286 PHANEROGAMOUS PLANTS. 



account it is referred to the Himalayan genus Neillia by Bentham and 

 Hooker, Gen. PL] The same occurs in Oillenia, and still more mani- 

 festly in Dr. Gray's recently published genus Neviusa. 



2. Spiraea betul^efolia, Pall. 



Hab. Interior of Oregon and Washington Territory; frequent in 

 stony lands. — A shrub, usually 2 to 4 feet high, with pale purple 

 flowers. Ovaries glabrous. 



3. Spiraea Douglasii, Hook. 



Hab. Fraser River, and south to California. — The tomentum of the 

 lower surface of the leaves often rusty-colored, at least in dried speci- 

 mens. 



4. Spiraea Menziesii, Hook. 



Hab. Interior of Oregon and Washington Territory ; common near 

 streams. — This species is intermediate between S. tomentosa and S. 

 salicifolia; resembling the former in its inflorescence, and the latter 

 in its foliage. 



5. Spiraea ari^efolia, Smith. 



Hab. British Columbia and Washington Territory, also in Califor- 

 nia; common in most shady woods; and often 8 to 15 feet high. 



6. Spiraea Aruncus, Linn. 

 Hab. Puget Sound and Upper Columbia River, in shady places. 



