1921 ] Smiley: Flora of the Sierra Nevada of California 261 



34. CALLITRICHACEAE (WATER STARWORT FAMILY) 

 1. CALLITRICHE 



1. Callitriche stenocarpa Hegelm., Bot. Verein Brandenb., vol. 10, 

 p. 114. 1868. 



Type locality. ' ' Searsville, [California]." 



Range. Oregon and California? 



Zone. Canadian ? 



Specimens examined. Silver Lake, Amador County, 8,000 feet, 

 Hansen 729 ; Forks of Kern River, Tulare County, 10,000 feet, Dudley 

 2367 ; Upper Volcano meadow, south of Mt. Whitney, Dudley 2492. 



35. ACEEACEAE (MAPLE FAMILY) 

 1. ACER 



1. Acer, glabrum Torr. var. Torreyi (Greene), comb. nov. 



A. torreyi Greene, Pitt., vol. 5, p. 2. 1902. 



Type locality. "Californian Sierra at middle altitudes." 



Range. California north to Oregon. 



Zone. Transition and Canadian. 



Specimens examined. Above Donner Lake toward Donner Pass, 

 Heller 7043 ; Fallen Leaf trail to Mt. Tallac, 8,000 feet, Abrams 4828 ; 

 Glen Alpine, Tahoe, 6,800 feet, McGregor 176; below Lake Lucile, 

 Tahoe, Dudley, June 26, 1900; Yosemite, J. M. Hutchings in 1890; 

 Pyramid Peak, Tahoe, 8,900 feet, Smiley 111 ; Sequoia National Park, 

 near Wolverton Creek, Tulare County, A. Davidson 1694. 



la. Acer glabrum var. diffusum (Greene), comb. nov. 



A. diffusum Greene, Pitt., vol. 5, p. 2. 1902. 



A. bcrnardinum Abrams, Torreya, vol. 7, p. 219. 1907. 



Type locality. "Near the summit of the West Humboldt Moun- 

 tains, Nevada." 



Range. Mountains of Nevada and the Sierra Nevada. 



Zone. Hudsonian. 



Specimens examined. Whitney Creek, Tulare County, Culbert- 

 son (B4554); Kern Canon tributary, Culbertson (B4678). 



This is the maple of widest range in the west and several attempts 

 have been made to define specifically its many forms, as yet with 

 unsatisfactory results. Pax, in working up his revision (Pflanzenr., 

 "Bd. 4, no. 163 Aceraceae), saw reason to change his earlier opinion 



