Cardamine impatiens |
|
---|---|
narrow-leaf bitter-cress |
|
Habit | Biennials or, rarely, annuals; usually glabrous, rarely sparsely pubescent basally. |
Rhizomes | absent. |
Stems | erect, (angled, sometimes flexuous), unbranched basally, usually branched distally, (1.2–)2–6.5(–9) dm. |
Basal leaves | (often withered by flowering), rosulate, similar to cauline, with fewer distal leaflets. |
Cauline leaves | 9–24, (9–)13–25-foliolate, petiolate, leaflets petiolulate; petiole 2–6 cm, base auriculate (auricles to 10 × 2.2 mm); lateral leaflets similar to terminal, blade often smaller; terminal leaflet (petiolule to 0.5 cm), blade orbicular, obovate, ovate, or lanceolate, 1–4(–5) cm × 5–17 mm, margins entire or 3–5(–9)-toothed or -lobed. |
Racemes | ebracteate. |
Flowers | sepals oblong, 1.2–2(–2.5) × 0.7–1(–1.2) mm, lateral pair not saccate basally; petals (rarely absent), white, oblanceolate, 1.5–4(–5) × 0.6–1.2 mm; filaments 2–3(–4) mm; anthers ovate, 0.3–0.5 mm. |
Fruiting pedicels | divaricate or ascending, 3.5–12(–15) mm. |
Fruits | linear, (torulose), (1–)1.6–3(–3.5) cm × 0.9–1.5 mm; (valves glabrous or, rarely, pilose); ovules 10–30 per ovary; style 0.6–1.6(–2) mm. |
Seeds | brown, oblong, 1.1–1.5 × 0.8–1 mm, (compressed, sometimes narrowly winged apically). |
2n | = 16. |
Cardamine impatiens |
|
Phenology | Flowering May–Jul. |
Habitat | Streamsides, slopes, roadsides, fields, disturbed areas |
Elevation | 0-200 m (0-700 ft) |
Distribution |
CT; KY; MI; MN; NH; OH; PA; VA; WV; ON; Eurasia [Introduced in North America; introduced also in South Africa]
|
Source | FNA vol. 7, p. 476. |
Parent taxa | Brassicaceae > tribe Cardamineae > Cardamine |
Sibling taxa | |
Synonyms | C. impatiens var. angustifolia |
Name authority | Linnaeus: Sp. Pl. 2: 655. (1753) |
Web links |