Petunia integrifolia
Vierteljahrsschr. Naturf. Ges. Zürich 60: 361. 1915.
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.
Phenology: Flowering May–Oct.
Habitat: Waste places, along railroads and roadsides, poor soil or sand.
Elevation: 0–400 m.
Distribution
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).
Discussion
Naturalized populations of Petunia integrifolia appear to have been more common prior to the 1960s, based on herbarium specimens.
Selected References
None.