1918] BRIEFER ARTICLES 273 
shows a remarkable difference between the two collections, and taken 
with the facts shown in the table leads the writer to identify the 1917 
collection as S. Weberi Keutz. 
Fic. 1.—a, Spirogyra Weberi; b, S. inflata 
These differences are shown in fig. 1, from preparations made at the 
Same magnification, in the same mounting media of identical con- 
centration.—Bert CunnincHAM, Trinity College, Durham, N.C 
AN ENDEMIC BEGONIA OF HAWAII 
The flora of the Hawaiian Archipelago exhibits many pronounced 
peculiarities. Among these the high endemism, nearly 85 per cent of the 
Spermatophytes, is noteworthy and unexcelled. One of the specific 
instances of endemism, very interesting to the student of plant distri- 
bution, is the solitary begonia, Hillebrandia sandwicensis Oliver. This 
lone species, sharply precinctive in its zonal range, is undoubtedly a 
vestige of an ancient flora more primitive than that which the islands now 
possess. Its presence in our flora constitutes one of the many evidences, 
floral, faunal, and geological, that at one time in the history of the 
