98 INDEX TO AMERICAN BOTANICAL LITERATURE 
Bastin, S. L. Giving plants medicine. Sci. Am. Mo. 3:62. Ja192!. 
Blakeslee, A. F. A dwarf mutation in Portulaca showing vegetative 
reversions. Genetics 5: 419-433.f. 1. Jl 1920. 
Brainerd, E., & Peitersen, A. K. Blackberries of New England— 
their classification. Vermont Agr. Exp. Sta. Bull. 217: 5-84. 
pl. 7-36. Je 1920: 
Includes 2 new hybrids. 
Britton, N. L. Investigation of the flora of northern South America. 
Science II. 53: 29, 30. 14 Ja 1921. 
Brooks, C., Cooley, C.S., & Fisher, D. F. Diseases of apples in storage. 
U.S. Dept. Agr. Farmers’ Bull. 1160: 3-24. f. 1-26. S 1920. 
Brush, W. D. Utilization of sycamore. U.S. Dept. Agr. Bull. 884: 
1-24. pl. 1-4 + f. 1-3. 12.0 1920. 
Burkholder, W. H. The effect of two soil temperatures on the yield 
and water relations of healthy and diseased bean plants. Ecology 
1: 95-112. f. r. Ap 3920. 
Burns, G. P. Eccentric growth and the formation of redwood in the 
: main stem of conifers. Vermont Agr. Exp. Sta. Bull. 219: 3-16. 
pl. 1-4+f. 1-10. Je 1920. ; 
Campbell, D.H. Some botanical and environmental aspects of Hawaii. 
Ecology 1: 257-269. O 1920. 
Cannon, W. A. Relation of the rate of root growth in seedlings of 
Prosopis velutina to the temperature of the soil. Carnegie Inst. 
Washington Year Book 16: 84. 1917. 
Cannon, W. A. Root-growth of Prosopis velutina and Opuntia verst- 
color under conditions of a small oxygen-supply in the soil. er 
Inst. Washington Year Book 16: 82, 83. 1917. 
Chamberlain, C. J. Grouping and mutation in Botrychium. Bot. 
Gaz. '70: 387-398. f. 1-1z. 24 N 1920. 
Chardon, C. E. A list of the pyrenomycetes of Porto Rico collected 
by H. H. Whetzel and E. W. Olive. Mycologia 12: 316-321. 
1920. ; 
Christensen, C., & Skottsberg, C. The Pteridophyta of the Juan 
Fernandez Islands. Nat. Hist. of Juan Fernandez and Easter 
Isl. 2: 1-46. pl. 1-5 + f. 1-7. 1920. 
‘Clute, W. N. Plant names and their meanings. Flower Grower 7: 
196-202. D 1920. 
Clute, W. N. The rarest American plant. Am. Bot. 26: 127-129. . 
N 1920. 
PEER remota (Greene) Fernald, of Illinois. 
