22 Bulletin 1, Biological Society of Washington, 1918. 



Miller, G. S., Jr. 

 The dogbanes of the District of Columbia. 

 Proc. Biol. Soc. Wash., 13, pp. 79-90, PI. II, Sept. 28, 1899. 

 Synopsis of 7 species, 3 of them described as new. 



Greene, E. L. 

 Studies in the Compositae, 8. 

 Pittonia, 4, pp. 243-284, Jan. 26, 1901. 

 Describes 2 new species of Bidens from this region. 



Holm, Theodor. 



Fifth List of Additions to the Flora of Washington, D. C. 

 Proc. Biol. Soc. Wash., Vol. XIV, pp. 7-22, April 2, 1901. 

 41 additions. 



Steele, Edward S. 



Sixth List of Additions to the Flora of Washington, D. C.» and 

 Vicinity. 



Proc. Biol. Soc. Wash., Vol. XIV, pp. 47-86, June 19, 1901. 



With descriptions of new species and varieties by Edward L. 

 Greene, Alvah A. Eaton, and the Author. 



151 additions; many are new varieties only; original descriptions 

 of 3 forms. 



Greene, E. L. 

 New or noteworthy violets. 

 Pittonia, 5, pp. 87-106, Nov., 1902. 

 5 new species from the District flora. 



Miller, G. S., Jr. 



The species of Geum occurring near Washington. 



Proc. Biol. Soc. Wash., 17, p. 101, April 9, 1904. 



Four species recorded; correction of previous record of a fifth. 



Brainerd, Ezra. 

 Hybridism in the genus Viola — III. 

 Phodora, 8, pp. 49-61, Pis. 66-70, March, 1906. 

 Notes on 7 hybrids from the Washington region. 



Burgess, E. S. 



Species and Variations of Biotian Asters with discussion of vari- 

 ability in Aster. 



Mem. Torrey Botanical Club, 13, 1906, 419 pp., 108 figs. 



Records 24 species and 5 varieties from District of Columbia 

 Region, many of them new. 



