Solanum seaforthianum |
Solanum setigeroides |
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Brazilian nightshade |
bristly nightshade |
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Habit | Herbs, annual, spreading, branching from near base, densely armed, 0.3–0.7 m, prickles straight, 4–8 mm, 30+ per cm of stem, sparsely pubescent, hairs ca. 0.2 mm, stipitate-glandular, abaxial leaf surfaces also with scattered, sessile, 4–6-rayed, stellate hairs, central ray equal to lateral rays. | |
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 2–7 cm; blade simple to compound, broadly ovate to deltate, 4–11 × 4–8 cm, margins twice-lobed to twice-divided with 2–3 main leaflets per side, leaflets with obtuse or rounded lobes, base truncate. |
Inflorescences | terminal, becoming lateral, extra-axillary, much-branched, to 100+-flowered, to 25+ cm. |
extra-axillary, unbranched, 5–9-flowered, 4–10 cm. |
Pedicels | inserted into small sleeve on inflorescence axis, 0.8–1.4 cm in flower and fruit. |
1–2 cm in flower, erect and 1–2 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. |
bilaterally symmetric; calyx accrescent and tightly covering fruit, densely prickly, 4.5–6.5 mm, sparsely glandular-pubescent, lobes lanceolate; corolla violet or blue, pentagonal, 1–1.5 cm diam., with abundant interpetalar tissue; stamens unequal, lowermost much longer and curved; anthers narrow and tapered, dehiscent by terminal pores, short anthers 2–4 mm, longer anther 3.5–5 mm; ovary glabrous. |
Berries | bright shiny red, globose, 0.8–1.5 cm diam., glabrous, without sclerotic granules. |
brown, globose, 1–1.2 cm diam., glabrous, dry, without sclerotic granules. |
Seeds | pale yellowish tan, flattened, 4–4.5 × 2.5-3 mm, minutely pitted. |
dark brown, flattened, 2.5–3 × 2–2.5 mm, minutely pitted and weakly ridged or faceted. |
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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2n | = 24. |
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Solanum seaforthianum |
Solanum setigeroides |
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Phenology | Flowering year-round. | Flowering Jun–Oct. |
Habitat | Disturbed sites. | Silty, sandy, or gravelly soils, playas, dunes, streambeds, arroyos, open hillsides. |
Elevation | 0–200 m. (0–700 ft.) | 600–2000 m. (2000–6600 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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AZ; NM; TX; Mexico (Chihuahua) |
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 setigeroides is a weed of disturbed and overgrazed places ranging from central Arizona and New Mexico to extreme western Texas. (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. heterodoxum var. setigeroides | |
Name authority | Andrews: Bot. Repos. 8: plate 504. (1808) | (Whalen) S. R. Stern: J. Bot. Res. Inst. Texas 8: 5. (2014) |
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