Solanum chenopodioides
Solanum pumilum
velvety nightshade, whitetip nightshade
dwarf horsenettle, dwarf nightshade
petiolate;
petiole 1–3 cm;
blade simple, narrowly ovate to elliptic, 1.5–5(–7) × 0.5–3.5 cm, margins entire or sinuate, base cuneate to decurrent.
petiolate;
petiole 0.2–1 cm;
blade simple, elliptic to obovate, 2.2–8.6 × 1.1–5.1 cm, margins entire, sinuate, or shallowly lobed with 2–6 lobes per side, lobe margins entire, base cuneate to attenuate.
extra-axillary or leaf-opposed, unbranched or rarely forked, umbel-like, 3–7(–10)-flowered, 1–3(–4) cm, fruiting peduncles sharply reflexed from base.
extra-axillary, unbranched, 1–4-flowered, 3–7 cm.
0.5–1 cm in flower and fruit, reflexed downward in fruit.
1–3.5 cm in flower and fruit.
radially symmetric;
calyx not accrescent, unarmed, 2–3.5 mm, sparsely pubescent, lobes deltate, appressed in fruit;
corolla white or purplish, with greenish, yellowish, or brown central star, stellate, 0.8–1.5 cm diam., with sparse interpetalar tissue;
stamens equal;
anthers ellipsoidal, 2–3 mm, dehiscent by terminal pores that open into longitudinal slits;
ovary glabrous.
radially symmetric;
calyx not accrescent, unarmed or sparsely prickly, 6–7 mm, densely stellate-pubescent, lobes triangular;
corolla white, stellate to stellate-pentagonal, 1.8–3 cm diam., with abundant interpetalar tissue at margins and base of lobes;
stamens equal;
anthers narrow and tapered, 6–7 mm, dehiscent by terminal pores;
ovary glabrous.
dull purplish black, globose, 0.5–1 cm diam., glabrous, without sclerotic granules.
unknown.
pale yellow, flattened, 1–1.5 × 1–1.5 mm, minutely pitted.
unknown.
= 24.
Solanum chenopodioides
Solanum pumilum
Solanum chenopodioides has been introduced sporadically and is occasionally adventive in North America. It is distinctive in having the fruiting peduncles strongly reflexed downward, but is otherwise difficult to distinguish from S. pseudogracile, with which it may be conspecific.
The illegitimate superfluous name Solanum gracile Dunal has often been used for S. chenopodioides (for example, J. K. Small 1913; A. E. Radford et al. 1968). W. G. D’Arcy (1974) included S. gracile (and its replacement name S. ottonis) in the synonymy of S. nigrescens but the taxa are distinct.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Solanum pumilum is endemic to Ketona dolomite outcroppings near the Little Cahaba River in Bibb County and on amphibolite outcroppings near the Coosa River in Chilton and Coosa counties in Alabama. It was collected originally from Georgia in the 1830s from Baldwin and Muskogee counties.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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