Philodendron pierrelianum Scherberich, Croat, M. M. Mora & G. Ferry

Hemiepiphytic vine to 3 m tall in cultivation; anchoring roots present at distal nodes, to ca.1.5 mm in diam.; internodes 2-6.5 cm long, 0.3-0.9 cm in diam., dark green, smooth, semiglossy, slightly flattened on one side; petioles 3.8-11.3 cm long, conspicuously sheathed throughout most of length, the sheath distinctly flattened 3.2-10.5 cm long and 1.2-3.2 cm wide, with a pale margin, prolonged distally, the free portion of petiole 1-10 mm, adaxially dark green, conspicuously purplish violet linear punctate on wings and purplish violet streaked on petiole on abaxial side when young, erect to erect-spreading, forming an angle of about 20° with the axis of the petiole; blades elliptic-lanceolate, 8.1-19.3 cm 3 3-8.3 cm, 2.3-2.7 times longer than wide, 1.7-2.1 times longer than petioles, dark green, pinkish to reddish when young, distinctly glossy above, semiglossy and much paler below, drying pale gray-green above, orange-brown below; slightly inequilateral, one side 23 mm wider than the other, convex, the margins distinctly revolute, apiculate at apex, the base rounded, very coriaceous; midrib conspicuously sunken above, raised below; primary lateral veins 3 to 4 pairs per side, arising at about 20u angle or less, barely distinct from interprimary veins, all slightly sunken above and undistinct below. INFLORESCENCES single or in pairs; peduncle about 4.3 cm long, 10 mm diam., dark green to brown, faintly striate toward apex; spathe 15.5 cm long, 3.5 cm wide at anthesis, clearly demarcated from the peduncle, barely constricted above tube, acuminate, uniformly dark green outside with faint dark linear-punctate markings, the inner surface greenish white, with conspicuous vertical sub-parallel reddish brown resin canals in the lower 2/3; spadix exserted, 13.8-14.5 cm long, shortly stipitate, the stipe 10-12 mm long in front, 5 mm in rear; pistillate portion 3-3.2 cm 3 14-15 mm, pale yellow-green, the staminate portion with a slightly swollen sterile section proximally, 1-1.5 cm long, the fertile section 8-9 cm long, gradually tapered, creamy white.