Araceae
Anthurium venosum Griseb.
SUMMARY
Terrestrial or epilithic. Stem short, ca. 1.5-2 cm diam.; roots dense, grayish, moderately to densely velutinous, moderately elongate, ca. 3-5 mm diam.; cataphylls subcoriaceous, lanceolate, 3- 6 cm long, acute at apex, brown (B & K yellow 4/2.5), persisting semi-intact, eventually as a reticulum of fibers. LEAVES with petioles (5)15-40 cm long, ca. (3)6-10 mm diam., terete to weakly sulcate, medium green; geniculum 1 cm long; blades coriaceous to subcoriaceous, oblong-ovate, acute to shortly acuminate at apex (the acumen shortly apiculate), ± rounded to subcordate or weakly cordate at base, (17)24.5-46 cm long, (12.5)15.7- 21.5 cm wide, broadest at or near the middle, the margins broadly undulate; anterior lobe (15)22.5- 40 cm long; the posterior lobes (3.5)5-6 cm long, (4)5-6 cm wide, directed downward and rounded at apex; sinus mostly triangular, rarely arcuate with the blade decurrent on petiole to shallowly triangular, 1-3 cm deep; both surfaces glossy, moderately bicolorous, drying yellowish brown to yellowish green; midrib convexly raised above, paler than surface, more prominently raised below; basal veins 3-4 pairs, all free to base, raised above and below; primary lateral veins 5-9 per side, departing midrib at 40-65º angle, straight to broadly arcuate, prominently raised and paler than surface above and below; interprimary veins almost as conspicuous as primary lateral veins; tertiary veins prominulous; reticulate veins raised; collective vein arising from near the apex or absent. INFLORESCENCES spreading; peduncle 12-84 cm long, ca. 3-8 mm diam., 1.4-2.9 x as long as petiole; spathe reflexed, subcoriaceous, green, lanceolate to linear-lanceolate, 3- 10 cm long, 1- 1.5 cm wide, broadest near the base, acuminate at apex (the acumen sometimes cuspidate, 6-7 mm long), acute to decurrent at base; stipe 15-1 7 mm long in front, 5 mm long in back; spadix brownish green to purplish brown, tapered, ± erect to curved, 2- 15 cm long, 5-6 mm diam. near base, 2-3 mm diam. near apex; flowers rhombic, 2.5-2.9 mm long, 1.4-2 mm wide, the sides straight to smoothly sigmoid; 5-6 flowers visible in principal spiral, 8-9 in alternate spiral; tepals weakly roughened; lateral tepals 1.3- 1.7 mm wide, the inner margins broadly convex, the outer margins 2-sided; pistils pale green; stigma ± ellipsoid, 0.3-0.4 mm long; anthers 0.3- 0.4 mm long, 0.5-0.7 mm wide; thecae ± ovoid, not at all or only slightly divaricate. INFRUCTESCENCE with spathe persisting; spadix to 17 cm long, to 2 cm diam.; berries orange-red, ± ovoid to obovoid, 6-6.5 mm long, 4.5-6.2 mm diam.; seeds 1-2 per berry, brown with numerous pale raphide cells on the surface, 3.7-4 mm long, 1.7-2.8 mm diam., 1.2- 1.8 mm thick.