Anthurium sebastianense Croat & Cerón

Terrestrial herb, less than 1 m tall; internodes short, 2.5 cm diam., the cut stem yellow; cataphylls to 11 cm long, moderately coriaceous, persisting with bases thin, persisting intact; petioles moderately sulcate, 47-49 cm long, .8-1.4 times longer than blades, drying matte, greenish brown, 4 mm diam.j blades ovate-subcordate, 34.5-40.5 cm long, 24-31 cm wide, 1.1-1.8 times longer than wide, narrowly rounded at apex, weakly emarginate with a very weak tip, drying gray and matte above, paler and yellowish brown and weakly glossy below; midrib narrowly rounded and slightly paler above, drying almost concolorous and finely ribbed, narrowly rounded and paler below, drying finely ridged and slightly paler; basal veins 3-4 pair, the 1st pair free to the base, the 2nd and 3rd pair coalesced 2.5 cm free to the base, the 3rd and 4th coalesced 5.7 cm; the posterior rib broadly curved, the veins bluntly acute; sinus arcuate with decurrent petiole; primary lateral veins 5-6 pair, arising at 30-35° angle, etched and concolorous above, drying etched and concolorous above, drying acute and irregularly wrinkled and slightly paler below; inner collective vein remote from the margin, up to 7 cm from the margin; the secondary pair collective veins merging with the margin somewhat above the middle; the 3rd pair of collective veins merging with the margin in the lower 1/4 of the blade; upper surface minutely and irregularly wrinkled and densely dark-spotted on magnification; lower surface densely glandular-punctate, drying moderately smooth on magnification but densely pitted with minute yellowish brown depressions ca. 1/20th of a mm wide. INFLORESCENCE erect; peduncle 34.5 cm long, 2.5-3.5 mm diam.j spathe 12.5-13.5 cm long, 1.8-2.4 cm wide, green, tinged with red, narrowly acuminate at apex, acute at base with the margins meeting at ca. 30°angle, then briefly decurrent, drying dark purplish brown, matte; spadix greenish brown, 15-18 cm long, 5-10 mm diam., 18-27 times longer than wide, narrowly long-tapered to narrowly cylindroid; flowers 5-6 per spiral, 2.4-2.6 mm long; the lateral tepals 1.8-2.0 mm wide, the outer margins 2-sided, the inner margin broadly rounded; stamens held at level of tepals and in a tight circle around the pistil, .6 mm long, .8 mm wide; anthers broadly divergent.