412 Wicut: ErRirricHum In NortH AMERICA 
tion of 12,000 feet, on a mountain northwest of Como, Colorado, 
by Crandall and Cowen (no. 36). 
E. argenteum hitherto identified as £. aretioides, differs from 
both the Alaskan plants with villous pubescence, which are its 
nearest relatives, in the following characters ; from £. Chamussonis 
in its smaller leaves and its usually somewhat elongated flowering 
branches, and from both Chamissonis and aretioides in its more 
silvery pubescence, its more villous calyx, its smaller flowers and 
the shorter teeth of the nutlets; it differs from other Rocky 
Mountain species in having nutlets with a toothed border, and has 
a more southern range, occurring on the high mountains of cen- 
tral Colorado and northeastern Utah. 
The specimens examined are as follows : 
CotoraDo: Rocky Mountains, Lat. 39°—41°, 1862, Hall & 
Harbour, 440. Near Boulder City, “alpine,” 1873, 7. NP at- 
terson, 26. Mountain northwest of Como, 12,000 ft. alt., 1895, 
Crandall & Cowen, 367. Gray's Peak, 12,000 ft. alt., June 19, 
1873 ; /. M. Coulter, 1872; 12-13,000 ft. alt., A. Gray, July 18, 
1892, C. S. Crandall. Saddle House, Pikes Peak, 12,500 ft. alt., 
1896, F. H. Knowlton, 16. Central Colorado, 13,000 ft. alt, 
1873, John Wolf. Without special locality or date, £. Palmer. 
Uran: Uinta Mountains, 12,000 ft. alt., 1869, Sereno Watson, 
849. : 
» 5. ERITRICHUM ARETIOIDES (Cham.) DC. 
Myosotis aretioides Cham. Linnaea, 4: 443. 1829. 
Eritrichum aretioides DC. Prodr. 10: 12 5. 1846. 
Eritrichum nanum aretioides Herder, Act. Hort. Petrop. ¥° 
535. 1871-1872. : 
Omphalodes nana aretioides Gray, Proc. Am. Acad. 20: 263- 
1885. 
A tufted or matted plant of numerous sterile branches with 
overlapping leaves and fewer elongated sparingly leafy ones bearing 
a compact flower cluster at the end, the sterile branches 3-5 &™ 
high, the flowering ones exceeding these from 2-5 or even BS. 
cm., the whole plant villous with a rather loose or spreading 
. pubescence ; leaves of the sterile branches 5-12 mm. long, 1-2.5 
_ mm. broad, oblanceolate or the upper ones sometimes nearly a 
linear, acute, or the lower ones rarely obtuse, those on the flower- 
ing branches linear or oblong-linear, obtuse or acute : calyx lobes 
