This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Cardamine virginica Michx. Fl. Bor. Am. 2: 29. 1803. Not L. 1753.
Cardamine arenicola Britton, Bull. Torr. Club 19: 220. 1892.
Annual, glabrous, usually much branched from the base, leafy nearly or quite up to the racemes, erect, 6'-12' high. Segments of the leaves numerous, linear or linear-oblong, 1/2"-1 1/2" wide, obtusish, entire, or with 1-3 small teeth, those of the basal ones slightly wider than those of the upper; flowers about 2" broad, white; mature pods strictly erect, less than 1' long, 1/4"-1/2" wide, their pedicels ascending; styles almost wanting.
In moist or wet sandy soil, Connecticut to Florida, Kentucky and Tennessee. March-April.
Cardamine parviflora L. Sp. Pl. Ed. 2, 914. 1763. Cardamine hirsuta var. sylvatica A. Gray, Man. Ed. 5, 67. 1867.
Annual or biennial, glabrous or very sparingly pubescent, stem weak, erect or ascending, very slender or almost filiform, 2'-15' long, usually leafy up to the racemes, but the leaves scattered. Segments of the leaves numerous, oblong or linear, or the terminal ones sometimes orbicular, entire or sparingly toothed, 1/2"-2" wide; mature pods 1' long or less, rather less than i" wide, erect on ascending pedicels, 2"-5" long, the axis of the racemes commonly zigzag; flowers scarcely more than 1" broad, white; style almost wanting.
On dry rocks, Quebec to western Ontario and Oregon, south to Massachusetts and Georgia. Also in northern Europe and Asia. April-May.
Cardamine Clematitis Shuttlw.; S. Wats. Bibl. Index 1: 53. 1878.
Perennial, glabrous, dark green, somewhat succulent, stem weak, ascending or erect, slender, 5'-15' long. Leaves remarkably various, some of them of a single orbicular or reniform, deeply cordate, entire or undulate terminal segment, some of them with two additional ovate oblong or rounded lateral segments, the uppermost occasionally linear-oblong and entire; petioles of the stem-leaves sagittate at base; flowers in short racemes, white, 3"-4" wide; pedicels ascending, 3"-6" long; pods ascending or divergent, 1'-1 1/2' long, less than 1" wide; style 1"-2" long, subulate.