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Cardamine pensylvanica Muhl. ex Willd.
PENNSYLVANIA BITTERCRESS
Life   Plantae   Dicotyledoneae   Brassicaceae   Cardamine

Cardamine pensylvanica
© Les Mehrhoff, 2008-2010 · 5
Cardamine pensylvanica

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Cardamine pensylvanica
© Les Mehrhoff, 2008-2010 · 4
Cardamine pensylvanica
Cardamine pensylvanica
© Les Mehrhoff, 2008-2010 · 4
Cardamine pensylvanica

Cardamine pensylvanica
© Les Mehrhoff, 2008-2010 · 3
Cardamine pensylvanica
Cardamine pensylvanica
© Les Mehrhoff, 2008-2010 · 2
Cardamine pensylvanica

Cardamine pensylvanica, plant
© Kay Yatskievych, 2003 · 1
Cardamine pensylvanica, plant

Associates · map
FamilyScientific name @ source (records)
Peronosporaceae  Peronospora parasitica @ BPI (9)

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Following modified from Delaware Wildflowers
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Delaware Wildflowers  •  Scientific names

Cardamine pensylvanica Muhl. ex Willd. Pennsylvania Bittercress
Brassicaceae — Mustard family
Native
Cardamine pensylvanica
White Clay Creek State Park -- Creek Road
May 2004 Cardamine pensylvanica
Middle Run Valley Natural Area
April 2008 Cardamine pensylvanica
Woodlawn Tract
April 2016 Cardamine pensylvanica
Middle Run Valley Natural Area
April 2020

Guide to Cardamine of Delaware

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Photos copyright David G. Smith

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FNA | Family List | FNA Vol. 7 | Brassicaceae | Cardamine

34. Cardamine pensylvanica Muhlenberg ex Willdenow, Sp. Pl. 3: 486. 1801.

Cardamine flexuosa Withering subsp. pensylvanica (Muhlenberg ex Willdenow) O. E. Schulz; C. hirsuta Linnaeus var. pensylvanica (Muhlenberg ex Willdenow) P. W. Graff; C. multifolia Rydberg; C. pensylvanica var. brittoniana Farwell; C. rotundifolia Michaux var. diversifolia O. E. Schulz; Dracamine pensylvanica (Muhlenberg ex Willdenow) Nieuwland

Annuals or biennials; sparsely hirsute basally, glabrous distally. Rhizomes absent. Stems (simple from base), erect, (not flexuous), unbranched or branched distally, (0.5-)1.5-5.5(-7) dm. Basal leaves (soon withered), not rosulate, similar to proximalmost cauline leaves, 4-15 cm. Cauline leaves (3-)5-20(-35), pinnately (5 or) 7-13(-19)-foliolate, sometimes appearing pinnatisect, lobe number similar to leaflets (middle and proximal ones 2-11 cm), petiolate, leaflets petiolulate, subsessile, or sessile; petiole (0.4-)1-3.5(-4.5) cm, base not auriculate, (often sparsely hirsute); lateral leaflets shortly petiolulate or sessile, (decurrent on rachis smaller than terminal, distalmost blades narrower, with fewer lobes or leaflets), margins entire or crenate; terminal leaflet (subsessile or petiolule to 1 cm), blade suborbicular, obovate to oblanceolate, or elliptic, 1.3-3(-4) cm × 6-25 mm, base often cuneate, margins entire, repand, or obscurely 3 or 5-lobed. Racemes ebracteate. Fruiting pedicels divaricate-ascending, (3-)4-10(-13) mm. Flowers: sepals oblong, (1-)1.3-2.3 × 0.5-1 mm, lateral pair not saccate basally; petals white, narrowly spatulate to oblanceolate, 2-3.5(-4) × 0.8-1.5 mm, (not clawed); filaments: median pairs 1.5-2.5 mm, lateral pair 1-2 mm; anthers ovate, 0.2-0.3 mm. Fruits linear, (torulose), (1.4-)1.7-2.7(-3.2) cm × 0.8-1.1 mm; ovules 40-80 per ovary; style 0.5-1 mm. Seeds brown, oblong to ovoid, 0.7-1.1 × 0.5-0.8 mm. 2 n = 32, 64.

Flowering Apr-Jul. Marshes, streams, swamps, ditches, seepage, springs, lake margins, mesic bottomland and upland forests, wet areas, ledges of sheltered bluffs, banks and shallow water of streams and spring branches, margins of crop fields, waste ground; 0-2800 m; Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Ont., P.E.I., Que., Sask., Yukon; Ala., Alaska, Ark., Calif., Colo., Conn., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., Nev., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.C., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Wyo.

We have not seen material of Cardamine pensylvanica from Nebraska or South Dakota; it is very likely that the species grows in these states as well.

Updated: 2021-01-16 03:39:54 gmt
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