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Araceae/Ecuador | Family List | Araceae | Anthurium

Anthurium manabianum Croat, Ann. Missouri Bot. Gard. 78(3): 680. (1991).

Description based on dried material only. Terrestrial; stem, roots and cataphylls unknown. Leaves spreading; petioles 22 cm long, 6–8 mm diam., apparently flattened adaxially, with sharply raised margins; geniculum slightly darker and scarcely thicker than petiole, 1 cm long; sheath 3 cm long; blades chartaceous (probably young), broadly oblanceolate, shortly acuminate at apex, long-attenuate at base, 95.5 cm long, 27 cm wide, broadest in the upper third, the margins slightly sinuate; both surfaces nearly matte, gray-green; midrib weakly and convexly raised toward the base, more prominently raised toward the apex above, prominently convex below; primary lateral veins ca. 27 per side, departing midrib at 40–50 degree angle, straight to the collective vein, convexly raised above, less conspicuously so below; interprimary veins absent except near the apex, almost as conspicuous as primary lateral veins; tertiary veins obscure above, weakly visible below; reticulate veins not visible; collective vein arising from near the base, as conspicuous as larger tertiary veins, 2–8 mm from margin. Inflorescences spreading; peduncle 24 cm long, 2 mm diam., 1.1 times as long as petiole, green, terete; spathe erect-ascending, chartaceous, green with numerous, conspicuous raphide cells, oblong-elliptic, 9–10 cm long, 1.3–1.5 cm wide, broadest at or near the middle, acuminate-caudate at apex (the acumen 10 mm long), obtuse-rounded at base; stipe 2.5–3 cm long; spadix purplish brown, cylindroid, moderately curved, semi-erect, held at ca. 30–40 degree angle from peduncle, 6.5–10 cm long, 4 mm diam. throughout or 3 mm diam. near apex; flowers square, 1.2–2 mm long, 1.5–2 mm wide, the sides straight to smoothly or jaggedly sigmoid; 3–5 flowers visible in principal spiral, 5–8 in alternate spiral; tepals very weakly papillate; lateral tepals 0.9–1.1 mm wide, the inner margins rounded, weakly erose, the outer margins 3-sided; pistils not visible; stamens more or less erect; filaments exserted 0.2–0.4 mm; anthers brownish yellow, 0.5–0.6 mm long, 0.2–0.4 mm wide; thecae oblong-ellipsoid, not divaricate. Infructescence not seen.

Type: Ecuador. Manabi: Portoviejo﷓Pichincha, 12 km E of San Placido, 450 m, Harling & Andersson 24750 (GB 1304﷓9, 1304﷓10, holotype).

Manabi: Portoviejo﷓Pichincha, 12 km E of San Placido, 450 m, Harling & Andersson 24750 (GB).


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