Araceae
Anthurium impolitum Croat
SUMMARY
Terrestrial; internodes short, 1.0-2.5 cm diam.; cataphylls moderately thick, brown, 4.5-7.0 cm long, splitting at the base, intact at the apex, ultimately deciduous. LEAVES erect-spreading; petiole 14-55 cm x 2-5 mm, weakly sulcate to flattened adaxially near the geniculum, dark green tinged purplish; geniculum 1.0-1.8 cm x 3.5-6.0 mm, more conspicuously sulcate; blades deeply trilobed to 5-9(-11) cm from the base, subcoriaceous, (14-)20-42 x 24-42 cm, dark to medium green above, paler below, both surfaces matte, raphides present on the upper surface, base cuneate; central lobe oblanceolate [oblong-oblanceolate], 18-36 x 5-13 cm, apex acuminate; midrib raised above, angled, raised below, with 1 or 2 ribs; primary lateral veins 6-8 per side, straight, raised above, angled, raised below, departing midrib at 25-30°; tertiary veins conspicuous above and below; collective veins arising from one of the medial or lowermost pairs of primary lateral veins, 3-5 mm from the margin, flat to scarcely sunken above, raised below; lateral lobes falcate, (35-)40-55° [90°] from central lobe, (9-)13-30 x 4.0-9.5 cm, apex narrowly rounded, inner margin straight to weakly concave, outer margin convex; basal veins 4-5 pairs, the first free to the base, the lowermost 1-2 joined to 4 cm, the rest joined for 6-8 cm; posterior ribs straight, 40-60° from midrib, naked for up to 5 cm. INFLORESCENCE usually erect; peduncle (12-)23-36 cm x 3-5 mm, shorter than petiole; spathe green, lanceolate, (5.0-)9.5-12.0 x 1.0-1.5 cm, apex acuminate, base acute; stipe 4-9 mm long; spadix green (pale yellow), narrowly long-tapered, 5-14 cm long, (3-)5-6 mm diam. at base, 2-3 mm diam. at apex; 6-7 flowers per principal spiral, weakly 4-lobed, 2.0-2.5 x 1.5-2.5 mm, sides sigmoid; lateral tepals 0.6-0.7 mm wide, inner margin rounded, outer margin bluntly angled; stamens not exserted; anthers ca. 0.30-0.35 x 0.4 mm, thecae elliptic, slightly divaricate; pistils scarcely emergent, stigma ellipsoid, 0.4 mm across. INFRUCTESCENCE greenish, 7-14 cm x 6-9 mm; fruits purplish red at apex, white at base, round to ovoid, 1.6-3.3 mm diam.