Macbride — Certain Borraginaceae 47 
Greene gives, particularly the character of the groove near the 
edge of the nutlet, are salient features of the type of C. affinis. 
C. confusa Rydb. Bull. Torr. Club xxxvi. 679 (1909) seems to be 
separable only by the use of superficial and arbitrary characters. 
The variation in leaf-breadth appears to be merely a condition and 
the same may be true of the slightly higher attachment of the 
nutlets. 
C. ramuLosissmMa A. Nels. Eryth. vii. 68 (1899). This species is 
near C. Torreyana (Gray) Greene, but the habit and pubescence 
are different, the nutlets are more slender, and the areola is open 
instead of closed. But C. flerwosa A. Nels. in Coulter & Nelson, N. 
Man. Rocky Mt. Bot. 416 (1909), is C. Torreyana (Gray) Greene, 
var. calycosa (Gray) Greene (C. calycosa (Gray) Rydb.). The 
variety is more common than the typical form with which it merges. 
C. incana Greene, Leaflets i. 79 (1904), is apparently a specimen of 
C. Torreyana which is more canescent than usual. 
C. microstacuys Greene. C. Clevelandi Greene, Pitt. i. 117 
(1887), is not to be distinguished. 
C. Hitman Nels. & Kenn. Proc. Biol. Soc. Wash. xix. 157 
(1906), has been referred to C. Watsoni (Gray) Greene by Dr. 
Rydberg, Bull. Torr. Club xl. 481 (1913). This is an error, which 
may have been prompted by the distribution from the Rocky 
Mountain Herbarium of specimens determined as C. Hillmanit, 
when they really belong to C. Watsoni. The former species is 
characterized by a large solitary nutlet and is nearest C. Suks- 
dorfii Greenm. C. Watsoni, on the other hand, matures four small 
nutlets and is related to C. Torreyana. Its stems and calyces are 
much more bristly than those of C. Hillmanii. Since these species 
have been confused it seems desirable to cite representative collec- 
tions. Specimens in the Gray Herbarium of C. Watsoni: Ipano: 
sandy slopes, New Plymouth, Canyon Co., May 21, 1910, Mac- 
bride, no. 81. Wyomine: Point of Rocks, June 15, 1898, Aven 
Nelson, no. 4736; Centennial Hills, July 16, 1895, Aven Nelson, 
no. 1684. Uran: Wasatch Mountains, July, 1869, Watson, no. 
858. Nevapa: Mount Grant, Mineral Co., July 2, 1913, Heller, no. 
10,905, and Goldfield, July 16, 1913, no. 10,970 in part. OREGON: 
clay banks, Malheur Butte, Malheur Co., May 12, 1896, Leiberg, 
no. 2041 in part. Specimens of C. Hillmanii. Ipano: Snake Plains, 
1893, Palmer, no. 72, Henderson, no. 2561 (no other data). CoLo- 
