BULLETIN 
TORREY BOTANICAL CLUB. 
Vol. 22. Lancaster, Pa, July 31, onic ‘ ‘idan ts v. 
Some new and rare Desmids of the United States.—II, 
By L. N. JoHNsON. 
(PLATES 232, 233.) 
Since the publication of the first paper of this series! I have 
examined a number of collections of desmid-bearing material 
from various parts of the country. The results of this examina- 
tion have been to extend very greatly the known range of many 
species, and to add more than a score to the number reported 
from the United States by previous writers. Many species are 
still undetermined and held for further study. Material is also 
being accumulated which will illustrate the great variability of 
many species, but this subject will be discussed at another time. 
The present paper is based on collections made in New Hamp- 
shire, Connecticut, New York, North Carolina, Florida, Louisiana, 
Michigan, Kansas and California. From some of these States 
Material representing several localities has been examined. I 
wish to acknowledge my indebtedness to the friends who have 
responded so kindly to my request for material, and to Prof. Nord- 
stedt, who has aided me greatly by his criticism and advice. 
I have thought it best to make one change in the manner of 
reporting additions to our flora. After every such species is given 
a number in parenthesis. This refers to a numbered specimen in 
my herbarium. Thus if any species is incorrectly determined it 
1 Bulletin of Torrey Botanical Club, 21: 285. Je. 1894. 
