2. Petunia integrifolia (Hooker) Schinz & Thellung, Vierteljahrsschr. Naturf. Ges. Zürich. 60: 361. 1915.
[F I]
Violet-flowered petunia
Salpiglossis integrifolia Hooker, Bot. Mag. 58: plate 3113. 1831; Petunia violacea Lindley
Stems 1–7 dm. Leaf blades: proximalmost oblanceolate, distalmost lanceolate to ovate, 1.4–7.2 (including petiole) × 0.3–3 cm, margins entire. Pedicels 1–6 cm. Flowers: calyx 5–14 mm, lobes 3–11 mm; corolla rose-purple (drying deep violet), veins sometimes darker rose-purple or violet (not distinct from rest of corolla when dried), funnelform with slight abaxial bulge in the tube, tube 1–3 cm, limb 1–4 cm diam.; stamens inserted at base of corolla tube, longest 2 surpassing style; anthers and pollen blue to violet; filaments light purple to green; pistil 1–2.2 cm. Capsules 3–9 mm. 2n = 14.
Flowering May–Oct. Waste places, along railroads and roadsides, poor soil or sand; 0–400 m; introduced; Ala., Calif., Conn., D.C., Fla., Ill., Maine, Md., Mass., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., Tex., W.Va., Wis.; South America (Argentina, Brazil, Paraguay).
Naturalized populations of Petunia integrifolia appear to have been more common prior to the 1960s, based on herbarium specimens.
SELECTED REFERENCE Ando, T. et al. 2005b. A morphological study of the Petunia integrifolia complex (Solanaceae). Ann. Bot. (Oxford) 96: 887–900.
