230 University of California Puhlications in Botany [Vol. 9 



4. AMELANCHIER 



Plant glabrous throughout; leaf tip retuse or truncate; leaf not cordate at base 

 1. A. glabra 



Plant somewhat tomentulose, at least the ovary hirsute; leaves round-eonlate 

 2. A. siskiyouensis 



1. Amelanchier glabra Greene, Fl. Fran., p. 52. 1891. 



Type locality. — ■' ' In the Donner Lake region of the Sierra Nevada. ' ' 



Range. — Sierra Nevada. 



Zone. — Border of Transition and Canadian. 



Specimens examiined. — Near Donner Lake, Torrey 126 ; above Don- 

 ner Lake toward Pass, Heller 7176; southern Sierra, nine miles west 

 of Mt. Brewer (said on label to have been collected on the State Sur- 

 vey, but without number). 



Dr. Nelson accords this species admission to the flora of Colorado 

 (Coulter-Nelson, New Man., p. 266) for the reason that he regards 

 A. polycarpa Greene (Pitt., vol. 4, p. 127. 1900) as a synonym; I 

 have not had an opportunity of examining the basis of A. polycarpa, 

 but P. C. Standley, after seeing the material in Dr. Greene's her- 

 barium, considered the Colorado plant unlike that of our region 

 (Standley, Proc. Biol. Soc. Wash., vol. 27, pp. 197-198. 1914). 



2. Amelanchier siskiyouensis C. K. Schneider, Handb. d. Laub- 



holzk., vol. 1, p. 735. 1906. 



Type locality. — "Gebirge in Calif., bis 2,000 m. " Type Hansen 

 230. 



Range. — Central Sierra Nevada to the mountains of Northern 

 California (see note below). 



Zone. — Canadian. 



Specimen examined. — Silver Lake, Amador County, 8,500 feet, 

 Hansen 230. 



Dr. L. R. Abrams"^ suggests that the range of this species should 

 possibly be extended to include certain collections made in the San 

 Bernardino Mountains of southern California (Dry Lake Caiion, 9,000 

 feet, Ahramis and McGregor 785). 



Amelanchier alnifoliu Nutt. (Jour. Acad. Phila., vol. 7, p. 22. 

 1834), with which the two species last named have been confused and 

 from which they are separated by characters none too precise, is a 

 common shrub ranging widely in the west and abundant in the Sierra 

 below our borders or just meeting them. 



