570 



Index to Recent Literature 



Waugh, F. A. & McFarland, J. H. Photography in Botany and 

 in Horticulture. Bot. Gaz. 30 : 204-206. 15 S. 1900. 



Webber, H.J. Work of the United States Department of Agricul- 

 ture on Plant Hybridization. Jour. Roy. Hort. Soc. 24: 1-18. /. 

 1-8. 1900. 



Wiegand, K. M. Some Notes on Saxifraga and Primula. Bull. 



Torr. Club, 27 : 388-391. Jl. 1900. 



Wiegand, K. M. The Development of the Embryo-sac in some 



Monocotyledonous Plants. Bot. Gaz. 30 : 25-47. //. 6, 7. 19 Jl. 



1900. 



Williams, N. Subularia aquatic a. Meehan's Monthly, 10 : 67, 

 68. My. 1900. 



Williams, R. S. Two new Species of Grimmia from Montana. 

 Bull. Torr. Club, 27 : 316, 317.//. ip, 20. Je. 1900. 



Woods, A. F. Stigmonose: A Disease of Carnations and other 

 Pinks. Bull. U. S. Dept. Agric. (Div. Vegetable Physiology and 

 Pathology) 19 : 6-30.//. i-j.f. 1-5. 1900. 



