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1898 ] BRIEFER ARTICLES 59 
like those of B. ¢ripartitus. On this account the specimens from the 
United States heretofore seen by me cannot possibly be identified with 
Miihlenberg’s type in the Willdenow herbarium, but belong to another 
good species. 
It would be of great phytogeographic interest if the botanists of 
the United States would observe, now in their herbaria and next sea- 
son in ‘the field, whether 2B. connatus really occurs there with warty 
four-awned fruits, as in Europe, or whether this plant is there found 
only with smooth two to three-awned fruits. Perhaps there can be found 
in some of the older herbaria Miihlenberg’s types, which might show 
whether the fruits are smooth or warty, two- or four-awned. In any 
case I should be greatly obliged for information on this point.— C. 
WarnstorF, Weuruppin, Germany. 
AERIAL TUBERS OF SOLANUM TUBEROSUM. 
Ix December 1895, some interesting specimens of aerial tubers 
were found on Solanum tuberosum in the garden of the steward of the 
Louisiana State University and Agricultural and Mechanical College, 
at Baton Rouge. My attention was called to them by Mr. Holmes, 
