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Araceae
Philodendron ligulatum var. heraclioanum Croat
SUMMARY
Internodes short, to 1 cm long, 1.1--2.5 cm diam., usually longer than broad, medium green, semiglossy, drying pale yellow-brown, conspicuously and irregularly ridged and cracked; roots moderately few, to 30 cm long, 4 mm diam., reddish brown, weakly glossy, finely scaly; cataphylls 15--20 cm long, bluntly 1--2-ribbed, sharply 2-ribbed near apex. LEAVES: Petioles (8.5)20--28 cm long, sharply D-shaped, with adaxial margins winged (to 6 mm high); blades oblong-elliptic to narrowly oblanceolate-elliptic, obtuse to narrowly rounded at base, (29)46--61 cm long, (8.5)12--15 cm wide ((2.9)4.3--5.4 times longer than wide), (2--2.6(6.3) times longer than petiole), upper drying blackish, lower surface matte, heavily tinged or mottled violet-purple or maroon, drying dark brownish black; midrib narrowly rounded and paler than surface below with maroon spots on older veins; basal veins lacking; primary lateral veins 5--12 per side, departing midrib at a 40--50º angle, to the margins, green with maroon spots on older plants. INFLORESCENCES 1 per axil; peduncle (5)13--15 cm long, 1 cm diam.; spathe pale green, 10--12 cm long, to 6.5 cm wide when flattened, tinged violet-purple on outer margin and at base outside and at base inside; spathe blade greenish inside; spathe tube pale green, glossy inside; spadix 9.5--12 cm long; pistillate portion 4.3 cm long in front, 3.6 cm long in back; ovules 2 per locule, contained within transparent matrix, style similar to style type C; style funnel shallow to moderately deep. INFRUCTESCENCE with berries oblong-elliptic, 3 mm long; seeds oblong, light yellow-brown, 1.4 mm long, 0.4 mm diam., narrowly ribbed longitudinally. JUVENILE blades with lower surface heavily tinged maroon.