Cardamine impatiens |
Cardamine macrocarpa |
|
---|---|---|
narrow-leaf bitter-cress |
largeseed bittercress |
|
Habit | Biennials or, rarely, annuals; usually glabrous, rarely sparsely pubescent basally. | Annuals; glabrous or sparsely puberulent. |
Rhizomes | absent. |
absent. |
Stems | erect, (angled, sometimes flexuous), unbranched basally, usually branched distally, (1.2–)2–6.5(–9) dm. |
(simple or several from base), erect or decumbent, (flexuous or straight, narrowly winged-angled), unbranched or branched distally, (1.4–)2–4.5(–5.3) dm. |
Basal leaves | (often withered by flowering), rosulate, similar to cauline, with fewer distal leaflets. |
(soon withered), not rosulate. |
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. |
3–9, middle ones 5–9-foliolate, petiolate, leaflets petiolulate or subsessile; petiole 1–3 cm, base not auriculate; lateral leaflets similar to terminal, blade often smaller, with oblique base, distal leaflets subsessile, blade smaller and narrower distally; terminal leaflet (petiolule 0.2–0.8 cm), blade usually broadly ovate to narrowly lanceolate, rarely oblong, 0.7–2 cm × 2–10 mm, base cuneate to rounded, margins repand, crenate, or 3-lobed. |
Racemes | ebracteate. |
ebracteate, (rachis slightly to strongly flexuous or geniculate). |
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 oblong, 2–3.5 × 0.7–1.2 mm, lateral pair not saccate basally; petals white, linear, 6–8 × 0.7–1 mm; filaments: median pairs 4–5 mm, lateral pair 3.5–4 mm; anthers oblong, 0.7–1 mm. |
Fruiting pedicels | divaricate or ascending, 3.5–12(–15) mm. |
horizontal to divaricate or ascending, (3–)4–9(–12) 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, (2.5–)3–4.6 cm × 1.7–2.1 mm; ovules 14–22 per ovary; style 1–3 mm. |
Seeds | brown, oblong, 1.1–1.5 × 0.8–1 mm, (compressed, sometimes narrowly winged apically). |
dark brown, oblong, 2–2.5 × 0.9–1.2 mm. |
2n | = 16. |
|
Cardamine impatiens |
Cardamine macrocarpa |
|
Phenology | Flowering May–Jul. | Flowering Mar–Sep. |
Habitat | Streamsides, slopes, roadsides, fields, disturbed areas | Rock crevices and ledges, gravel bars of mountain streams, moist rocky stream banks, shaded loamy forest floors |
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]
|
TX; Mexico (Coahuila, Nuevo León) |
Discussion | Cardamine macrocarpa is known from the Chisos Mountains, Brewster County. The characters by which var. texana is said to differ from var. macrocarpa are artificially drawn, and the style length, presence or absence of indumentum on the pedicels, and degree of flexuosity of the raceme rachises do not correlate and can vary within a given area. For these reasons, we do not recognize infraspecific taxa in Cardamine macrocarpa. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 7, p. 476. | FNA vol. 7, p. 476. |
Parent taxa | Brassicaceae > tribe Cardamineae > Cardamine | Brassicaceae > tribe Cardamineae > Cardamine |
Sibling taxa | ||
Synonyms | C. impatiens var. angustifolia | C. macrocarpa var. texana |
Name authority | Linnaeus: Sp. Pl. 2: 655. (1753) | Brandegee: Zoë 5: 233. (1906) |
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