Philodendron arbelaezii Croat & F. Cardona

Hemiepiphytic, appressed climber; internodes slender, 10-12.2 cm long, drying ca. 7 mm diam., yellow-brown, drying longitudinally closely fissured, often transversely cracked; cataphylls ca. 8.6 cm long, green, unribbed, deciduous.  LEAVES long-petiolate, widely spaced; petioles 11.9-16.9 cm long, erect-spreading, sulcate; blades 22.5-23 cm long, 10-10.4 cm wide, 2.2 times longer than wide, 1.6 times longer than petioles, subelliptic, broadest slightly above the middle, acuminate at apex, narrowly rounded at base, drying grayish brown and weakly glossy above, weakly glossy and yellow-brown below; midrib prominent, drying broadly rounded, and slightly darker above, finely acutely and ribbed and slightly paler below; primary lateral veins 6-7 pairs, arising at a 55-80° angle (2 pairs arising from base), weakly visible, concolorous above, drying wrinkled, concolorous below; interprimary veins few; minor veins fine, clearly visible; cross-veins close, moderately inconspicuous; laticifers apparently lacking. INFLORESCENCES 1 per axil; peduncles elongate, 7.2-11.1 cm long, 3-6 mm diam., dark brown upon drying; spathe green, weakly constricted above tube, ca. 10.3 cm long, ca. 1.4 cm diam. upon drying; spadix 9.8 cm long, staminate portion 6.7 cm long, 9 mm diam. at base, barely constricted, 7 mm diam. toward apex, bluntly pointed; sterile staminate portion 4 mm long, 9 mm diam., scarcely apparent compared to the fertile staminate flowers; pistillate portion 3.1 cm long in front, 8 mm diam.; ovary ovoid-ellipsoid, 5-locular; ovules basal, 1 per locule, ca. 0.15 mm long, about as long as the funicle, the funicle densely glandular in lower 1/2; berries not seen.