1921] Smiley: Flora of the Sierra Nevada of California 169 



2. Polygonum imbricatum Nutt., in Wats., Am. Nat., vol. 7, p. 665. 



1873. 



P. Watsoni Small, Monogr. N. Am. Polygonum, p. 138, pi, 56. 1895. 



Type locality. — ' ' Frequent in the mountains, alpine and subalpine, 

 from Colorado to Oregon and northern California." 



Range. — Washington south to California and east to Colorado. 



Zone. — Canadian and Hudsonian. 



Specimens examined. — Glen Alpine trail to Mt. Tallac, Dudley, 

 June 28, 1900, in part; Donner Lake, Heller 6929; Twin Lakes, 8,500 

 feet, Alpine County, Hansen 311 ; Gilmore Lake on Mt. Tallac, 8,600 

 feet, Smiley 377 ; Snow Creek, Yosemite, 6,800 feet. Hall 9187 ; Silver 

 Mountain, Yosemite, Hooker and Gray in 1877 ; Rowell meadow, 

 Fresno County, Dudley, August 23, 1904; Kaweah meadow, Tulare 

 County, 7-8,000 feet, Dudley 2197; Cathedral trail to Mt. Tallac, 

 Tahoe, 6,700 feet. Smiley 209 ; sandy flat near Dark Hole, Tioga Road, 

 Yosemite, 7,600 feet. Smiley 683 ; Nellie Lake meadow, Fresno County, 

 8,700 feet. Smiley 608; Round Meadow, Fresno County, 7,100 feet. 

 Smiley 581. 



3. Polygonum Kelloggii Greene, Fl. Fran., p. 134. 1891. 



Type locality. — -"Common in the Donner Lake Region of the 

 Sierra." 



Range. — California to Wyoming and Colorado, north to Wash- 

 ington and Alberta. 



Zone. — Transition and Canadian. 



Specimens examined. — Fallen Leaf Lodge, Tahoe, 6,900 feet, 

 Abrams 4873 ; Lake Tenaya, Yosemite, sandy flats. Smiley 690 ; 

 Tuolumne meadows, sandy spots along the river, 8,500 feet. Smiley 

 710. 



4. Polygonum Douglasii var. latifolium Greene, Bull. Calif. 



Acad., vol. 1, p. 125. 1885. 

 P. tenue var. latifolium Engelm., in Wats., Bot. Calif., vol. 2, p. 12. 1880. 



Type locality. — Not given. 



Range. — Washington and Idaho southward to California, Arizona, 

 and New Mexico. 



Zone. — Canadian. 



Specimens examined. — Above Suimnit, Smiley 438; Caple's Lakes, 

 Alpine County, 8,500 feet, Hansen 753 ; lower end of Donner Lake, 

 Heller 6892; foot of Angora Peak, Tahoe, 6,400 feet, Smiley 306; 



