Terrestrial, hemiepiphytic, or epiphytic; stems to 6 m high in trees; internodes on juvenile to 30 cm long, 0.5-2.5 cm diam., semiglossy, tinged reddish, turning red or purplish with white streaks, with epidermis transversely fissured and sometimes peeling; on adult stems short, to 7 cm diam., brown, matte, drying semiglossy, pale yellow-brown with deep longitudinal ridges and sometimes also close transverse fissures; cataphylls on juvenile plants unribbed or very weakly 2-ribbed, 5-12 cm long, red to maroon, persisting as loose fibers at upper nodes, adult cataphylls to sharply 2-ribbed, 20-35 cm long, green, heavily tinged red, persisting semi-intact at upper nodes, turning mushy with gelatinous ooze, persisting as a reticulum of light brown fibers below; juvenile petioles 8-25 cm long, 1-1.5 mm diam., terete or very weakly flattened adaxially, short green-lineate, purple, with green trichomes or scaly, especially toward apex; juvenile blades thinly coriaceous, ovate-cordate, nearly caudate at apex, dark green and semiglossy on upper surface, slightly paler green to dark maroon on lower surface, 13-19 cm long, 8-12 cm wide; preadult internodes 6-20 cm long; petioles 32-89 cm long (averaging 64.5 cm), 5-8 mm diam. at middle, 1.2-1.6 times longer than blades, erect-spreading, densely warty and often conspicuously scaly in the distal 1/4, sometimes warty almost throughout, rarely almost smooth, obtusely D-shaped or obtusely flattened adaxially, with obtuse medial rib, medium to dark green, matte, fmely??? striate-lineate and asperous, firm, moderately brittle, drying reddish brown and matte, closely ribbed; blades broadly ovate-cordate, narrowly acuminate to caudate at apex, cordate at base, 46-69 cm long, 34-48 cm wide (averaging 53 x 47 cm), 1.3-1.5 times longer than broad, 0.6--0.9 times length of the petioles, broadest near point of petiole attachment, subcoriaceous; dark green and matte to semi-glossy above, moderately paler and weakly glossy to semiglossy below; surfaces drying from dark brown above, moderately paler and reddish brown below; anterior lobe 23.5-47 cm long, the margins broadly rounded; posterior lobes 17-26 cm long, 12.5-16.5 cm wide, directed toward base then inward; sinus spathulate to closed, 17-22 cm deep; midrib broadly sunken and paler above, convex to nearly round-raised and paler or tinged maroon (generally on younger plants) below; basal veins 8-11 pairs, 1st and 2nd free to base, the remainder evenly branched off of a more or less straight posterior rib, 5-6 acroscopic, 4-5 basiscopic, alternating with interprimay veins only slightly less prominent; posterior rib very prominent, naked 2.5-6.5 cm; primary lateral veins 7-10 per side, departing midrib at 45°-75° angles, ascending to margin, deeply quilted-sunken or narrowly sunken and sometimes slightly paler above, almost round-raised and paler or occasionally maroon tinged (younger plants) below; interprimary veins nearly as prominent as primary lateral veins, especially on lower surface; minor veins obscurely to moderately visible; minor veins ranging from granular to weakly puberulent on lower surface. INFLORESCENCES 1-6 per axil; peduncle 7-12 cm long, 4-9 mm diam. at middle, white on lower 1/2, pale green above, coarsely whitish streaked onto base of tube; spathe 12-17 cm long, 1.5-2 cm diam. on tube, erect, coriaceous, semiglossy, glabrous; spathe tube deep burgundy within, dark purple outside, 5-7 cm long, 2-3.5 cm diam.; spathe blade broadly lanceolate, broadly acuminate at apex, white inside, at least at tip, often tinged reddish violet on base of blade pale yellow-green outside, at least at tip, often tinged dark purple at base; spadix 10-14 cm long; pistillate portion cylindroid, 2.1-3.1 cm long, 11-14 mm diam.; staminate portion tapered, 6-8 cm long, 10-12 mm diam. at base, 6-8 mm diam. at apex, moderately tapered at apex; sterile staminate portion broadest at base, narrowest near apex, 2.5-3.5 cm long, 12-14 mm diam. at base, 8-11 mm diam. near apex; staminate flowers 1.1-1.3 mm long, 1.0-1.2 mm wide, irregularly shaped; sterile staminate flowers 2.7-3.2 mm long, 0.9-1.6 mm wide, irregularly shaped; pistils 3.0-3.2 mm long, 1.1-1.3 mm diam.; stigma 1.1-1.3 mm diam.; locules 5 per ovary; ovules 0.1-0.2 mm long, numerous in each locule.
Philodendron verrucapetiolum ranges from Colombia (Narino) to adjacent Ecuador (Carchi), at 1,780-2,010 m in Premontane wetforest. At La Planada, this species is apparently relatively frequent and widespread, having been collected near the summit of the hill above La Posada in the small patch of forest between the two pastured areas, along the trail to El Hondon beginning at Quebrade EI Tejon, in virgin cloud forest along Sendero La Vieja, and along the trail to the summit of the hill behind the Centro de Cientificos.