Cardamine bulbosa |
Cardamine macrocarpa |
|
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bulb bittercress, bulbous bitter-cress, spring cress |
largeseed bittercress |
|
Habit | Perennials; glabrous or sparsely pubescent distally. | Annuals; glabrous or sparsely puberulent. |
Rhizomes | (tuberous at stem base, sometimes also at intervals) subglobose, lobed, 4–15 mm diam. (fleshy). |
absent. |
Stems | erect, unbranched, (1–)2–6 dm, glabrous or sparsely pubescent on distal 1/2 (trichomes 0.02–0.1 mm). |
(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 | (soon withered), not rosulate. |
|
Rhizomal leaves | simple, (2–)4–13(–16) cm; petiole (1.5–)2.5–10(–13) cm; blade usually reniform to cordate or ovate, rarely oblong, (1–)2–4(–6) cm, base obtuse to cordate, margins usually repand or entire, rarely shallowly dentate. |
|
Cauline leaves | (2–)4–10(–14), simple, petiolate or sessile; (middle ones) shortly petiolate or (distally) sessile, base not auriculate; blade ovate to oblong, or oblong-linear to lanceolate, 3–6(–9) cm × 10–30(–45) mm, margins entire, repand, or dentate (margins minutely pubescent). |
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, 2.5–4.5 × 1.5–2 mm, lateral pair not saccate basally, (glabrous); petals usually white, rarely pale pink, obovate, (6–)7–12(–16) × 3–5 mm, (short-clawed, apex rounded); filaments: median pairs 4.5–7 mm, lateral pair 2–3.5 mm; anthers oblong, 1–1.5 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 | ascending to divaricate, (10–)15–22(–30) mm. |
horizontal to divaricate or ascending, (3–)4–9(–12) mm. |
Fruits | linear, 2–3.5(–4) cm × 1.4–1.7 mm; ovules 14–24 per ovary; style 2–4(–5) mm. |
linear, (2.5–)3–4.6 cm × 1.7–2.1 mm; ovules 14–22 per ovary; style 1–3 mm. |
Seeds | dark orange to greenish yellow, oblong or globose, 1.7–2.1 × 1–1.4 mm. |
dark brown, oblong, 2–2.5 × 0.9–1.2 mm. |
2n | = 16, 56, 64, 80, 96, 112. |
|
Cardamine bulbosa |
Cardamine macrocarpa |
|
Phenology | Flowering Mar–Jun. | Flowering Mar–Sep. |
Habitat | Wet grounds, low woodland, moss hummocks, alluvial woods, grassy floodplains, wet pastures, meadows, pinelands, creek bottoms, stream banks, sandy bottoms, ditches, mesic or wet forests, swamps, marshes, seepy bluffs | Rock crevices and ledges, gravel bars of mountain streams, moist rocky stream banks, shaded loamy forest floors |
Elevation | 0-900 m (0-3000 ft) | |
Distribution |
AL; AR; CT; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; NC; NE; NH; NJ; NY; OH; OK; PA; SC; SD; TN; TX; VA; VT; WI; WV; MB; ON; QC
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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. 469. | FNA vol. 7, p. 476. |
Parent taxa | Brassicaceae > tribe Cardamineae > Cardamine | Brassicaceae > tribe Cardamineae > Cardamine |
Sibling taxa | ||
Synonyms | Arabis bulbosa, Arabis rhomboidea, C. rhomboidea, C. rhomboidea var. hirsuta, C. rhomboidea var. parviflora, C. rhomboidea var. pilosa, Dentaria rhomboidea, Dracamine bulbosa | C. macrocarpa var. texana |
Name authority | (Schreber ex Muhlenberg) Britton: Prelim. Cat., 4. (1888) | Brandegee: Zoë 5: 233. (1906) |
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