long, 3--4 cm diam.; berries 1 cm long, 4 mm diam.; seeds 6--8 per locule, oblong-ellipsoid, 2.2--2.5 mm long, 0.7--0.9 mm diam., sticky.