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Araceae
Philodendron hebetatum Croat
SUMMARY
Hemiepiphytic; stem appressed-climbing; internodes short, semiglossy, 1-4 cm long, 1.5-25 cm diam., longer than broad, green to gray-green, drying yellow-brown; roots moderately numerous per node, drying dark brown, ridged; cataphylls 12-35 cm long, unribbed, sometimes sharply 1-ribbed near apex (sharply 2-ribbed in South America), medium green, drying light to medium brown, persisting semi-intact at upper nodes, then deciduous with large patches of yellow-brown periderm remaining intact; petioles 27-75 cm long (averaging 49.6 cm), 0.8-1.8 cm diam., more or less terete, obtusely flattened adaxially, spongy (in South America), dark green to gray-green, surface semiglossy to matte, transversely fissured near apex, drying pale yellow-brown. LEAVES erect-spreading; blades ovate-triangular, abruptly acuminate at apex, cordate-sagittate at base, 24-63 cm long, 19-44 cm wide (averaging 40.7 x 31.9 cm), 1.1-2.3 times longer than wide, 0.7-1.2 times length ofthe petioles, equal to or longer than the petioles, subcoriaceous, margins concave, broadly undulate; upper surface semiglossy, dark green, drying conspicuously yellow-brown, semiglossy; lower surface opaque whitish, matte, paler; anterior lobe 195-495 cm long, 14.5-42 cm wide (1.9-3.6 times longer than posterior lobes); posterior lobes 7.1-20.2 cm long, 7.3-20.5 cm wide, obtuse to rounded; midrib broadly concave, paler than surface above, thicker than broad, weakly glossy, darker than surface below; basal veins 6 per side, with 1-2 free to base, second and third veins coalesced ca. 3 cm; posterior rib naked for 2.5-3.5 cm long; primary lateral veins 6-11 per side, departing midrib at a 35°-50° angles, weakly sunken above, convex and darker than surface below; minor veins moderately distinct, fine, intemittent below, arising from both the midrib and primary lateral veins. INFLORESCENCES 1-5 per axil; peduncle 4-11 mm diam., white-lineate to coarsely white-streaked toward apex and on spathe base; spathe 11-17.5 cm long, 2- 3.5 cm diam. (l.3-3.1 times longer than peduncle), white-speckled, semiglossy, constricted above the tube, 9-11 mm diam. at constriction; spathe blade green to whitish, sometimes rose-red outside, green to whitish or sometimes rose-red and white-speckled inside; spathe tube oblong-ellipsoid, 4-7 cm long, usually dark green or sometimes purple to violet-purple to red or pinkish outside, reddish to pale violet-purple inside; spadix white, cylindrical, 12.9-16.6 em long, broadest near the base, constricted near the middle; pistillate portion whitish, cylindrical to ovoid, 3.8-8.9 cm long, 7-16 mm diam.; staminate portion 9.3-13.4 cm long; fertile staminate portion cylindrical, 8-13 mm diam., broadest at the base, narrower than pistillate and sterile portions; sterile staminate portion as broad as or narrower than the pistillate portion, 1-1.3 cm diam.; pistils 2.1--4 (-5.8) mIl1 long, 1.2-2.6 mm diam.; ovary (4-)5-8-locular, with axile placentation; ovules 10-20 per locule, 0.2 mm long, funicle 0.1 mm long; stigma subdiscoid, 1-1.5 mm diam., 0.2-0.5 mm thick INFRUCTESCENCES with berries white, with purple stigmas; seeds 8-11 mm long, 2-3 mm diam.