270 University of California Publications in Botany [VOL. 9 



2. OENOTHERA 



1. Oenothera xylocarpa Coville, Contr. Nat. Herb., vol. 4, p. 105. 

 1893. 



Type locality. "On the west side of Whitney meadows, Sierra 

 Nevada, Tulare County, California." 



Range. Southern Sierra Nevada. 



Zone. Canadian. 



Specimens examined. Volcano meadows (formerly called Whitney 

 meadows), Hall and Babcock 5489; Fish Creek, Tulare County, 8,500 

 feet, Hall and Babcock 5214; north side of Toowa Range, Tulare 

 County, 9,800 feet, H. M. and G. R. Hall 8402; sandy plains about 

 Whitney meadows, 9-10,000 feet, Purpus 1386. 



3. EPILOBIUM 



Leaves pale and glaucous or covered with whitish bloom. 



Leaves broadly ovate, repand denticulate; flowers large, petals % inch or 



longer, deeply lobed .-1. E. obcordatum 



Leaves oblong-lanceolate, repand denticulate or nearly entire; flowers small, 



petals about % inch long, merely notched 2. E. glaberrimum 



Leaves green, not glaucous nor covered with bloom. 

 Leaves small (few more than % inch long). 



Plants crisp-hairy throughout 3. E. ursinum var. falcatum 



Plants glabrous or at most minutely glandular-puberulent above. 



Stems decumbent with nodding tip and leafy to the top; leaves, at least 



the lowest, wing-petioled 4. E. anagallidifolium 



Stems erect to the summit with the leaves remote above, crowded below; 



leaves somewhat tapering at base, but not petioled 



5. E. oregonense 



Leaves larger (mostly over % inch long). 



Leaves all sessile 6. E. brevistylum 



Leaves petioled. 



Leaves ovate, acute, dark green, the upper longer than the internodes; 



flowers pink or violet 7. E. Hornemanni 



Leaves ovate-spatulate, obtuse, thin and light green, shorter than the 

 internodes; flowers white or pale pink 8. E. alpinum 



1. Epilobium obcordatum Gray, Proc. Am. Acad., vol. 6, p. 532. 

 1866. 



Type locality. In the Sierra Nevada, at Squaw Valley and 

 Ebbett's Passes, alt. 8,000-8,500 feet." 



Range. Sierra Nevada north and east to Mt. Shasta, and moun- 

 tains of central Oregon (Idaho?) ; on the East Humboldt Mountains, 

 Nevada. 



Zone. Arctic-alpine and Hudsonian. 



