Philodendron mayoi E.G.Gonç.

Hemiepiphyte to scandent herb. Internodes 2-8 x 1-22 cm. Prophyll deciduous, 10-12 x 1.2-1.5 cm. Petioles flattened adaxially, 30-63 x 0.8-1.2 cm. Leaf blade pinnatiparrite, ovate in outline, 30-60 x 28-50 cm, chartaceous, adaxial surface dark green, paler adaxially, anterior division pinnatipartite, 18-36 x 28-50 cm, midrib triangular in transverse section, apex acute to acuminate, secondary nerves 4-6 per side, arising at an angle of 60-70°, lobes elongate-elliptic to oblanceolate, falcate, 6.5-23 x 1.5-4 cm, posterior divisions 8-15 x 18-25 cm, denuded portion of the basal rib 0.5-3 cm, acroscopic lobes 1-2, basiscopic 1-2. Inflorescences 1-3 per leaf axil, peduncle 8-20 x 0.8-1.3 cm; spathe white inside, green outside, 12-17 cm long; spadix 8-13 x 0.7-2 cm, fertile male portion tapering to the apex, 5-8 x 0.7- 1.5 cm, sterile male portion 0.5 x 1-2 cm, female portion adnate up to 1/2 of its length, 2- 5 x 1.3-2 cm. Male flowers 4-androus, stamens prismatic ca. 1 x 0.5 mm, staminodes clavate, ca. 2 x 0.5 mm, gynoecium 1.5-2 x 0.8-1 mm, 6-8-locular, locules 2-3-ovuled, funicles ca. 1/5 of the ovule length. Berry unknown.