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Araceae/Ecuador | Family List | Araceae | Anthurium

Pachyneurium superbum subsp. superbum Madison, Selbyana. 5: 94. (1978).

Epiphytic. Stem 4-8 cm long, 3-4 cm diam. Roots numerous, descending, rose-colored, velutinous, 5-7 mm diam. Cataphylls subcoriaceous, (3)8-10 cm long, acute at apex, dark green, drying brown, persisting intact or semi-intact. Leaves erect; petioles 4-12 cm long, 5-8 mm diam., more or less D-shaped, with the medial rib and the margins raised adaxially, 3-5-ribbed to rounded abaxially, the surface dark green to sometimes dark purple-green; geniculum slightly thicker than petiole, ca. 0.8 cm long; blades coriaceous, stiff, elliptic to oblong-elliptic, obtuse-rounded at apex, obtuse at base, 34-65 cm long, 12-18 cm wide, broadest just above the middle, the margins revolute; upper surface matte to semiglossy, bullate, dark green, lower surface matte, sometimes tinged reddish or purple; midrib prominently acute above and below; primary lateral veins 7-10 per side, departing midrib at 40-50 degree angle, very long-arcuate to the margin or slightly arcuate to the collective vein, sunken to weakly raised above, raised below, drying slightly raised above and below; interprimary veins few, less prominent than primary lateral veins; tertiary veins sunken above, raised below, drying slightly raised; collective vein arising from about the middle of the blade or absent, sunken above, raised below, slightly raised above and below when dried, nearly as prominent as primary lateral veins, 10-20 mm from margin. Inflorescences erect, shorter than leaves; peduncle 7-18 cm long, 5-12 mm diam., ca. 2 times as long as petiole, dark green, terete. Spathe spreading to reflexed, subcoriaceous, green, lanceolate-elliptic, 8-9 cm long, 2-3 cm wide, broadest near the base, acute at apex (the acumen slightly inrolled), acute at base; stipe to 5 mm long. Spadix creamy white, sometimes faintly tinged with purple, cylindroid, sessile or shortly stipitate, erect, straight to slightly curved, 8-15 cm long, 8-12 mm diam. midway. Flowers more or less rhombic, 1-1.5 mm long, 1.5-2 mm wide; 16-17 flowers visible in principal spiral, 23-24 in alternate spiral; tepals minutely puberlent to densely papillate; lateral tepals 0.7-0.9 mm wide, inner margins more or less straight, outer margins 2-4-sided; pistils prominently exserted, papillate; stigma circular, 0.3 mm long, brush-like. Infructescence with the spathe persisting; berries lavender with the apical 1/4 white, obovoid, sharply apiculate at apex, 6-7 mm long, 2.5 mm diam.

Type: Ecuador. Napo: La Primavera, Río Napo, Madison 5516 (SEL 2727370, holotype; F, K, MO, QCA, U, US, isotypes).

Napo: Río Napo: La Primavera, Madison 5516 (F, K, MO, QCA, SEL, U, US); Laguna Taracoa, 250 m, Christenson 1529 (MO), cultivated; Rio Napo, 200 m, 29 Nov 1983, Besse et al. 1960 (MO); 1982, Wright 7 (MO); Río Napo, 200 m,, 1977, Dodson s.n. (SEL); 17 Mar 1987, Pinto et al. 6044 (COL).


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