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. glaberrimura 



Leaves green, not glaucous nor covered with bloom. 

 Leaves small (few more than % inch long). 



Plants crisp-hairy throughout 3. E. ursinuni 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. Homeraanni 



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. 



