Stenospermation longifolium Engl.

Terrestrial; plants to ca. 1 m tall; internodes 2.5-3.5 cm long, 1.5-1.7 cm diam., dark green and semiglossy, becoming brown, scurfy, and densely transverse fissured in age; petioles 15-30 cm long (averaging 22 cm), dark green, semiglossy, the free portion thicker than broad, not sulcate, sheath ending 2-10 cm from base of geniculum (extending to the geniculum when subtending an inflorescence); geniculum sulcate; blades oblong-elliptic, acuminate at apex, rounded to obtuse or acute at base, 15-35.5 cm long, 5-13.5 cm wide (averaging 19 x 8 cm), 2.6-3.1 times longer than broad, 0.7-1.3 times length of the petioles, broadest at or near middle, slightly inequilateral, 3-16 mm wider on one side, subcoriaceous; upper surface dark green, finely striate, and matte drying brown (gray in Ecuador) lower surface slightly to moderately paler and semiglossy, drying paler reddish brown (greenish brown in Ecuador); midrib narrowly sunken and concolorous above, thicker than broad and slightly paler below; primary lateral veins raised above, but scarcely more so than the close minor veins, scarcely distinguishable from the minor veins below; minor veins prominently raised and obvious to the touch on both fresh and dried specimens on the upper surface. INFLORESCENCES cernuous; peduncle to 36 cm long; spathe white (pale green elsewhere), 11-16 cm long, narrowly acute (acumen to 2 cm long) fallen on mature inflorescences; spadix white, up to 4 cm shorter than spathe, 10.5-12 cm long, 8 mm diam. at base, 12 mm diam. at middle, 9 mm diam. at apex; broadest at middle, stipitate. Flowers 4-5 per primary spiral, 2.5-3.3 mm long, 2.4-3.1 mm wide.