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Araceae
Philodendron dressleri G.S.Bunting
SUMMARY
Hemiepiphytic; stem scandent, 3--3.5 cm long, 4--4.6 cm diam., leaf scars conspicuous, 3--3.5 cm long, 4--4.6 cm wide; internodes short, stout, succulent, scurfy, 3--6.5 cm long, 4--7 cm diam., broader than long, pale olive-green to gray-green, becoming grayish white with age, epidermis peeling; roots few per node, brownish, smooth, long, to 7 mm diam.; cataphylls 16--22 cm long, sharply 2-ribbed, drying weakly 2-ribbed, densely short dark striate, sometimes deciduous in dry season; LEAVES: petioles 34.5--70 cm long, 1--1.8 cm diam., terete, somewhat spongy, surface dark green-striate, dark green ring around apex; blades ovate in outline, deeply incised-lobate, bipinnatifid, weakly bicolorous, matte to semiglossy, acute to weakly obtuse at apex (the acumen apiculate), cordate at base, 30--46.5 cm long, 27--40.5 cm wide (0.99--1.2 times longer than wide), (0.9--1.2 times longer than petiole), broadest near the middle; anterior lobe 20.5--30 cm long with up to 6 segments, 12--19 cm long and each 3--5-lobed; posterior lobes rounded in outline, turned up at angle to midrib with ca. 5 similarly lobed segments; sinus closed or nearly so; segments pinnatifid, 12.3--27 cm long, divided to within 2--15 cm from the midrib; the interlobal sinus divided 0.4--0.7 the length of the lobe; midrib flat, dark green striate, paler than surface above, round-raised, pale striate, paler than surface below; basal veins 4 per side, 3--4 coalesced 5--10 mm; posterior rib naked for 2.5 cm; primary lateral veins 5--6 per side, departing midrib at a 45--60E angle, more or less straight, eventually branching to the margins, flat to weakly raised above, round-raised and paler than surface below; reticulate veins visible, darker than surface below; minor veins arising from both the midrib and primary lateral veins; tertiary veins sunken and paler than surface above, raised and paler than surface below. INFLORESCENCES 1 per axil; peduncle 9--16 cm long, 7--9 mm diam. (dried), green; spathe 12--21 cm long (1.3 times longer than peduncle), weakly constricted above the middle, more or less obtuse at apex; spathe blade dark green outside, pinkish, with darker punctations inside; spathe tube green outside, to 4.5 cm long, purplish violet to wine-red or crimson inside; spadix 10--15 cm long; pistillate portion to 3.5 cm long, 2.2 cm diam.; staminate portion to 14 cm long; fertile staminate portion clavate, to 1.9 cm diam. at base, 2.4 cm diam. ca. 1 cm from apex; sterile staminate portion 2.4 cm diam.; pistils 3.7(7) mm long; ovary 4--5-locular, with axile placentation; ovule sac 2.5 mm long; ovules 3--4 per locule, 2-seriate, contained within translucent envelope, 0.4 mm long, longer than funicle; funicle 0.2--0.3 mm long, adnate to lower part of axillary wall, style similar to style type B; central style dome sometimes present; style apex flat; stigma subdiscoid to hemispheroid, 1.8 mm diam., 0.7 mm high, covering entire style apex; the androecium truncate, more or less prismatic, irregularly 5--6-sided, ca. 1.6 mm long; thecae more or less oblong, 0.4 mm wide, nearly contiguous, more or less parallel to one another. INFRUCTESCENCE with spathe 10-13 cm long, pistillate spadix 4--6.5 cm long, 3.5--4 cm diam.; seeds 3--4 per locule, 2 mm long, 0.8 mm diam.