299] FLORA OF BOULDER, COLORADO I5I 



590. C. erythropoda Ashe, 1900 [C. Cerronis A. Nels., 1902-]. 

 Cerro haw. 



Banks of gulches in the mesas and lower foothills, 5700-6000 

 ft. (Daniels, 794). 

 Colorado. 



591. C. Doddsii Ramaley. Dodds's haw. 



Pole Canon (the type locality) ; also various localities in 

 Boulder Co., 5000-8000 ft. (Ramaley). 

 Colorado. 



592. C. Coloradoides Ramaley. False Colorado haw. 



Pole Caiion (the type locality) ; also gulches in the lower 

 foot-hills, 5500-7000 ft. (Ramaley). 

 Colorado. 



239. SORBTJS L. Mountain ash. 



593. S. scopulina Greene. Rocky Mountain mountain ash. 

 At entrance of Bear Cafion and very sparingly throughout 



the mountainous region, 6000-10000 ft. (Daniels, 764). 

 Alberta to Washington ; Colorado to Utah. 



Family 60. AMYGDALACEAE Reichenb. Peach family. 



240. PETJimS L. Plum. Cherry. 



594. P. Americana Marsh. American wild plum. 

 Mesas and lower foothills, 5700-7000 ft. (Daniels, 795). 

 New York to Montana ; Florida to Colorado. 



595. P. prunella Daniels. Nov. sp. Pygmy plum. 

 Undershrub, thornless, trailing or ascending, 3-6 dm. high 



with grayish bark, the new twigs reddish ; fruits lateral, soli- 

 tary in the specimens secured, on slender pedicels i cm. long; 

 drupes oblong, iV^-ij4 cm. long and i cm. wide when dried, 

 black-purple with but slight traces of bloom; pulp red-purple, 

 astringent but sweet and edible; stone oblong 12 mm. long 

 by 7 mm. wide, bean-shaped, flattish, rugose, the margins 

 slightly winged, the ends plainly so; leaves lanceolate, 3-5 cm. 

 long including the petiole, and 12-15 mm. wide in the middle, 

 sharply but not deeply serrate, entire toward the acuminate 



