Araceae
Anthurium pirrense Croat
SUMMARY
Epiphyte; stems short; leaf scars hidden by cataphylls; roots moderately thin, greenish, descending; cataphylls subcoriaceous, 4.5-5 cm long, minutely apiculate at apex, drying medium brown, splitting at base, persisting more or less intact at apex. LEAVES erect-spreading; petioles 12-31 cm long, 6-7 mm diam., subterete, shallowly sulcate, the margins erect; geniculum 1.5-3 cm long; blades moderately thick, lanceolate to oblong-elliptic, abruptly acuminate at apex (the acumen downturned), obtuse to rounded at base, 20-29 cm long, 8-12 cm wide, broadest below middle; both surfaces semiglossy, the lower surface much paler, dark glandular-punctate; midrib convexly raised above, diminishing and sunken toward apex, convexly raised below; primary lateral veins 7-8(-12) per side, departing midrib at 55° angle, sunken above, raised below, more or less straight to collective vein; interprimary veins weakly sunken above, prominulous below; lesser veins scarcely visible below; collective vein arising from near the base or from one of the lowermost primary lateral veins, sunken above, raised below, 5-7 mm from margin. INFLORESCENCE spreading, equalling or longer than leaves; peduncle 19-48 cm long, 4-5 mm diam., sometimes faintly ribbed; spathe medium thick, pale green (B & K Green 8/2.5), lanceolate, 5-6.5 cm long, 1.3-1.5 cm wide, broadest at base, the margins tightly turned under, sometimes twisting longitudinally, inserted at 70° angle on peduncle; decurrent to 9 mm; spadix green (B & K Yellow-green 8/10), turning orange-brown before anthesis, lengthening markedly during anthesis, 9-15 cm long, ca. 5 mm diam. near base, ca. 2 mm diam. near apex; flowers rhombic, 2.5 mm in both directions, the sides more or less straight, 5-6 flowers visible in the principal spiral, 7-9 visible in the alternate spiral; tepals glossy, minutely papillate, lateral tepals ca. 1.9 mm wide, the inner margins straight; pistils raised, pale yellow-green; stigma ovate, ca. 3 mm long; stamens emerging slowly, more or less scattered or beginning at the base, the lateral stamens emerging to apex before alternates appear, only tip of anthers expose, anthers greenish white, 0.2-0.5 mm long, 0.5-0.7 mm wide, scarcely exposed, held at edge of pistil; thecae oblong, not divaricate; pollen white. INFRUCTESCENCE not seen.