CRUCIFERAE. 



[VOL. II. 



7. Cardamine Clematitis Shuttlw. 

 Mountain Bitter-cress. (Fig. 1730.) 



Cardamine Clematitis Shuttlw.; S. Wats. Bibl. In- 

 dex, 1:53. l8 78. 



Glabrous, dark green, somewhat succulent, 

 stem weak, ascending or erect, slender, 5 '-is' 

 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; flowers in short ra- 

 cemes, white, 3 // -4 // wide; pedicels ascending, 

 3 // -6" long; pods ascending or divergent, i'-i %' 

 long, less than i" wide; style i // -2 // long, subu- 

 late. 



In wet woods, high mountains of southwestern 

 Virginia and North Carolina to Alabama. May-July. 



8. Cardamine bellidifdlia L. Alpine Cress. 

 (Fig. 1731.) 



Cardamine bellidifolia L. Sp. PI. 654. 1753. 



Tufted, glabrous, a'-s' high, with fibrous roots. Lower 

 leaves long-petioled, ovate, obtuse, the blade 4 // -6 // long, 

 3 /x -4 /x broad, abruptly contracted into the petiole, entire, or 

 with a few rounded teeth; upper leaves similar, shortcr-pe- 

 tioled; flowers 1-5, white; petals about twice the length of 

 the calyx; pods erect, linear, i' long, i" wide, narrowed at 

 each end; pedicels i // -3 // long; style stout, less than i" long. 



Alpine summits of the White Mountains, N. H.; Mt. Katahdin, 

 Me.; Greenland and arctic America; the Canadian Rocky Moun- 

 tains; California. Also in Kurope. July. 



r \ 



9. Cardamine purpurea (Torr.) Brit- 

 ton. Purple Cress. (Fig. 1732.) 



Arabi$ rhomboidea var. purpurea Torr. Am. 



Journ. Sci. 4: 66. 1822. 

 Arabis Douglassii Torr.; T. & G. Fl. N. A. i: 83. 



As synonym. 1838. 

 Cardamine Douglassii Britton, Trans. N. Y. Acad. 



Sci. 9: 8. 1889. 



Glabrous, generally slender, 6 / -i5 / high from 

 tuberiferous rootstocks. Basal leaves slender- 

 petioled, about i' broad, ovate or orbicular, 

 cordate, thickish; lower stem-leaves similar, 

 but shorter-petioled, the upper sessile, dentate 

 or entire; pedicels 4 // -i2 // long; flowers pur- 

 ple, showy, 5 // -io // broad; pods nearly erect, 

 i' long, i" broad, pointed at each end; pedicels 

 4 // -i2 // long; style i" long. 



In cold, springy places, Quebec and arctic 

 America to the Canadian Rocky Mountains, south 

 to Maryland and Wisconsin. Blooming two or 

 three weeks earlier than the next, and more 

 abundant northward. April-May. 



