Cardamine impatiens |
Cardamine microphylla |
|
---|---|---|
narrow-leaf bitter-cress |
small-leaf bittercress |
|
Habit | Biennials or, rarely, annuals; usually glabrous, rarely sparsely pubescent basally. | Perennials; usually glabrous, rarely sparsely hirtellous. |
Rhizomes | absent. |
cylindrical, slender, 0.7–1.5 mm diam. |
Stems | erect, (angled, sometimes flexuous), unbranched basally, usually branched distally, (1.2–)2–6.5(–9) dm. |
erect or ascending, unbranched, 0.3–1.5(–2) dm. |
Basal leaves | (often withered by flowering), rosulate, similar to cauline, with fewer distal leaflets. |
|
Rhizomal leaves | pinnately 5 or 7-foliolate, (1.3–)2.5–6.5 cm, (not fleshy), leaflets petiolulate; petiole (0.5–)1.5–5.5 cm; lateral leaflets similar to terminal, blade sometimes smaller; terminal leaflet (petiolule 0.15–0.7 cm), blade ovate to elliptic, (0.2–)0.4–1.2(–1.5) cm × (1–)2.5–6 mm, base cuneate to obtuse, margins entire, (apiculate). |
|
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. |
1–3, 5 or 7-foliolate, petiolate, leaflets petiolulate or subsessile; petiole 0.2–1.5 cm, base not auriculate; lateral leaflets similar to terminal; terminal leaflet (subsessile or petiolule to 0.2 cm), blade ovate to elliptic, 0.6–1.3 × 0.1–0.7 cm, base cuneate, margins entire. |
Racemes | ebracteate. |
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. |
sepals ovate to oblong, 3–4 × 1.8–2.5 mm, lateral pair slightly saccate basally; petals usually white, rarely lavender, broadly obovate, 7–10 × 3–6 mm, (clawed, apex rounded); filaments: median pairs 3–4.5 mm, lateral pair 2–3 mm; anthers oblong, 1–1.5 mm. |
Fruiting pedicels | divaricate or ascending, 3.5–12(–15) mm. |
erect to ascending, 7–15(–25) 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. |
linear, 2–3 cm × 1.2–1.7 mm; ovules 12–16 per ovary; style 1–2 mm. |
Seeds | brown, oblong, 1.1–1.5 × 0.8–1 mm, (compressed, sometimes narrowly winged apically). |
brown, oblong, ca. 1.5 × 1 mm. |
2n | = 16. |
= 28, 42, 64. |
Cardamine impatiens |
Cardamine microphylla |
|
Phenology | Flowering May–Jul. | Flowering Jul–Aug. |
Habitat | Streamsides, slopes, roadsides, fields, disturbed areas | Streamsides, sand and cobbles on gravel bars, shale banks, floodplains, alluvial sand between cobbles, moist moss, turf, seepage areas, meadows, wet grounds |
Elevation | 0-200 m (0-700 ft) | 0-1600 m (0-5200 ft) |
Distribution |
CT; KY; MI; MN; NH; OH; PA; VA; WV; ON; Eurasia [Introduced in North America; introduced also in South Africa]
|
AK; NT; YT; e Asia (Russian Far East, Siberia) |
Source | FNA vol. 7, p. 476. | FNA vol. 7, p. 477. |
Parent taxa | Brassicaceae > tribe Cardamineae > Cardamine | Brassicaceae > tribe Cardamineae > Cardamine |
Sibling taxa | ||
Synonyms | C. impatiens var. angustifolia | C. minuta |
Name authority | Linnaeus: Sp. Pl. 2: 655. (1753) | Adams: Mém. Soc. Imp. Naturalistes Moscou 5: 111. (1817) |
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