Tennessee Flora. 87 



cia Fries. Horse-radish. Escaped from gardens into low 

 grounds. Adventive from Europe. Summer. 



R. Americana (A. Gray) Britton. Nasturtium lacustre A.. 

 Gray. Swamps along Tennessee and Cumberland Rivers. 

 Summer. 



CARDAMINE L. 



Cardamine Pennsylvanica Miihl. Bitter cress. On wet 

 lands. O. S. April-June. 



C. arenicola Britt. Moist, sandy soil. In Tennessee, ac- 

 cording to Illustrated Blora. March, April. 



C. parvifiora L. C. hirsuta var. parviflora A. Gray. Dry 

 woodlands. O. S. April, May. 



*C. Clematitis Shuttlw. Summits of Smoky Mts. May- 

 July. 



C. purpurea (Torr.) Britton. Arabis rhomboidea var. pur- 

 purea Torr. Hiwassee Valley. A. Ruth. Apr^il, May. 



C. bulbosa (Schreb.) B. S. P. C. rhomboidea DC. Low,, 

 wet ground. O. S. April. 



C. rotundifolia Michx. Near Marion, S. W. Va. J. K. 

 Small. May, June. 



DENTARIA L. 



Dentaria laciniata Miihl. Pepper root. In moist, rich 

 woods. O. S. . March-May. 



D. diphylla Michx. Shady ravines. O. S. Nashville- 

 Banks of Cumberland River. April. 



D. heterophylla Nutt. Woodlands. O. S. April. 



D. mUltifida Miihl. E. Tenn. Cave Spring. March, April. 



LEAVENWORTHIA Torr. 



Leavenworthia unifiora (Michx.) Britton. L. Michauxii 

 Torr. Open, moist grounds. Nashville. Cedar glades. 

 April, May. 



L. torulosa A. Gray. Cedar glades, with the former. April, 

 May. 



fL. stylosa A- Gray. Cedar glades at Lavergne. All three 

 often in close proximity. April, May. 



*C. Clematitis Shuttlw. Smooth; earliest leaves reniform, nearly- 

 entire; lower stem leaves broadly trilobed, the middle lobe larger, reni- 

 form-cordate, or angularly-trilobed; upper ones, oblong, three-lobed; 

 petioles with an arrow-shaped appendage at the base; racemes, short, 

 loose; petals, white, spatulate-obovate, twice as long as the calyx; 

 silique, narrow-linear, compressed, tipped with the long style. 



fL. stylosa Gray. Slender, stemless; silique, oval or broadly oblong 

 (2 inches long), plain, surmounted by a slender style fully two inches 

 in leilgth; only from three to six seeds, orbicular, distinctly winged; 

 embryo as in the preceding; petals, pure golden-yellow. 



