Araceae
Anthurium lancetillense Croat
SUMMARY
Terrestrial; stems to 15 cm long, 2.5-3 cm diam.; leaf scars conspicuous, 2.3-3 cm wide; roots tan, 6-8 mm diam., descending; cataphylls subcoriaceous, 9-13 cm long, acute at apex, minutely subapiculate, drying tan, dilacerating at base, remaining intact at apex, persisting around base of leaves. LEAVES with petioles erect, 17-82 cm long, 5-10 mm diam., terete; geniculum 1.5-3 cm long; blades narrowly ovate, moderately thick, gradually long-acuminate at apex, deeply lobed at base, 38-54 cm long, 20-35 cm wide, broadest midway between base and point of petiole attachment, margins weakly undulate; anterior lobe 24-37 cm long, the margins rounded to concave; posterior lobes 12-19 cm long; the sinus spathulate to hippocrepiform, acute to obtuse at apex; both surfaces semiglossy; the midrib convexly raised above, more acutely raised below; basal veins 6-7 pairs, first and second free, the remaining coalesced 3.5-4 cm; posterior vein naked, weakly curved, rolled conspicuously upward; primary lateral veins 3-4 per side, departing midrib at 45°-50° angle, raised at midrib, sunken near collective vein above, raised below; lesser veins less conspicuous, flat above and below; collective vein arising from the first basal vein, sunken above, raised below, 2-10 mm from the margin. INFLORESCENCE erect-spreading, shorter than leaves; peduncle 3.5-36 cm long, 4-7 mm diam.; spathe subcoriaceous, green, sometimes heavily tinged with violet-purple on inner surface, lanceolate, 8.5-16 cm long, 2-3.2 cm wide, gradually long-acuminate at apex (the acumen inrolled ca. 3.5 cm) rounded at base, inserted at 45° angle on peduncle; spadix dark violet-purple (B & K Blue-purple 2/10), 11-20.5 cm long, 7-12 mm diam. at base, 3-5 mm diam. At apex; flowers rhombic to weakly 4-lobed, 3.3-5 mm long, 2.8-4.5 mm wide, the sides straight to weakly sigmoid; 5-7 flowers visible in the principal spiral, 4-12 visible in the alternate spiral; tepals matte, obscurely punctate, minutely papillate, lateral tepals 2.3-4 mm wide, the inner margin concave; pistils violet-purple around stigma, green below, weakly emergent; stigma ellipsoid, 1 mm long, opening ca. 2 weeks before first stamens emerge, large milky droplets apparent for several days, drying before first stamens emerge; stamens emerging in a relatively rapid sequence from the base, the lateral stamens emerging in basal one-quarter before alternates emerge, exserted on translucent filaments, 0.7 mm long, 0.5 mm wide; anthers pale orange, 0.6-0.7 mm long, ca. 0.8 mm wide, held in a contiguous cluster around pistil; thecae ovoid-ellipsoid, somewhat divaricate; pollen orange. INFRUCTESCENCE pendent; spathe persistent; spadix 10-23 cm long, developing berries in basal one-third to one-half; berries, orange, ovoid, 10-13 mm long, 8-11 mm diam., acute at apex; mesocarp juicy with numerous, minute raphide cells; seeds 1-2, pale green, ca. 6.8-8.0 mm long, 4.5-6.2 mm wide.