38 SILVA OF NORTH AMERICA. ROSACEX. 
Late in the autumn, when the foliage has assumed its brilliant hues and the slender bright red 
branches droop under the weight of its abundant blue-black fruit, this Rocky Mountain Hawthorn 
enlivens the banks of mountain streams and is an object of striking and remarkable beauty. 
1877 (in Herb. Gray). It has also been collected by Crandall in White River plateau in October, 1896 ; by Purpus at Sapinero on 
Gypsum Creek Cajion in August, 1894, and in the Black Cajion of the Elk Mountains in July, 1898; and by Jack at Grant, Park 
the Gunnison in August, 1896, and June, 1899; by Beadle at Wal- County, in October, 1898. 
cott on the Eagle River in July, 1896 ; by Sargent at Meeker on the 
EXPLANATION OF THE PLATE. 
PLaTE DCXXXVI. Cratacus SALIGNA. 
1. A flowering branch, natural size. 
Vertical section of a flower, enlarged. 
. A fruiting branch, natural size. 
. Vertical section of a fruit, enlarged. 
. A nutlet, front view, enlarged. 
Oo Pp wr 
- The end of a vigorous shoot, natural size. 
