Solanum seaforthianum |
Solanum triquetrum |
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Brazilian nightshade |
Texas nightshade |
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Leaves | petiolate; petioles twining around supports, 1–4 cm; blade simple to compound, elliptic to broadly ovate, (2–)3.5–10(–13) × (1–)2–9(–11) cm, margins entire to divided with up to 4 pairs of leaflets, leaflet margins entire, base truncate or slightly cordate. |
petiolate; petiole 0.3–1.2 cm; blade simple, deltate to hastate or triangular, sometimes linear, (1–)1.8–5 × (0.3–)1–3.5 cm, margins entire to basally 2-lobed, lobe margins entire, base truncate to subcordate or hastate. |
Inflorescences | terminal, becoming lateral, extra-axillary, much-branched, to 100+-flowered, to 25+ cm. |
terminal or lateral, leaf-opposed or occasionally extra-axillary, unbranched or occasionally forked, 3–6-flowered, 1–3 cm. |
Pedicels | inserted into small sleeve on inflorescence axis, 0.8–1.4 cm in flower and fruit. |
inserted into small sleeve on inflorescence axis, 0.6–1.2 cm in flower, 1–1.5 cm in fruit. |
Flowers | radially symmetric; calyx not accrescent, unarmed, ca. 0.5 mm, nearly truncate, glabrous or sparsely pubescent on lobe tips; corolla purple, stellate, 1–2.5 cm diam., with sparse interpetalar tissue; stamens unequal due to unequal filaments; anthers ellipsoidal, 2–3 mm, dehiscent by terminal pores; ovary glabrous. |
radially symmetric; calyx not accrescent, unarmed, 2.5–3.5 mm, glabrous to sparsely pubescent, lobes triangular-acuminate; corolla white or tinged with purple, often with shiny green or greenish white eye, stellate, 1.5–2 cm diam., without interpetalar tissue; stamens equal; anthers oblong, slightly tapered, 3.5–4 mm, dehiscent by terminal pores that open into longitudinal slits; ovary glabrous. |
Berries | bright shiny red, globose, 0.8–1.5 cm diam., glabrous, without sclerotic granules. |
bright shiny red, globose, 1–1.5 cm diam., glabrous, without sclerotic granules. |
Seeds | pale yellowish tan, flattened, 4–4.5 × 2.5-3 mm, minutely pitted. |
reddish brown, plump-reniform to flattened, ca. 4 × 2.5 mm, minutely pitted. |
Climbing | or scrambling vines, woody, unarmed, to ca. 3 m, glabrous or sparsely pubescent, hairs white, unbranched, ca. 0.2 mm. |
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Vines | , semiwoody or scramblers with enlarged woody base, to 2 m, occasionally erect subshrubs to 0.5 m, unarmed, glabrous to densely pubescent, hairs usually ascending and pointing distally on stems, weak, unbranched, to 0.5 mm. |
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2n | = 24. |
= 24. |
Solanum seaforthianum |
Solanum triquetrum |
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Phenology | Flowering year-round. | Flowering year-round. |
Habitat | Disturbed sites. | Slopes, thickets, moist places. |
Elevation | 0–200 m. (0–700 ft.) | 0–1400 m. (0–4600 ft.) |
Distribution |
FL; Mexico; West Indies; Central America (Belize, Costa Rica, Guatemala, Honduras, Nicaragua, Panama); South America (Brazil, Colombia, Ecuador, Venezuela) [Introduced in North America; introduced also elsewhere in South America (Argentina, Paraguay, Peru), Asia, Africa, Pacific Islands, Australia]
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TX; Mexico (Coahuila, Durango, Hidalgo, Nuevo León, San Luis Potosí, Tamaulipas, Zacatecas)
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Discussion | Solanum seaforthianum is widely cultivated as an ornamental and sporadically escapes in Florida. A similar species with twining petioles, S. laxum Sprengel, is occasionally cultivated in California. It is distinguished from S. seaforthianum by having tufts of hairs in the vein axils of the abaxial leaf surfaces, white rather than violet corollas, and equal stamens. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Solanum triquetrum is widespread in central, southern, and western Texas. It could be confused with S. dulcamara, which also has shiny green dots at the corolla lobe bases, but the flowers of S. triquetrum are white and the leaves more sharply triangular. Leaf shape and size in S. triquetrum are extremely variable (S. Knapp 2013). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 14. | FNA vol. 14. |
Parent taxa | Solanaceae > Solanum | Solanaceae > Solanum |
Sibling taxa | ||
Synonyms | S. lindheimerianum | |
Name authority | Andrews: Bot. Repos. 8: plate 504. (1808) | Cavanilles: Icon. 3: 30, plate 259. (1795) |
Web links |