Philodendron ayangannense Croat

Epiphyte; internodes short; cataphylls 1-ribbed 7-12 cm long; petioles 59.8-66.5 cm long, 6 mm diam., terete with narrow ridges, extremely warty at tip, minutely transversely ridged, drying dark brown. LEAVES with blades narrowly triangular-ovate-sagittate, 52.2-62 cm long, 30.2-40 cm wide, 1.55-1.73 times longer than broad, broadest below petiole attachment, 0.9-1.1 times longer than petioles, abruptly acuminate at apex, markedly bicolorous, drying subcoriaceous, areolate-ridged, yellowish brown and semi-glossy above, whitish brown, smooth and matte below, epunctate; anterior lobe 38.7-45.7 cm long, with straight to slightly concave margins in lower half of anterior lobe, the distil margin rounded; posterior lobes 21.8-23 cm long, 11.2-17 cm wide, directed downward and inward; midrib drying flattened and darker above, narrowly rounded, finely ribbed and darker below; primary lateral veins 5-6 pairs, arising at 75u angle, drying flattened, concolorous above, round-raised and darker below; minor veins arising mostly from midrib but also from the primary lateral veins closer to margins, drying obscure above and moderately visible and distinct below; laticifers presumably lacking; basal veins 8-9, 4 pairs acroscopic, 4-5 pairs basioscopic, 1st pair free to base, 2nd pair fused to 2.4 cm, remainder fused to 6.2 cm; posterior rib gradually curved, naked 3 cm; sinus broadly spathulate, 13.7-17.5 cm deep, 7.5-8.1 cm wide. INFLORESCENCES with peduncle 7.1-11 cm long; spathe green, maroon at base, 9.5-12.5 cm long, 1.9-2.3 cm wide, oblanceolate, drying coriaceous, reddish brown; spadix 9.5-10.6 cm long, drying reddish brown; pistillate portion 3-3.5 cm long in front, 2.5-2.7 cm long in back, 7 mm diam. at middle; staminate portion (5.2-)6.5-7 cm long, 10-13 mm diam. at middle, gradually tapered to apex, slightly narrower toward base; sterile staminate portion 2.1cm long, 1.3 cm long, 1.1 cm diam. midway, slightly narrower toward the apex and the base, drying slightly brownish; pistillate portion 3.3 cm long, ca. 1 cm diam.; pistils 2-2.1 mm long, 0.8 mm diam., narrowed into a style ca. 0.5 mm long, (4-)5-6-locular; stigma subglobular, ca. 1.2 mm diam. with prominent spreading papillae; ovary ca. 1.3mm long; ovules 1 or 2 borne in each transparent envelopes, these 1.2 mm long, the funicles about as long as the ovule, the lower half of funicle densely glandular; ovules basal, 1-2 per locule, 0.8-1.0 mm long, funicle about as long as ovule.