Herb to subshrub, up to 2.5 m high, unbranched to sparsley branched. Stems and branches up to 1.1 cm in diam., strongly quadrangular, 4-angled to 4-winged, wings 0.1-1.3 mm wide; internodes 0.5-30.3(-47.3) cm long. Leaves sessile, cauline, evenly distributed along stem; blade membranaceous, elliptic, 2.9-23.2 x 1.2-8(-12) cm, margin not thickened, flat, apex acute to acuminate, base attenuate, obtuse to truncate. Inflorescence 3-100-flowered; bracts ovate with obtuse (acute) apex, 0.8-9.4 mm long; pedicel 4-9 mm long. Flowers erect to horizontal; calyx green, 4-8 x 3-6 mm, lobes ovate, 2-6 x 2-4 mm, margin membranaceous, apex obtuse; corolla white, cream, with dark green spot on apex of each corolla lobe, funnel-shaped to campanulate, 20-50 mm long, 8-21 mm wide at mouth, lobes ovate, 3-11 x 4-13 mm, apex obtuse or acuminate; stamens exserted or not, filaments 14-40 mm long, straight, or curved downward close to anther, anthers white to pale green, oblong, 2-3.8 mm long, straight to slightly curved; pollen exine with muri fragmented into elongated to knob-like processes that are thickened along equatorial zone (see Hequet, 2007; Maguire & Boom, 1989; Nilsson, 1970, 2002); pistil 24-34 mm long, ovary 4.4-5.6 x 2.1-2.6 mm, style 14-23 mm long, stigma lobe elliptic to obovate, 2.8-4.4 x 1.1-2.3 mm. Fruit nodding, brown, 8-23 x 3-10 mm; seeds brown, 0.1-0.4 mm in diam.
Brazilian Guianian Shield present, Guianas present present, Southern America: Brazil North (Roraima present); Venezuela (Venezuela present), Trinidad present
Venezuela, Trinidad, the Guianas, Brazilian Guianian Shield (Roraima); 101 collections studied, of which 53 from the Guianas (GU: 12; SU: 15; FG: 26).
English (Guyana): wild tobacco; English (Suriname): pepiatamit, pipjataner, sabama tabaka, todo tabaka, todo tabalso
The leaves have been used to relieve itching in Suriname (Archer 2652) and as a bitter in Guyana (McDowell & Stobey 3831).
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