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INDEX TO AMERICAN BOTANICAL LITERATURE 615 
Emerson, R. A. The unexpected occurrence of aleurone colors in F2 
of a cross between non-colored varieties of maize. Am. Nat. 46: 
612-615. O 1912. 
Essed, E. Cacao canker. West Ind. Bull. 12: 302-308. 1912. 
Fawcett, G. L. Report of the pathologist. Ann. Rep. Porto Rico 
Agr. Exp. Sta. 1911: 37-39. 3S 1912. 
Includes notes on plant diseases, soil biology, and royal palm root nodules. 
Fernald, M.L. The inland variety of Spiraea tomentosa. Rhodora 14: 
188-190. 30S 1912. 
Fernald, M.L. A purple-fruited ash. Rhodora 14: 192. 30S 1912. 
“Fraxinus americana L., forma iodocar pa, n. f., fructibus purpureis.”’ 
Fink, B. A college course in plant pathology. Phytopathology 2: 
150-152. Aw 1912, 
Fink, B., & Stover, W. G. Laboratory exercises in plant physiology 
and ecology. 1-30. Oxford. 1 Jl 1911. 
Fredholm, A. A possible inference to be drawn from studies of cacao 
canker. West Ind. Bull. 12: 308-310. 1912. 
Gain, L. Note sur la flore algologique d’eau douce de |’Antarctide 
Sud-Américaine. Bull. Mus. Hist. Nat. Paris 17: 371-376. 1911. 
Includes Nostoc — N. Borneti, Cosmarium antarcticum, and 
Trochiscia tuberculifera spp. nov. ; 
Gernert, W.B. Anew aibepeies of Zea Mays L. Am. Nat. 46: 616- 
622. O1912. [Illust.] 
Glaser, R. W., & Chapman, J. W. Studies on the wilt disease, or 
“flacheria’”’ of the gypsy moth. Science II. 36: 219-224. 16 Au 
1912 
Dikcase attributed to Gyrococcus flaccidifex gen. et sp. n 
Goodding, L. N. New southwestern ferns. Mablenbergie 8: 92-94. 
40> 1912: 
Includes descriptions of five new species. 
Graves, H. S. Broadleaf maple. Acer macrophyllum Pursh. U. 5. 
Forest Serv. Silv. Leaflet 51: 1. 17 S 1912. 
Graves, H. S. Red alder. Alnus oregona Nutt. U. S. Forest Serv. 
Silv. Leaflet 53: 1-4. 185 1912. 
Graves, H.S. Western hemlock. Tsuga heterophylla (Raf.) Sargent. 
U. S. Forest Serv. Silv. Leaflet 45: 1-6. 145 1912. 
Gydrffy, I. Molendoa tenuinervis Limpr. in America arctica. Bryolo- 
gist 15: 75-81. pl. 3. S 1912. 
Harding, H.A. The trend of investigation in plant pathology. Phyto- 
pathology 2: 161-163. Au 1912. 
Harper,R. A. The structure and development of the colony in Gontum. 
Trans. Am, Micro. Soc. 31: 65-83. pl. 5. Ap 1912. 
