192 INDEX TO AMERICAN BOTANICAL LITERATURE 
Duff, G. H. Development of the Geoglossaceae. Bot. Gaz. 
74: 264-291. pl. 8-12. 23 N 1922. 
Dufrenoy, J. The occurrence of Cronartium ribicola in Europe. 
Phytopathology 12: 302-305. 12 Au 1922. 
Dupler, A. W. A bisporangiate sporophyll of Lycopodium lucid- 
ulum. Bot. Gaz. 74: 331, 332. f. 1. 23 N 1922 
Dupler, A. W. Early embryogeny of Reboulia hemts phaerica. 
Bot. Gaz. 74: 143-157. f. 1-47. 160 1922. 
Dupler, A.W. The male receptacle and antheridium of Reboulia 
hemisphaerica. Am. Jour. Bot. 9: 285-295. pl. 14 + f. 1-24. 
12 Jl 1922. 
Eaton, S. V. Sulfur content of soils and its relation to plant 
nutrition. Bot. Gaz. 74: 32-58. hehe 18-5 1029, 
Elliott, J. A., & Crawford, R. F. The spread of tomato wilt by 
infected seed. Phytopathology 12: 428-434. pl. 28 +f. 
I, 2. 170 1922. 
Elmore, C. J. A comparison of German and American diatoms. 
Proc. Nebraska Acad. Sci. 5: 65, 66. 192 
Emig, W. H. Mosses of the Rocky Mountains Park, Banff, 
Alberta, Canada. Bryologist 25: 61-66. 31 Jl 1922. 
Eriksson, J. The connection between Peridermium Strobi 
Kleb. and Cronartium ribicola Dietr..—is it obligate or 
not? Arkiv Bot. 182: I-40. f. 1-6. 8 Au 1922. 
Essig, F. M. The morphology, development, and economic 
aspects of Schizophyllum commune Fries. Univ. California 
Publ. Bot. 7: 447-498. pl. 51-61. 11 Au 1922. 
Evans, A. W. Recent studies on certain species of Riccia. 
Bryologist 25: 81-86. 7 N 1922. 
Evermann, B. W. The conservation and proper utilization of 
our natural resources. Sci. Mo. 15: 289-312. O 1922. 
Farr, C. H. The meiotic cytokinesis of Nelumbo. 
Bot. 9: 296-306. pl. 45 tft.” 12 Fl s9e>. 
Fawcett, H. S. A new Phomopsis of Citrus in California. 
Phytopathology 12: 419-424. f. 1,2. 17 O 1922. 
Am. Jour. 
