Anthurium atropurpureum var. atropurpureum

Terrestrial or rarely epiphytic; stem to 30 cm long, 1.5-2 cm diam.; roots mostly descending, 3-30 cm long, 2-4 mm diam.; cataphylls subcoriaceous to coriaceous, 1-7 cm long, narrowly acute at apex, drying pale brown (B & K 5/2.5), persisting ± intact, sometimes as a reticulum of fibers with the apex remaining intact. LEAVES ± erect; petioles 2-25 cm long, 2-8 mm diam., bluntly D-shaped or terete to subterete, obtusely or narrowly sulcate, sometimes weakly flattened adaxially, rounded abaxially, surface sometimes pale-speckled; geniculum thicker and paler than petiole, concolorous when dried, becoming fissured transversely with age, occasionally to 2.5 cm remote from the base of the blade, 0.5-1.5 cm long; blades subcoriaceous to coriaceous, mostly elliptic, often narrowly so, acuminate at apex (the acumen flat), attenuate or acute at base, 11-75 cm long, (3)5-14 cm wide, broadest at or near the middle, the margins flat to undulate; upper surface semiglossy to glossy, medium green, lower surface matte to semiglossy, sometimes paler, drying pale green; midrib convexly raised to angular at base, becoming narrowly raised toward the apex above, broadly acute at base below, becoming conspicuously and acutely raised to narrowly raised toward apex, paler than surface when dried; primary lateral veins 5-11 per side, departing midrib at (30)50-60° angle, mostly arcuate-ascending, rarely straight to the collective vein, raised above, prominently convexly raised below; interprimary veins rarely present, etched above, flat below; tertiary veins visible, usually weakly etched above, prominulous and darker than surface below; collective vein arising from near the base or near the apex, sunken above, raised below, 5-10 mm from margin. INFLORESCENCES erect, shorter than or equalling leaves; peduncle (8)15-47.5 cm long, 2-5 mm diam., l.3-4 x as long as petiole, terete; spathe spreading to reflexed, withering at anthesis, subcoriaceous, streaked with raphides when dried, green heavily tinged with purple at margins to purple-red throughout, lanceolate to linear-lanceolate, 2- 15 cm long, 0.5-2.2 cm wide, broadest near base, inserted at 90° angle on peduncle, acute to narrowly acute at apex, acute at base; stipe 3-15 mm long in front, 2-8(12) mm long in back; spadix usually deep purple (B & K purple 2/7.5), sometimes maroon to brown, cylindroid to long-tapered, erect, 2-14 cm long, 3-8 mm diam. near base, 2-4 mm diam. near apex, broadest at the base; flowers rhombic or 4-lobed, 1.6-2.2 mm in both directions when fresh, 1.8-2.4 mm in both directions when dried, the sides ± straight or smoothly to jaggedly sigmoid, 4-8(10) flowers visible in either spiral; tepals matte, muricate, weakly to conspicuously and minutely papillate, the papillae maroon (B & K red-purple 2/2.5); tepal surface olive-green (B & K yellow 6/10); lateral tepals 0.6- 1.5 mm wide, the inner margins straight to concave, the outer margins straight to weakly 4-sided; pistils emergent, raised, the exposed portion !z square, 0.6-0.7 mm in both directions, dark purple to green tinged with purple; stigma ellipsoid to oblong, 0.5-0.6 mm long, 0.2-0.3 mm wide, papillate, densely brushlike; stamens emerging rapidly from the base, in a f scattered pattern, the laterals preceding the alternates by ca. 8 spirals, the 3rd stamen preceding the 4th by ca. 2 spirals, held against the pistil; anthers greenish yellow, 0.4-0.6 mm long, 0.5-0.8 mm wide; thecae ellipsoid, slightly divaricate; pollen yellow-orange, creamy when dried. INFRUCTESCENCE with spathe withered; spadix 4-13 cm long, the stipe 0-5 cm long; berries dark purple to deep red, globose to ellipsoid, 5-6 mm long, 4-6 mm diam.; pericarp dry, thickened with numerous raphide cells; seeds 2 or frequently 1 per berry, oblong-ellipsoid, 3.6- 4.4 mm long, 1.8-2.4 mm diam., 1.2-1.4 mm thick, with a gelatinous appendage.