210 INDEX TO AMERICAN BOTANICAL LITERATURE 
Dawe, M. T. Account of a journey through the western portion of 
Colombia, showing the possibilities of the economic development of 
the districts visited. Pp. 1-27. f. 1-18 + map. London. 1919. 
Contains many notes of plants seen. : 
Detjen, L. R. The Herald—new type of prune. Jour. Hered. 11 
253-258. J. Pi-rs.' § F vost, 
Detjen, L.R. Peloriain Viola primulaefolia Linn. Torreya 20: 107- 
£16: f-:2-10.; 5 F192. 
Diehl, W. W. The fungi of the W arr Expedition. Mycologia 13: 
< 36-45. 3. FE: 192. 
Contains list of 31 species, with localities. 
Earle, F.S. El mosaico de la cafia o matizado. FI estado actual de la 
epidermia. Puerto Rico Dept. Agric. y Trab. Circ. 22: 1-9. Ap 
1920. 
Earle, F. S. Seleccion de la semilla de cafia para siembra de gran 
cultura. Revista Agric. Puerto Rico 5°: 7-10. 30 D 1620. 
Edson, H. A. Vascular discoloration of Irish potato tubers. Jour. 
Agr. Research 20: 277-294. 15 N 1920. 
Ellen, Sister M. The germination of the spores of Conocephalum 
conicum. Am. Jour. Bot. 7: 458-464. pl. 24,45. .112. Ja-102%: ; 
Farwell, O. A. Notes on the Michigan flora—II. Rep. Michigan 
Acad. Sci. 21: 345-371. Jl 1920. 
Contains new varieties, forms and combinations in many genera. 
Fenno, F. E. Plants of the Susquehanna Valley and adjacent hills of 
Tioga County [New York], II. Supplementary list. New York 
State Mus. Bull. 219, 220: 247-250. 1920. 
Fernald, M. L. Brainerd & Peitersen’s blackberries of New aire 
Rhodora 22: 185-191. 15 F 1921. 
Review, but containing much original matter. 
Fleming, C. E., & Peterson, N- F. The jarrow-leaved milkweed 
(Asclepias mexicana) and the broad- leaved, or showy milkweed 
(Asclepias speciosa). Univ. Nevada Agr. Exp. Sta. Bull. 99: 1-32. 
fede EP 1980, 
Plants poisonous to live stock in Nevada. 
Friesner, R. C. Periodicity of elongation and cell division. Ann. 
Rep. Michigan Acad. Sci. 21: 233, 234. Jl 1920. 
Prelimi note 
Gerry, E. American storax production: results of different methods of 
tapping red gum trees. Jour. For. 19: 15-24. f. 1-4. Ja 1921. 
Discusses supply from Liquidambar Styraciflua L 
