Philodendron edwinii Croat & M. Correa

Growing up rocky cliff; internodes elongate, 4-6 cm long, 2.1-2.2 cm diam., medium green, soon light brown; sap clear, but weakly chalky white upon drying; roots 5-6 at each node to ca. 30 cm long, 2-3 mm diam., yellow-brown; cataphylls obtusely 1-angled, medium dark green and dark-speckled, 25 cm long, deciduous; petioles weakly flattened and somewhat spongy, obtusely sulcate in lower half, obtusely sub-rounded adaxially, 25.9-35.6 cm long, drying 5-7 mm wide, blackish brown; blades broadly ovate, 36.6-51.8 cm long, 24.4-29.2 cm wide (averaging 43 x 27), 1.50-1.77 (averaging 1.61) times longer than broad, broadest at petiolar attachment, 1.2-1.6 (averaging 1.4) times long as petioles, abruptly acuminate at apex, prominently lobed at base, subcoriaceous, semiglossy, moderately bicolorous, drying blackish brown, semiglossy above, black-brown and semiglossy below; upper surface smooth, short, pale-lineate between veins; lower surface smooth, conspicuously pale-pustular; anterior lobe 31.2-41.7 cm long, with straight margins, the distal margin broadly rounded; posterior lobes 10.9-15.1 cm long, 7.9-10.4 cm wide, directed downward and inward; midrib flattened, and slightly paler above, narrowly rounded and slightly darker below, drying flattened and darker above, flattened to broadly convex and darker below; primary lateral veins obtusely sunken and weakly quilted adaxially, narrowly rounded and paler below, drying weakly and narrowly convex, concolorous above, obtusely sunken and darker below; minor veins moderately fine and visible arising mostly from midrib but also from the primary lateral veins closer to margins, drying distinct above and below; the cross-veins visible below; laticifers wavy and long above, more conspicuous, wavy and long, parallel to veins below; primary lateral veins 8-10 pairs with departing angle of 40-55°;  basal veins 7 pairs, 1st and 2nd pairs free to base, 3rd pair fused to 2.2 cm, 6th pair fused to 2.7 cm; posterior ribs gradually curved; sinus parabolic, 6.1-10.2 cm deep, 3.5-4.9 cm wide at middle. INFLORESCENCES 4-6 per axil; peduncle 7 cm long, 4 mm diam., green, semiglossy, drying blackish; spathe 4.5 cm long, tube 6 x 7 mm diam., pale green throughout inside, drying blackish brown; spadix 4.1 cm long, 5 mm diam. at middle, 4 mm diam. at apex;  male portion length 1.4 cm, female portion length 1.6 cm; pistillate portion pale green; pistils 4-locular, 1 mm long, 0.7-1.0 mm diam.; style broadly rounded on the margins; stigma weakly stalked, 0.4-0.5 mm diam., the stigmatic papillae erect to spreading; ovules basal, 1 per locule, contained within a translucent envelope that fills the entire locule, this 0.5-0.6 mm long, 0.3-0.4 mm diam., the ovule proper filling most of the translucent envelope, and about 1/3 of its total length is funicle.