SAXIFKAGACE^E. (SAXIFRAGE FAMILY.) 91 



t- - Calyx adherent to the ovary below : stem leaves alternate. 



w- Sepals distinct or coherent at base. 



= Petals yellow. 



2. S. HirculllS, L. Leaves lanceolate, nerved, not dilate: pedicels and 

 upper part of the 1 to 6-flowered stem more or less hairy, not glandular : sepals 

 usually ciliate, much shorter than the very large petals. From Colorado to 

 the Arctic Sea. 



3. S. flagellaris, Willd. Glandular-pubescent, 1 to 5-flowered : stolons 

 from the axils of the radical leaves long and filiform, naked and rooting at the 

 ends : leaves obovate-spatulate, ciliate ; the lower much crowded ; the upper 

 oblong or linear : flowers large : sepals very glandular. From the high 

 mountains of Colorado to the Arctic regions. 



4. S. aizoides, L. Low, 3 to 5 inches high, in tufts, with few or several 

 corymbose flowers : leaves linear-lanceolate, entire, fleshy, distantly spinulose- 

 ciliate : petals spotted with orange. " Alpine rivulets on the Rocky Moun- 

 tains" (Drummond), throughout Arctic America, and found in some of the 

 Atlantic States. 



5. S. chrysantha, Gray. Dwarf, cespitose, shoots creeping: leaves rosu- 

 late, imbricated, oblong-ovate, thick, very smooth : stem filiform, few-leaved, 

 slightly glandular-pubescent, 1 to 2 inches high, 1 to 3-flowered : calyx segments 

 refiexed. Proc. Am. Acad. xi. 83. The S. serpylli folia of Fl. Colorado and 

 Hayd. Hep. 1871. High alpine regions of the Colorado Rocky Mountains. 



= = Petals white or cream-color. 



6. S. CSBSpitOSa, L. Dwarf '(1 to 2 inches high), cespitose: leaves glandu- 

 lar-pubescent, 3 to 5-cleft, segments broadly linear and obtuse ; the upper leaves 

 linear and entire : flowering stems with a few scattered leaves, glandular, 1 to 

 4-flowered. Mountains of Colorado and extending northward to lat. 56. 



7. S. cemua, L. Glabrate or glandular-pubescent: stems granulate at 

 base, weak, 2 to 5 inches high : lower leaves reniform, broadly toothed or lobed ; 

 the upper ones bearing little bulbs in their axils : flowers often solitary, terminal, 

 pendulous : petals retuse. Mountains of Colorado and northward through- 

 out the Arctic regions. 



8. S. bronchialis, L. Stems slender, producing short branchlets : leaves 

 linear, rather coriaceous, finely ciliate, mucronate-pointed, crowded below: flowers 

 corymbose on a long, slender, bracted peduncle : petals marked with numerous 

 purplish spots. From Colorado northward to the N. W. Coast. 



M. -w Sepals coherent at least to the middle : petals not yellow. 



9. S. rivularis, L. Small: stems weak, 3 to 5-floivered: lower leaves 

 rounded, 3 to 5-lobed, on slender petioles, the upper lanceolate : petals white, 

 ovate. Mountains of Colorado and northward ; also in the White Moun- 

 tains. 



10. S. adscendens, L. Glandular-pubescent: stems 1 to 3 inches high, 

 erect : leaves cuneate-ovate, 3 to 5-toothed at the apex, the earlier spatulate and 

 entire, radical ones crowded : branchlets 3-flowered : petals pinkish or yellowish 

 white. Mountains of Colorado. 



11. S. Jamesii, Torr. Glandular-puberulent : stems 2 to 6 inches high 

 from a thick caudex, 5 to 10-flowered : radical leaves reni form-cordate, smooth- 

 ish, crenately-toothed or -lobed ; cauline few, the uppermost bract-like, cuneiform : 



