308 PHANEROGAMOUS PLANTS. 



3. Sedum Douglasii, HooJc. 



Hab. On rocks ; Upper Columbia and Kooskooskee Rivers. — The 

 root seems to be decidedly perennial in our specimens ; but Hooker 

 described it as annual. The stem often bears on its upper half, and 

 sometimes on the lower portion also, short bud-like branches, with 

 imbricated leaves and rudimentary cymes at the summit. When this 

 is the case, the proper terminal cymes are small and few-flowered. 



4. Sedum stenopetalum, Parsli. 



Hab. Upper part of the Columbia River j also found east of the 

 Rocky Mountains. 



3. T I L L ^E A, MicheU. 



1. Till^a angustifolia, Mitt, in Tott. & Gray. 



Hab. Margin of ponds near San Francisco, California. — A very 

 small species, creeping in the mud. Carpels 10-12-seeded. Seeds 

 linear-oblong, striated longitudinally. 



Oed. 36. SAXIFRAGACE^. 



1. SAXIFRAGA, Linn. 



1. Saxifraga integrifolia, Hook. 



Hab. Puget Sound ; in prairies and wet ground. — The leaves vary 

 from ovate to narrowly oblong. The longer-leaved forms resemble 

 S. Pennsylvanica. 



