Vo. II.) MUSTARD FAMILY. 129 
4. Cardamine arenicola Britton. 
Sand Bitter-cress. (Fig. 1727.) 
Cardamine Virginica Michx. Fl. Bor. Am. 2: 29. 
1803. Not L. 1753. 
Cardamine arenicola Britton, Bull. Torr. Club, 19: 
220. 1892. 
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, 14//-114/’ 
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, 4’/-4’’ wide, their pedicels ascending; 
‘style almost wanting. 
__In moist or wet sandy soil, Connecticut to Flor- 
ida, Kentucky and Tennessee. March-April. 
5. Cardamine parviflora L. Small- 
flowered Bitter-cress. (Fig. 1728.) 
Cardamine parviflora I. Sp. Pl. Ed. 2, 914. 1763. 
Cardamine hirsuta var. sylvatica A. Gray, Man. 
Ed. 5,67. 1867. 
Glabrous or very sparingly pubescent, stem 
weak, erect or ascending, very slender or almost 
filiform, 2’-15’ long, usually leafy up to the ra- 
cemes, but the leaves scattered. Segments of 
the leaves numerous, oblong or linear, or the 
terminal ones sometimes orbicular, entire or 
sparingly toothed, %’/—2/’ wide; mature pods 1’ 
long or less, rather less than !4’’ 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 in the Alleghanies to Georgia. Also 
in northern Europe and Asia. April-May. 
‘6. Cardamine flexuosa With. Wood 
Bitter-cress. (Fig. 1729.) 
Cardamine flexuosa With. Bot. Arr. Brit. Pl. Ed. 
3, 3: 578. 1796. 
Glabrous, rather dark green, stem slender or 
rather stout, branched, leafy, 6-15’ tall. Leaf- 
‘segments obovate, oval, oblong or linear, the 
terminal one sometimes orbicular, narrowed 
rounded or subcordate at the base, 5’’—10’ wide, 
the lateral ones usually much narrower; flowers 
white, 2’’ broad; pods ascending or divergent, on 
spreading or ascending pedicels, 8’’-15’’ long, 
44’ wide or rather more; style 14’’ long or less. 
In wet woods, streams and mountain swamps, 
Maine to Michigan, south to North Carolina, espe- 
-cially in the mountains. Also in Europe and Asia, 
and apparently in Washington. May-Aug. 
9 
