Saxifragaceae 143 



toothed, mostly above the middle. Flower- 

 stems solitary or several together, widely 

 branching, bracts much smaller than the 

 leaves ; flowers terminating the stem, branches, 

 and branchlets, but on many of the ultimate 

 branchlets represented by clusters of green 

 bulblets; sepals oblong-ovate to triangular- 

 ovate, J of an inch or less long, purple, 

 reflexed; petals white, J of an inch long or 

 less, the three upper with lanceolate or 

 oblong-lanceolate blades; two lower with 

 elliptic or spatulate-elliptic blades ; seed pods 

 1 of an inch long with diverging tips. 

 The commonest form in the Selkirks, 

 everywhere along streams and banks. 



Caudex horizontal or ascending, 

 Leptarrhena 



pyrolifolia clothed with folded leaf bases. 

 (D. Don.) Leaves leathery, oblong, orsome- 

 R - Br - times slightly broadest above or 



Leptarrhena. ^ Q ^ ^ Q middle, lj- 3 l inches 



long, obtuse, serrate or crenate-serrate, deep 

 green and lustrous above, paler beneath, nar- 

 rowed into winged petiole-like bases. Flower- 



