92 SAXIFRAGACE^E. (SAXIFRAGE FAMILY.) 



raceme compound : petals purple, orbicular. Mountains of Colorado and 

 northward in the Tetou Range and the National Park. 



- -t- -i Calyx wholly adherent. 



12. S. debilis, Engelm. Glabrous or very sparingly glandular-pubes- 

 cent: stems weak, ascending, 2 to 4-flowered, 2 to 4 inches high: radical 

 leaves small, crenately lobed ; cauline 3-lobed or entire : petals white or pink- 

 ish, ovate, obtuse. Mountains of Colorado and northward into Wyoming. 



* * Stemless : petals white. 

 *- Calyx free from the ovary, or nearly so: sepals almost distinct, reflexed. 



13. S. punctata, L. Villous-pubescent or nearly glabrous : leaves long- 

 petioled, reniform or orbicular, equally and deeply dentate : scape slender, naked, 

 1 to l^feet high, the peduncles and pedicels of the usually open panicle glandu- 

 lar : petals oval or orbicular. Colorado, Utah, and northward into British 

 America. 



14. S. Stellaris, L., var. comosa, Poir. Leaves wedge-shaped, more or 

 less toothed: scape 4 to 5 inches high, bearing a small contracted panicle: many 

 or most of the flowers changed into little tufts of green leaves : petals un- 

 equal, lanceolate and tapering into the claw. Mt. Evans, Colorado (Greene); 

 also in Maine and far northward. 



- <- Calyx adherent to the ovary at base. 

 w- Sepals erect. 



15. S. nivalis, L. Leaves ovate or obovate, attenuate into a broad 

 petiole, unequally crenate-deutate : scape 2 to 5 inches high, capitately or sub- 

 cori/mbosel// several to many-jlowered : petals oblong: capsules purple. Colo- 

 rado and northward to Arctic America. 



16. S. Virginiensis, Michx. Like the preceding, but larger and more 

 open : scape a span to afoot high, at length loosely many-flowered in a paniculate 

 cyme : petals obovate. In the Rocky Mountains and Coast Ranges ; also com- 

 mon in the Atlantic States. 



M- -M. Sepals spreading, or at length reflexed. 



17. S. integrifolia, Hook. Leaves from ovate or obovate to lanceolate- 

 spatulate, 1 to 5 inches long, denticulate or entire, narrowed at base into a 

 very short and margined petiole : scape 1 to 3 feet high, viscid : flowers in 

 small clusters usually in a narrow thyrsiform panicle : petals obovate or 

 broadly spatulate. S. hieracifolia of Hayd. Rep. for 1871 and 1872. From 

 Colorado northward to the Yellowstone and westward to the Sierras. 



2. BOYKINIA, Nutt. 



Calyx 5-lobed. Petals entire, the base contracted into a short claw. 

 Perennial, with creeping rootstocks, leafy simple stems, and paniculate or 

 corymbose cymes of white flowers : the leaves all alternate, round-reniform, 

 palmately lobed and incised or toothed, the teeth with callous-glandular tips, 

 and the petiole mostly with stipule-like dilatations or appendages at base. 



1. B. major, Gray. Stem 2 or 3 feet high : leaves 4 to 8 inches in diam- 

 eter, 5 to 9-cleft : petioles abruptly appendaged at base, the lower with scari- 



