170 RYDBERG:SOLANUM IN MEXICO AND CENTRAL AMERICA 
The only specimen seen, which agrees with the original des- 
cription, is the following. 
San Luts: Potosi: | C..€. Parry Io. 
16. Solanum titachistotrichum. (Bitter) Rydberg sp. noy. 
S. Jamesii brachistotrichum Bitter, Repert. 11: 444. 
Bitter made this merely, a variety of S. Jamesti, evidently 
overlooking the fact that the leaf-segments are distinctly stalked, 
and the lateral ones decidedly oblique at the base. The general 
habit, leaf-form, and corolla, are practically the same as in S. 
lanciforme, but the calyx-lobes are lanceolate and fully as long,as 
the tube, and the leaves are decidedly puberulent. 
Cummuanua: Pringle 668; Wilkinson (in 1885). 
17. Solanum nayaritense (Bitter) Rydberg sp. nov. 
S. Jamesvi subsp. nayaritense Bitter, Repert. 12: 8. 1913. 
This is related to S, Jamesii, but distinguished from all re- 
lated forms by the corolla which is crisp-hairy without, and the 
leaves hirsute on both sides, It is, represented . by, the. type 
collected by Diguet, in Sierra Nayarit and by the following 
specimen, which agrees fully with the original description. 
TeEpPic: Rose 2134. 
18. SOLANUM James Torr. Ann. Lyc. N. Y. 2:.227. 1827. 
. Jamesit heterotrichum Bitter, Repert.. 11: 444. 1912. © © 
-Jamésti subsp: septentrionale Bitter, Repert. 12: 10. 1913. 
Jamesti subsp. septentrionale —_- Bitter, gone 12: 
I51. 
The first variety, enc by Bitter, represents one of the 
common forms of the typical S. Jamesii from Colorado. The 
subspecies septentrionale was proposed to cover all the ‘varieties 
of S. Jamesii from the United States and Northern Mexico. It 
included the typical form, the two varieties mentioned above 
and the variety. brachistotrichum,. which last one evidently is 
distinct... The variety ripicolum I have not seen, but from the 
description I judge that:it represents a form .of S. .Jamesit. 
S. Jamesii is mostly.confined to the United States, i, e. Colorado, 
New Mexico, southeastern Utah, and Arizona, but is also found 
in Chihuahua and perhaps in Sonora. 
Hann 
