North American Flora 
HIS work is designed to present descriptions of all plants growing 
independent of cultivation, in North America, here taken to include 
the north coast of Venezuela, whose flora is essentially South American. 
It will be published in parts at irregular intervals by the New York 
Botanical Garden through the aid of the income of the David Lydig Fund 
bequeathed by Charles P. Daly. 
Volume 1. Mycetozoa, Schizophyta, Diatomaceae. 
Volumes 2 to ro. i. 
Volumes 11 to 13. Algae. 
Volumes 14 and 15, 
Volume 16. Pteridophyta and Gymnospermae. 
Volumes 17 to 19. Monocotyledones. 
Volumes 20 to 30. Dicotyledones. 
The preparation of the work has been referred by the Scientific Direc- 
tors of the Garden to a committee consisting of Professors L, M. Under- 
wood and N. L. Britton. 
Professor George F. Atkinson of Cornell University, Professors Charles 
R. Barnes and John M. Coulter of the University of Chicago, Mr. Fred- 
_ Each author will be wholly responsible for his own contributions, 
being restricted only to the general style adopted for the work, which 
must vary somewhat in the treatment of diverse groups. . ‘ 
The subscription price is fixed at $1.50 for each part; it is expected 
that four or five parts will be required for each volume. A limited num- 
ber of separate parts will be sold at $2.00 each. Address, 
THE NEW York BOTANICAL GARDEN 
BRONX Park, New York City 
Volume 7, Part 1, Ustilaginales, including Ustilaginaceae and Tilleti- 
aceae, by G. P. Clinton, was issued O 4, 1906 
Vol. 7, Part 2, Coleosporiaceae, Uredinaceae and Aecidiaceae (pars), 
22, 1905. 
olume 22, Part 2, including Saxifragaceae and Si cevapenere by J: 
Rydberg, Cunoniaceae, Iteaceae and Hamamelidaceae 
y N. L. Britton, Pterostemonaceae by J. K. Small, Altingiaceae by Percy 
Wilson and Phyllonomaceae by H. H. Rusby, was issued Dec. 18, 1905+ 
