REFERENCES 



Under this heading it is proposed to include, by author, title, and citation, references to scien- 

 tific papers published in or emanating from Washington. It is requested that authors cooperate 

 with the editors by submitting titles promptly, following the style used below. These references 

 are not intended to replace the more extended abstracts published elsewhere in this Journal. 



PALEONTOLOGY 



Berry, E. W. The flora oj the Catahoula sandstone. U. S. Geol. Surv. Prof. 

 Paper 98M: 227-251, pis. 55-60. August 23, 1916. 



Berry, E. W. The flora oj the Citronella formation. U. S. Geol. Surv. Prof. 

 Paper 98L: 193-208, pis. 45-47. September 11, 1916. 



Knowlton, F. H. A lower Jurassic flora from the upper Matanuska Valley, 

 Alaska. Proc. U. S. Nat. Mus., 51: 451-460, pis. 79-82. December 16, 1916. 



Knowlton, F. H. A new fossil Selaginella from the lower Tertiary of Montana. 

 Torreya, 16: 201-204, pi. 1. September 14, 1916. 



Knowlton, F. H. A review of the fossil plants in the United States National 

 Museum from the Florissant Lake beds at Florissant, Colorado, with descrip- 

 tions of new species and list of type-specimens. Proc. U. S. Nat. Mus., 61: 

 241-297, pis. 12-27. November 24, 1916. 



Wherry, E. T. Two new fossil plants from the Triassic of Pennsylvania. Proc. 

 U. S. Nat. Mus., 51: 327-329, pis. 29-30. November 24, 1916. 



BOTANY 



Bartlett, H. H. The botanical work oj Edward Lee Greene. Torreya, 16: 



151-175, with portrait. July, 1916. 

 Bartlett, H. H. Parthenium Lloydii, a new Mexican guayule. Torreya, 16: 



45, 46. February 26, 1916. 

 Briggs, L. J., Jensen, C. A., and McLane, J. W. Mottle-leaf of Citrus trees in 



relation to soil conditions. Journ. Agr. Research, 6: 721-740, pis. H, 96, 97, 



figs. 1-4. August 7, 1916. 

 Carrier, L. The identification of grasses by their vegetative characters. U. S. 



Dept. Agr. Bull. 461: 1-30, figs. 1-60. January 19, 1917. 

 Chase, A. The structure oj the spikelet of Aphanelylrum. Bot. Gaz., 61: 340-343, 



fig. 1. April 18, 1916. 

 Christensen, C. Maxonia, a new genus of tropical American ferns. Smith- 

 sonian Misc. Coll., 66: 1-4. September 30, 1916. 

 Cook, O. F. Branching and flowering habits of cacao and patashte. Contr. U. S. 



Nat. Herb., 17: 609-625, pis. 44-54. June 28, 1916. 

 Cook, O. F., and Cook, A. C. Polar bear cacti. Journ. Heredity, 8: 113-120, 



figs. 3-8. February 27, 1917. 

 Cook, O. F., and Doyle, C. B. Germinating coconuts. Journ. Heredity, 7: 



148-157, figs. 1-6. April, 1916. 



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