Anthurium soukupii Croat

Terrestrial; stem elongate, to 50 cm long, 1.5- 2.5 cm diam.; roots moderately numerous, dense, white, smooth, thick, ± elongate; cataphylls lanceolate, probably subcoriaceous, to 11 cm long, acute at apex, drying yellowish tan, persisting as fine linear fibers. LEAVES spreading; petioles 6.5- 11 cm long, ca. 5-7 mm diam., triangular, flattened adaxially with the margins moderately to sharply raised, sides weakly convex, obtusely rounded to acutely angular abaxially; geniculum not at all or only slightly thicker than petiole when dried, 0.7-1 cm long; blades coriaceous, broadly to narrowly oblanceolate-elliptic, acute at apex, acute to obtuse at base, (22.5)28-63 cm long, (3.8)4.7- 10.7 cm wide, broadest above the middle, the margins straight to weakly undulate; upper surface semiglossy, medium green, paler below; both surfaces drying matte, occasionally semiglossy below, green to yellowish; midrib convex- to roundraised above, sharply acute below; primary lateral veins numerous, to more than 20 per side, departing midrib at 50-65º angle, ± straight, obscure to raised and darker than surface above, flat to weakly raised below; interprimary veins numerous, almost as conspicuous as primary lateral veins on both surfaces; tertiary veins not visible on either surface; collective vein arising from near the base, sometimes in the upper third of the blade, equally as prominent as primary lateral veins on both surfaces when dried, 3-12 mm from margin. INFLORESCENCES erect to spreading; peduncle 22-40 cm long, 2-4 mm diam., 2.6-4.2 x as long as petiole, apparently ribbed abaxially; spathe reflexed, subcoriaceous, green, lanceolate, 4.5-8 cm long, 0.7- 1.4 cm wide, broadest near the base, acuminate at apex, acute at base; stipe to 1 cm long in front, to 3 mm long in back; spadix dark purple, weakly tapered, stipitate to sessile, ca. 3.5-6 cm long, ca. 4-5 mm diam. near base; flowers ± square 3.1- 4.3 mm in both directions, the sides straight to smoothly sigmoid; 5-6 flowers visible in principal spiral, 6-7 in alternate spiral; lateral tepals 2.3- 3 mm wide, the inner margins straight, slightly turned up against the pistil, the outer margins 2-sided; pistils drying blackened, emergent well above the tepals, green; stigma linear, 0.5-0.6 mm long; anthers pinkish, ca. 0.8 mm long, 1 mm wide; thecae ovoid, slightly divaricate. INFRUCTESCENCE with spathe absent; spadix 3-13.5 cm long, 0.8-1 cm diam.; berries globose, rounded at apex, 3.2-4 mm long, 3.7-4.5 mm pericarp thickened, with numerous pale raphide cells; mesocarp gelatinous; seeds per reddish brown, ovoid, flattened, dried 3-3.5 mm long, 2.3-2.4 mm diam., 1.1-1.3 mm thick, enveloped by gelatinous, sticky, amber substance.