Anthurium effusispathum

Terrestrial or epiphytic; internodes short, ca. 1 cm long, 2–5.3 cm diam.; cataphylls persisting intact or semi-intact, red-brown or dark brown, 17–30 cm long, up to 8 cm wide at the base when flattened. LEAVES clustered at the base of the plant; petioles terete, weakly and obtusely sulcate, geniculate at apex, (27)56–128 cm long, ca. (0.6)1–2 cm diam. midway, medium to dark green, matte to semiglossy, sometimes minutely and densely speckled; geniculum ca. 3 cm long; blades narrowly ovate-sagittate, cuspidate at apex, with broad posterior lobes projecting inward and often overlapping, (28)50–84 cm long, (13)21–41 cm wide, averaging 70 x 32 cm, 1.4–2.7 times longer than wide, 0.5–1.0 times as long as petioles, subcoriaceous, dark green and matte-subvelvety or glossy above, paler green and glossy below, with punctations often clearly visible below; midrib convex and slightly paler above, acute and moderately paler below, prominently raised and 3-ribbed on older plants; primary lateral veins 11–17 pairs, rising at a 45–80° angle, weakly and narrowly raised, slightly paler in deep valleys above, acute and paler or almost concolorous below; tertiary veins mostly flattened and slightly darker below; collective veins arising from 3 rd –4 th pair of basal veins, 0–3 mm from margin; basal veins (5)6–7, first (1)2–3 pairs free to base, the remainder coalesced to varying degrees and regularly branching from the posterior rib; posterior rib thick, broadly curved, naked (1–)3–5 cm; sinus s pat hulate, with the posterior lobes markedly turned inward and often overlapping. INFLORESCENCES erect-spreading; peduncle terete, shorter than petioles, (32)53–99 cm long, 0.9–1.7 cm diam., medium yellow-green, semiglossy; s pat he erect-spreading, broadly ovate to lanceolate, 12–25 cm long, 4–17 cm diam., 2.2–6.2 times shorter than peduncles, coriaceous, white or greenish white and glandular inside, white or pale green and glossy outside, surrounding back and sides of spadix, sometimes hooding; spadix stipitate 5 mm, thick and tapering towards the apex, creamy white or pale yellow-green, becoming brownish green, pinkish or dark lavender after anthesis, matte, 11–31 cm long, 9–3.0 mm diam., 1.0 cm from tip.Flowers13–15 visible per spiral, 3.6–3.8 mm long, 3–3.2 mm wide; pistils weakly emergent; tepals glossy, drying matte, minutely papillate, lateral tepals 1.8–2.0 mm wide, the outer margin 2-sided, the inner margin broadly rounded; stamens 6 mm wide, 0.4 mm long, the thecae narrowly ovate, slightly divaricate; pollen creamy white. INFRUCTESCENCES erect, to 31 cm long, 3 cm diam., s pat he green, spadix turning purplish violet at maturity, weakly glossy; berries purplish red, 6 mm long.