Anthurium mapiriense Croat

Erect terrestrial herb; internodes 1.8-3.5 cm long, 5-6 mm on drying light brown, finely ridged; cataphylls 4.8 cm long, truncate and apiculate, with pale linear cellular inclusions, only the basal, pale fibers persisting at nodes; petioles 14.5-17 cm long, 1.5-2 mm diam., drying greenish brown to light brown, deeply sulcate adaxially with a few obtuse ridges circumferentially; geniculum 15-17 mm long, 1.5 mm diam., drying slightly darker, finely many-ribbed, more or less terete; blades oblong-ovate, 18-23.6 cm long, 7.4-10.7 cm wide, 2.37 times longer than broad, 1.2 times longer than petioles, gradually long-acuminate at apex (acumen sometimes down-turned), deep lobed at base, drying medium yellow-brown above, pale yellow-brown to greenish yellow below; upper surface minutely areolate-ridged-granular with pale-linear cellular inclusions; lower surface moderately smooth with pale-linear cellular inclusions; anterior lobe 14-17.6 cm long, broadly convex to straight, rarely weakly concave posterior lobes 4.6--6.6 cm long, 2.8-4.1 cm wide, directed toward base; basal veins 4-5 pairs, 1st pair free to base; 2nd pair fused 5-7 mm, 3rd-4th pairs fused 20-21 mm; posterior rib naked 9-18 mm; midrib much thicker than broad, bluntly acute, drying slightly darker than surface, minutely granular above; narrowly rounded, drying densely and minutely glandular-ridged, concolorous below; primary lateral veins 7-8 pairs, arising at ca. 55° angle, narrowly rounded and concolorous above, narrowly rounded and concolorous below, both densely granular on drying; interprimary veins present; tertiary veins moderately inconspicuous; collective veins arising from 1st pair of basal veins, 2-4 mm from margin. INFLORESCENCE erect or nearly so; peduncle 18.3-18.5 cm long, 1-2 mm wide; spathe green, drying brownish, 4.5-5.3 cm long, 4-6 mm wide, 9.8 times longer than broad; spadix green, 5-5.9 cm long, 2-3 mm diam., 21.6 times longer than broad, stipitate 2 mm, flowers 4-5 visible per spiral, 1.6-2.2 mm long, 1.9-2.1 mm wide, 4-lobed, tepals matte, shield-shaped, minutely granular with several pale subglobular cellular inclusions; lateral tepals 1 mm wide, inner broadly rounded, outer margins 3-4 sided.