Matthiola longipetala
Syst. Nat. 2: 174. 1821.
Annuals; sparsely to moderately pubescent, (glandular papillae present or not). Stems erect or ascending to decumbent, (1–) 1.5–5 (–6) dm, pubescent, (glandular or not). Basal leaves not forming vegetative rosettes. Cauline leaves: petiole to 2 cm or (distal) sessile; blade linear-lanceolate to lanceolate or oblanceolate, (2–) 3.5–8 (–11) cm × 2–10 (–20) mm (smaller distally), base attenuate to cuneate, margins usually pinnatisect to sinuate or dentate, rarely entire or subentire. Fruiting pedicels divaricate to divaricate-ascending, straight, (0.5–) 1–2 (–3) mm, nearly as thick as fruit. Flowers: sepals narrowly oblong, (7–) 8–11 (–12.5) × 1–2 mm; petals usually purple, pink, yellow, or brown, rarely white, oblong to linear-lanceolate, (15–) 18–23 (–27) × 2–4 (–5) mm, claw 7–13 mm, (margin crisped), apex subacute to obtuse; filaments 4–6 mm; anthers 2.5–3.5 mm. Fruits ascending to divaricate or, rarely, descending, straight, terete, (2.5–) 4–8.5 (–10) cm × 1–2 mm; valves pubescent, (often glandular); style obsolete to 3 mm; stigma horns 2, straight or curved upward, sometimes reflexed, 2–8 (–12) mm. Seeds suborbicular to oblong or ovate, 1–2 × 0.8–1.2 mm; wing 0.1–0.2 mm. 2n = 14.
Phenology: Flowering Mar–Jun.
Habitat: Roadsides, disturbed areas, waste grounds, fields
Elevation: 700-1300 m
Distribution
Introduced; Alta., Ont., Sask., Ariz., Calif., Tex., Europe, c, w Asia, n Africa, also in Australia
Discussion
Matthiola longipetala is sporadically naturalized in North America and Australia.
Selected References
None.
Lower Taxa
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