Araceae
Anthurium luteospathum Croat
Nomenclature
SUMMARY
Epiphyte; internodes short, 2.5 cm diam.; cataphylls persisting intact, to 4 cm long, 0.5 cm wide, light yellow-brown. LEAVES with petioles 63 cm long, 0.5 cm diam. midway, subterete and weakly sulcate, drying narrowly and obtusely sulcate and finely ribbed, drying medium brown, matte; geniculum 3.5 cm long, darker than petiole; blades ovate-sagittate, 53 cm long, 37 cm wide, widest 0 - 6 cm above petiolar plexus, acuminate (acumen 1 cm long), 1.4 times longer than wide, 0.8 times as long as petiole, thinly coriaceous, bicolorous grayish brown, weakly glossy above and semiglossy below; upper surface conspicuously densely granular, sparsely short-pale-lineate; lower surface minutely and densely red speckled, not dark-dotted on either surface; anterior lobe 41 cm long, margins strongly convex; posterior lobes 14 - 17 cm long, 13 cm wide; midrib thicker than broad above, narrowly convex below, concolorous above and dark brown below; primary lateral veins 6 - 7 pairs, arising at a 46 - 50° angle, weakly narrowly raised above, thicker than broad below; tertiary veins inconspicuous above, weakly raised below, concolorous above and below; collective veins arising from 2nd basal veins, 0 - 1.5 mm from margin; antimarginal veins present; basal veins 6 pairs, 1 pair free to base, 2nd pair coalesced to 0.5cm, 3rd pair coalesced to 2 - 2.5 cm, 4th and 5th to 5 cm, 6th to 6.5 cm, narrowly convex; posterior rib 6.5 cm long, naked to 2.5 cm, weakly curved; sinus parabolic, 12 cm deep. INFLORESCENCES with peduncle 17 cm long, 3 mm diam. midway, narrowly and acutely ribbed, somewhat dark brown, matte, 2.1 times longer than spathe; spathe 8 cm long, 2.5 cm wide, lanceolate, coriaceous, yellow, drying medium brown; spadix sessile, 6.5 cm long, 7 mm diam. midway, cylindroid-tapered, blunt at apex, purple, drying dark brown; flowers 9 - 10 per spiral, 1.8 - 2.0 mm long, 1.7 - 1.8 mm wide; tepal 1.0 - 1.2 mm wide, inner margin weakly rounded, outer margin mostly 2-sided sometimes 3-sided, surface with sub-rounded cellular inclusions, stamens 0.4mm long, 0.5 mm wide, thecae not divaricate.