Genus 12. 



SAXIFRAGE FAMILY. 



6. Heuchera Curtisii T. & G. Curtis' 



Heuchera. Fig. 2178. 



H. Curtisii T. & G. ; A. Gray, Am. Journ. Sci. 42: 

 15. 1S41. 



H. roseola Rydb. ; Britton, Man. 481. 1901. 



Stem rather stout, i-3 high, leafy, gla- 

 brous below, puberulent above. Basal leaves 

 ovate to suborbicular, Ii'-q' wide, with rounded 

 lobes and broad mucronate teeth, glabrous or 

 sparingly pubescent and ciliate ; flowering- 

 calyx nearly regular, larger than in H. aincri- 

 caiia; petals purple or pink, usually much ex- 

 ceeding the calyx-lobes; stamens exserted. 



In woods and on river bluffs. New York to 

 Tennessee and South Carolina. May-July. 



8. Heuchera hispida Pursh. Rough 

 Heuchera. Fig. 2180. 



H. hispida Pursh. Fl. Am. Sept. 188. 18 14. 



Heuchera Richardsonii R. Br. Frank!. Journ. 

 766. pi. jg. 1823. 



Stem 2-4 tall, hirsutely-pubescent or 

 rarely nearly glabrous, usually leafless. 

 Leaves 2-3' wide, on long and slender 

 petioles, broadly ovate-orbicular, with 5-9 

 shallow rounded dentate lobes; panicle 

 strict, narrow ; flowering calyx campanu- 

 late, very oblique, 3"-5" long, its lobes 

 unequal; petals spatulate, slightly exceed- 

 ing the calyx-lobes ; stamens exserted. 



In woods, Virginia to western Ontario, west 

 to Kansas, Manitoba and Saskatchewan, south 

 in the Rocky Mountains to Idaho. May-June. 



7. Heuchera hirsuticaulis (Whee- 



lock ) Rydb. Rough-stemmed 



Heuchera. Fig. 2179. 



H. hispida hirsuticaulis Wheelock, Bull. Torr. 



Club 17 : 199. 1890. 

 Heuchera hirsuticaulis Rydb.; Britton, Man. 



482. 1901. 



Stem i-2i tall, villous-hirsute, leafless. 

 Leaves l4'-3^' wide, on slender petioles 

 which are pubescent like the stem, reniform 

 to orbicular-ovate, with 7-1 1 rounded 

 crenate-mucronate lobes ; panicle lax, rather 

 wide i^^flowering calyx campanulate, oblique, 

 2"-2J" long, its lobes unequal ; petals 

 broadly spatulate, equalling the calyx-lobes 

 or shorter; stamens long-exserted. 



In dry woods and on bluffs, Michigan to 

 Missouri, Indiana and Arkansas. May-June. 



