Solanum viscosissimum Sendtn.

Woody vine with twining petioles, occasionally growing as an erect subshrub or herb. Stems strongly angled, sparsely to densely pubescent with transparent, simple uniseriate glandular-tipped trichomes of varying lengths, 0.5–2 mm long, most commonly 1–1.5 mm long, the glands unicellular; new growth sparsely to densely pubescent like the stems. Bark of older stems greenish brown, glabrescent. Sympodial units plurifoliate. Leaves simple to pinnatifid to deeply pinnate with up to 9 pairs of lobes, the lobes often not paired, (1-)5–8(-10) cm long, (0.5-)2.5–5.5(-9) cm wide, narrowly ovate or elliptic in outline, usually widest in the basal half in simple leaves, coriaceous or membranous, decreasing in size apically on the stems, the upper surfaces sparsely to densely pubescent with simple uniseriate trichomes to 2 mm long, these transparent and usually glandular, the lower surfaces glabrous (Rio de Janeiro) to pubescent with similar trichomes; primary veins 5–7 pairs, usually drying yellowish green; base cordate or truncate; margins entire and revolute or variously lobed, the lobes shallow to deep, the basal sinuses usually deeper, the edges of the margins usually ciliate with a fringe of simple uniseriate trichomes ca. 0.5 mm long; apex acute to acuminate; petioles from 0.2 cm long in distal simple leaves and these distal leaves often clasping the stem, to 5 cm long in larger leaves, sparsely to densely pubescent with simple uniseriate trichomes like those of the upper leaf surfaces, the longer petioles twining. Inflorescences terminal, later lateral, (1-)3–8(-14 +) cm long, simple to 4 times branched, with up to 25 flowers, sparsely to densely pubescent with simple uniseriate glandular trichomes like those of the stems; peduncle (0.5-)1.5–5(-11) cm long; pedicels 1.2–1.5 cm long, ca. 0.5 mm in diameter, filiform, nodding at anthesis, glabrous to pubescent with transparent simple uniseriate trichomes to 2 mm like those of the stems, these often glandular, articulated at the base from a tiny sleeve, leaving a minute peg on the inflorescence axis; pedicel scars irregularly spaced 3–9 mm apart. Buds globose when young and included in the calyx tube, later ellipsoid and the corolla strongly exserted. Flowers all perfect, 5-merous. Calyx tube 1.5–2 mm long, conical, the lobes 1.5–2 mm long, deltate to narrowly deltate, the sinuses splitting irregularly so the lobes irregular in shape and size, the tips elongate, sparsely to densely pubescent with simple uniseriate trichomes to 1.5 mm, these often glandular, the tips with a tuft of minute simple trichomes. Corolla 1.5–1.8 cm in diameter, white or violet, rotate-stellate, lobed 1/2 to 1/3 of the way to the base, the lobes 5–8 mm long, 3–5 mm wide, planar at anthesis, glabrous or with a few simple white trichomes scattered on the abaxial surface, densely papillate on the tips and margins. Filament tube minute, the free portion of the filaments 1–1.5 mm long, glabrous; anthers 3–4 mm long, 1–1.5 mm wide, ellipsoid, loosely connivent, poricidal at the tips, the pores lengthening to slits with age. Ovary glabrous; style 5–8 mm long, glabrous or puberulent in the basal half with tiny 1-celled simple trichomes ca. 0.2 mm long; stigma minutely capitate, the surface minutely papillose. Fruit a globose berry, 1–1.1 cm in diameter, purplish black when ripe, the pericarp thin and shiny, glabrous; fruiting pedicels 1–1.7 cm, ca. 1 mm in diameter, thicker towards the apex, somewhat woody, pendent. Seeds ca. 10 per berry, 3–3.5 mm long, 2–2.5 mm wide, flattened reniform, reddish brown, the surfaces minutely reticulate, the testal cells pentagonal, the lateral cell walls elongate and the seeds appearing pubescent in mature berries. Chromosome number: not known.

(Figure 107). Endemic to Brazil, from the Federal District south to the state of Rio Grande do Sul, from 500–1200 m.

Solanum viscosissimum là loài thực vật có hoa trong họ Cà. Loài này được Sendtn. miêu tả khoa học đầu tiên năm 1846.