Solanum chenopodioides
Solanum mauritianum
tall nightshade, velvety nightshade, whitetip nightshade
earleaf 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 1–8 cm;
blade simple, elliptic to ovate, 11–31 × 4–14 cm, margins entire, base acute, often with smaller axillary leaves.
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.
terminal, becoming leaf-opposed, much-branched, 50–100-flowered, 5–24 cm.
0.5–1 cm in flower and fruit, reflexed downward in fruit.
erect and 0.2–0.5 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 slightly accrescent, unarmed, 4–7.5 mm, densely pubescent, lobes deltate;
corolla purple, stellate-pentagonal, 1–1.5 cm diam., with abundant interpetalar tissue;
stamens equal;
anthers oblong, 2–3.5 mm, dehiscent by terminal pores that open into longitudinal slits;
ovary tomentose.
dull purplish black, globose, 0.5–1 cm diam., glabrous, without sclerotic granules.
yellow, globose, 1–1.5 cm diam., tomentose, without sclerotic granules.
pale yellow, flattened, 1–1.5 × 1–1.5 mm, minutely pitted.
yellowish brown, flattened, 1.5–2.5 × 1.5–2 mm, minutely pitted.
= 24.
= 24.
Solanum chenopodioides
Solanum mauritianum
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.)
In Florida, Solanum mauritianum has become naturalized and common only at one site in Pasco County. It also occurs frequently in southern California from Santa Barbara south to San Diego with urban waifs in the Bay Area. It appears to be spreading into relatively undisturbed riparian areas in the San Gabriel Mountains and may become a widespread pest.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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