280 Index to American botanical literature 



Houghton, E. M., & Hamilton, H. C. A pharmacological study of 



Cannabis americana {Cannabis saliva}. Am. Jour. Pharm. 80 : 16- 

 20. Ja 1908. 



House, H. D. Studies in the North American Convolvulaceae — IV. 

 The genus Exogonium. Bull. Torrey Club 35: 97-107. //. /, 2. 

 20 Ap 1908. 



Includes 5 new species from the West Indies and Mexico. 



House, H. D. The genus Rosenbergia. Muhlenbergia 4: 22-25. 

 14 Ap 1908. 



Includes R. Pringlei sp. no v. 



Howe, R. H,, & M. A. Common and conspicuous lichens of New 

 England. Part 5. 72-87. Boston. 1908. [Illust.] 



Humphrey, H. B. Studies in the physiology and morphology of some 

 California Hepaticae. Proc. Wash. Acad. Sci. 19: 1-50. //. 1,2. 

 18 Ja 1908. 



Hus, H. Fasciations of known causation. Am. Nat. 42 : 81-97- 

 [Ap] 1908. [Illust] 



Jackson, H. S, Sorosporium EUisii Winter, a composite species. Bull. 

 Torrey Club 35 : 147-149. 20 Ap 1908. 



Includes S. confusum sp. nov. 



Jeffrey, E. C. On the structure of the leaf in cretaceous pines. Ann. 

 Bot. 22: 207-220. pi. 13, 14. Ap 1908. 



Jennings, ()• E. A further occurrence of Wynnea americana in Penn- 

 sylvania. Ann. Carnegie Mus. 4: 226, 227. pi. 56. Ap 1908. 



Jennings, 0. E. An ecological classification of the vegetation of Cedar 

 Point. Ohio Nat. 8 : 291-340. /. 1-22. Ap 1908. 



Jordan, D. S. The law of geminate species. Am. Nat. 42 : 73~" 8 °- 

 [Ap] 1908. 



Knuth, R. Die Gattung Hypseocharis. Bot. Jahrb. 41: 170-174- 

 24 Mr 1908. 



Includes 4 new South American species. 



Labroy, 0. Les nouveaux mani^obas de Bahia et de Piauhy. Jour. 

 d'Agric. Trop. 8: 65-71. 31 Mr 1908. 



Laumonnier, E. Ipomopsis elegans. Rev. Hort. 80: 108, 109- J 

 Mr 1908. [Illust.] 



Lemmon, J. G. Notes by a pioneer botanist— I. Muhlenbergia 4 : J 7" 



21. 14 Ap 1908. 



Lorenz, A. Jungem 

 27 Mr 1908. 



Torreya 8: 55> 5 6 ' 



