COLORADO ANIMALS AND PLANTS NEW IN 1911 77 



aments, larger and more irregularly cleft bracts, larger anthers, and broader, shorter, 

 somewhat translucent cupulae of the pistillate flowers. The leaves become golden 

 or orange in the fall; those of tremuloides light yellow. From observations made 

 in New York state, I feel satisfied that the Colorado tree is not quite like the true 

 tremuloides, but how much of the difference is really racial or specific remains to be 

 seen. Daniels proposes to call our tree P. tremuloides aurea. An earlier name, if the 

 plant is regarded as a variety, is P. tremuloides minor Cockerell, Nature Notes, Jan., 

 1891, p. 14; type from gulch above Micawber Mine, Custer Co., Colo. 



Family BRASSICACEAE 



Erysimum cockerellianum Daniels, Univ. of Missouri Studies, II, No. 2, p. 131. Boulder 

 County. This is a new name for E. alpestre (Ckll.), preoccupied. Rydberg refers 

 it to E. wheeleri S. Wats., which is, however, a tall plant from San Francisco Mountain, 

 Arizona, apparently distinct. 



Family CUNONIACEAE? 

 fCarpolithes macrophyllus Cockerell, Torreya, Nov., p. 235. Miocene shales of Florissant 

 (W. P. Cockerell). 



Family ROSACEAE 



Acomastylis arapahoensis Daniels, Univ. of Missouri Studies, II, No. 2, p. 146. T. I. 

 Arapahoe Peak, Boulder County, at timber-line, 11,500 ft. (Daniels). 



Rosa pratincola angustiarum Cockerel] in Daniels, t. c, p. 148. T. 1. Boulder Canyon, 

 near Castle Rock, 7,340 ft. (Cockerell). The name Rosa pratincola is a homonym, 

 and Dr. Greene has proposed a substitute. 



R. pratincola setulosa Cockerell in Daniels, p. 148. T. 1. Bluebell Canyon, Boulder, 

 1910 (Cockerell). New combinations will be necessary for angustiarum and setulosa, 

 but these are not offered at the present time, owing to uncertainty regarding the 

 number of species to be recognized in this group. Mr. D. M. Andrews and the 

 writer propose to grow the various forms side by side, and hope eventually to be able 

 to revise the Colorado species. The indications are that these plants include a great 

 number of minor types, like the R. canina group of Europe, and consequently the 

 number of true "species" will remain a matter of opinion. 



The published description of setulosa merely states "fruit bristly." To this 

 should be added the following, based on the original type: 



Petals very pale pink, practically uniform; diameter of flower 42 mm.; sepals 

 foliolar-tipped, not lobed, with many stalked glands; leaflets 9 to n, pale beneath, 

 sessile or almost, simply serrate; stipules entire. Runs straight to R. pratincola in 

 Rydberg's key {Flora of Colorado), and in Nelson's to arkansana except for the bristly 



fruit. 



Family AMYGDALACEAE 



Prunus prunella Daniels, t. c, p. 151. T. 1. Mesa at entrance of Gregory Canyon, and 

 facing the first Flat-iron, Boulder (Daniels). 



Family FABACEAE 

 Apios apios boulderensis Daniels, t. c, p. 161. T. 1. Gulch at foot of Flagstaff Hill, 

 Boulder, 1906 (Daniels). 



