North American Flora 



THIS work is designed to present descriptions of all plants growing, 

 independent of cultivation, in North America, here taken to include 

 Greenland, Central America, the Republic of Panama, and the 

 West Indies, except Trinidad, Tobago, and Curasao and other islands off 

 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. 



It is planned to issue parts as rapidly as they can be prepared, the 

 extent of the work making it possible to commence publication at any 

 number of points. The completed work will form a series of volumes 

 with the following sequence : 



Volume I. Mycetozoa, Schizophyta^ Diatomaceae. 



Volumes 2 to lo. Fungi. 



Volumes 11 to 13. Algae. 



Volumes 14 and 15. Bryophyta. 



Volume 16. Pteridophyta and Gyranospermae. 



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- 

 erick V. Coville of the United States Department of Agriculture, Pro- 

 fessor Edward L. Greene of the United States National Museum, Pro- 

 fessor Byron D. Halsted of Rutgers College and Professor William Tre- 

 lease of the Missouri Botanical Garden have consented to act as an advis- 

 ory committee. 



Each author will be wholly responsible for his own contributions, 

 being restricted only to the general style adopted for the work, which 



4 A ^ 



must vary somewhat in the treatment of diverse groups. 



pected 



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 22, Part i, including Podostemonaceae by George V. Nash 



Rydberg 



J 



