Anthurium leonianum Sodiro

Terrestrial on rocky slopes; stem to 3 cm diam.; roots spreading-descending, whitish, appearing pubescent when fresh, thick, rather short, prominently tapered; cataphylls subcoriaceous, lanceolate, longer than petioles, acuminate at apex, drying brown, persisting as fine linear fibers. LEAVES erect-spreading to spreading; petioles 5-22 cm long, 10-15 mm diam., D-shaped, flattened and with a medial rib to broadly and sharply sulcate adaxially with the margins prominently raised, 5-8-ribbed abaxially, the surface pale-speckled; geniculum thicker and paler than petiole, 1-1.5 cm long; sheath 6-8 cm long; blades coriaceous, obtuse to acute at apex, rounded to acute at base, (23)43- 101 cm long, 8-29 cm wide, broadest at or near the middle, the margins prominently undulate; upper surface matte to semiglossy, dark green, lower surface matte to weakly glossy, paler, both surfaces drying yellowish green; midrib flat at base, becoming acutely raised toward the apex and conspicuously paler than surface above, prominently higher than broad at base, becoming acutely raised toward the apex below; primary lateral veins 10-15 per side, departing midrib at 45-60° angle, ascending ± straight to near margin, then arcuate-ascending and merging with margin, prominently convexly raised above and below; tertiary veins prominulous when dried above and below; collective vein arising from near the apex, raised above and below when dried, usually less than 5 mm from margin. INFLORESCENCES ± erect, equalling or longer than leaves; peduncle 46-91 cm long, 10-17 mm diam., 4- 5 x as long as petiole, subterete to 1-ribbed; spathe reflexed, coriaceous, green, long-lanceolate, 29-35 cm long, 2-5 cm wide, broadest near base; spadix dark purple (pre-anthesis), becoming greenish brown, long-tapered, 23.5-42 cm long, 10-12 mm diam. near base, 5-7 mm diam. near apex; flowers 4-lobed, 2.2 mm long, 1.5 mm wide; 14-15 flowers visible in principal spiral, 7-9 in alternate spiral; tepals weakly and minutely papillate; pistils weakly emergent; anthers ca. 0.5 mm long. INFRUCTESCENCE 2.5-3 cm diam.; berries dark purple at apex, obovoid.