SAXIFRAGACE^E 105 



spot; high, moist; Switzerland, Jura, Pyrenees, rare. 

 5. Cotyledon, L. ; stem 1-2 ft., much branched, leafy, radi- 

 cal and stem leaves oblong - obovate, glabrous, cartila- 

 ginous, with very thick margin, serrate, and furnished with 

 a row of calcareous pits, petals wedge-shaped, red at the 

 base or spotted ; high, moist ; Switzerland, Styria, Carin- 

 thia, Pyrenees, rare. S. stellaris, L. ; stem 1-2 in., 

 leafless, flowers small, radical leaves obovate-cuneate, 

 3-lobed at the apex, petals unequal; very common. 5. 

 glabrata, Sternb. ; similar, but very glabrous, leaves 

 smaller; high, local. 6*. Hostii, Tausch. (including 

 rhcetica, Kern.); stem-leaves with a marginal row of 

 calcareous pits, leaves of rosettes ligulate with cartila- 

 ginous margin, crenate ; Tirol, Carinthia, Carniola, local. 

 S.purpurata, Gaud. ; similar, but stem and branches purple, 

 petals with red veins; Switzerland, rare (Spliigen, 

 Devil's Bridge). S. maculata, Rchb. ; densely csespitose, 

 leaves cuneate, petals white with long purple spots ; 

 Switzerland, rare (St. Gothard, Rhone glacier). 



E. Flowers usually pure white ; leaves with calcareous 

 pits ; stem-leaves alternate : 5. crustata, Vost. ; rosette- 

 leaves furrowed, entire, linear, covered with a strong 

 incrustation ; Tirol, Carniola, Carpathians. vS. altissima, 

 Kern. ; stem 36 in., glandular-hairy, radical leaves ligu- 

 late, serrate, flowers in a corymbose panicle, sometimes 

 spotted, flower-stalk glandular; Styria. 5. diapensoides, 

 Bell. ; stem densely viscid-glandular, 2-3-flowered, petals 

 obovate-cuneate, milk-white, leaves linear-oblong; Swit- 

 zerland, Tirol, Dauphiny, local. 5. ccesia, L. ; rosette- 

 leaves densely crowded, recurved from the base, petals 

 obovate, obtuse ; high, frequent. 6". valdensis, DC. ; a 

 smaller plant, with smaller flowers, stem glandular ; 



