Solanum mauritianum
Delic. Fl. Faun. Insubr. 3: 16, plate 8. 1788.
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. Inflorescences terminal, becoming leaf-opposed, much-branched, 50–100-flowered, 5–24 cm. Pedicels erect and 0.2–0.5 cm in flower and 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. Berries yellow, globose, 1–1.5 cm diam., tomentose, without sclerotic granules. Seeds yellowish brown, flattened, 1.5–2.5 × 1.5–2 mm, minutely pitted. 2n = 24.
Phenology: Flowering Mar–Jul.
Habitat: Disturbed sites.
Elevation: 0–500 m.
Distribution
Calif., Fla., South America (Brazil, Uruguay), introduced also in Asia (India), Africa, Atlantic Islands, Indian Ocean Islands, Pacific Islands, Australia.
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.
Selected References
None.