Anthurium leuconeurum Lem.

CATE Araceae, 17 Dec 2011. araceae.e-monocot.org

General Description

Terrestrial; stems and internodes very short; cataphylls moderately coriaceous, acute at apex, persistent. LEAVES erect-spreading; petioles 30-70 cm long, 4-7 mm diam., terete or weakly sulcate adaxially, the blades held parallel to petiole; geniculum 1.5-3.5 cm long; blades narrowly ovate to ovate; abruptly acuminate at apex, deeply lobed at base, (12)20-38 cm long, (8)12-29 cm wide, broadest at point of petiole attachment; the anterior lobe (8)14-28 cm long; posterior lobes (2.5)6-13 cm long, directed toward base; the sinus obovate to hippocrepiform, rounded at apex; the upper surface velvety, dark green, the lower surface much paler; midrib and basal veins flat to weakly sunken above, much paler than surface; the area on either side of the veins paler than rest of blade; basal veins 5-6(7) pairs, at least the third and fourth coalesced 1-4.5 cm, arcuate-ascending, the second and sometimes the third joining the margin well above the middle of the blade; the posterior ribs straight to gradually curved, naked (at least on the larger blades); primary lateral veins 3-4 per side, departing the midrib at an acute angle, then gradually curved toward the margin, loop-connecting with collective vein; collective vein arising from the first basal vein or sometimes one of the lowermost primary lateral veins, 0.7-1.4 cm from margin. INFLORESCENCE erect, at least as long as leaves; peduncle 40-68 cm long, 4-6 mm diam., terete; spathe narrowly ovate to ovate-lanceolate, green, 4.5-10 cm long, 1-2.5(3.5) cm wide, broadest just above base, narrowly acuminate at apex, weakly cordate and clasping at base, inserted at ca. 20° angle on peduncle; spadix sessile or nearly so, green, (4)6-13 cm long, 6-8 mm diam. at base, 4-5 mm diam. at apex; the flowers rhombic, 3.8-4 mm long, 3-3.5 mm wide, the sides straight parallel to spirals, smoothly sigmoid perpendicular to spirals; 6-7 flowers visible in the principal spiral, 4-5 flowers visible in the alternate spiral; tepals sparsely punctate, lateral tepals 2.1 mm wide, the margin broadly rounded, thin and turned up against pistil; pistils elevated but not emergent until after anthesis of stamens; the stigma 0.5 mm long, elliptic, slitlike; stamens emerging in a prompt sequence from the base, the stamens in the basal one-third complete before the alternates emerge in the apical one-third; anthers held above tepals and over pistil but not obscuring stigma, 0.9 mm long, 0.8 mm wide, evenly spaced; thecae oblong-elliptic, scarcely divaricate. INFRUCTESCENSE pendent; berries broadly obovoid, rounded at apex, bright orange, 9-10 mm long, 8-10 mm diam.; pericarp moderately thick, with dense raphide cells; seeds 2, narrowly obovoid to obovoid, brown(?), slightly flattened, 6-7 mm long, 5-6.5 mm wide, 3.6-4 mm thick.

Distribution

Collected in southern Mexico in about 1860-1890 and apparently has not been recollected in the wild. Collections have been recorded by T. Croat in Australia.