Solanum mauritianum |
Solanum triquetrum |
|
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earleaf nightshade |
Texas nightshade |
|
Habit | Shrubs or small trees, erect, unarmed, 2–12 m, densely pubescent, hairs white, sessile to long-stalked, stellate to echinoid. | |
Leaves | petiolate; petiole 1–8 cm; blade simple, elliptic to ovate, 11–31 × 4–14 cm, margins entire, base acute, often with smaller axillary leaves. |
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 leaf-opposed, much-branched, 50–100-flowered, 5–24 cm. |
terminal or lateral, leaf-opposed or occasionally extra-axillary, unbranched or occasionally forked, 3–6-flowered, 1–3 cm. |
Pedicels | erect and 0.2–0.5 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 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. |
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 | yellow, globose, 1–1.5 cm diam., tomentose, without sclerotic granules. |
bright shiny red, globose, 1–1.5 cm diam., glabrous, without sclerotic granules. |
Seeds | yellowish brown, flattened, 1.5–2.5 × 1.5–2 mm, minutely pitted. |
reddish brown, plump-reniform to flattened, ca. 4 × 2.5 mm, minutely pitted. |
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. |
|
2n | = 24. |
= 24. |
Solanum mauritianum |
Solanum triquetrum |
|
Phenology | Flowering Mar–Jul. | Flowering year-round. |
Habitat | Disturbed sites. | Slopes, thickets, moist places. |
Elevation | 0–500 m. (0–1600 ft.) | 0–1400 m. (0–4600 ft.) |
Distribution |
CA; FL; South America (Brazil, Uruguay) [Introduced also in Asia (India), Africa, Atlantic Islands, Indian Ocean Islands, Pacific Islands, Australia] |
TX; Mexico (Coahuila, Durango, Hidalgo, Nuevo León, San Luis Potosí, Tamaulipas, Zacatecas)
|
Discussion | 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.) |
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. auriculatum | S. lindheimerianum |
Name authority | Scopoli: Delic. Fl. Faun. Insubr. 3: 16, plate 8. (1788) | Cavanilles: Icon. 3: 30, plate 259. (1795) |
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