116 INDEX TO AMERICAN BOTANICAL LITERATURE 
Cooper, W. S. The recent ecological history of Glacier Bay, 
Alaska: IT. Ecology 4: 223-246. f. z-z0o. 7 Au 1923. 
Councilman, W. T. The root system of Epigaea repens and its 
relation to the fungi of the humus. Proc. Nat. Acad. 
Sci. 9: 279-285. f. 7-4. 15 Au 1923. 
Curtis,O.F. The effect of ringing a stem on the upward transfer 
of nitrogen and ash constituents. Am. Jour. Bot. 10: 
361-382. f. 1-3. -28 Fi 1023. 
Davidson, A. New California plants. Bull. S. California Acad. 
sci. 22: 71-74. pl. 16-20. Jl. i923: 
Dodge, B. O. Systematic infections of Rubus with the orange- 
rusts. Jour. Agr. Research 25: 209-242. pl. 1-6 + f. 
I-97, 4° Aw 1923. 
Doolittle, S. P. & McKinney, H. H. Intracellular bodies in the 
phloem tissue of certain plants and their bearing on the 
mosaic problem. Phytopathology 13: ig cs pl. 15. 
28 Jl 1923. 
Edson, H. A. Acid production by Rhizopus Tritici in decaying 
sweet potatoes. Jour. Agr. Research 25: 9-12. 7 Jl 
1923. 
Eldridge, A. G. An insect trap in nature. Nat. Mag. 2: 45, 
46. Jl 1923. [Illust.] 
Pollination of Asclepias syriaca. 
Enomoto, N. Studies on an ever-segregating race in Portulaca 
grandiflora. Japanese Jour. Bot. 1: 137-151. Jl 1923. 
Ezekiel, W. N. Hydrogen-ion concentration and the develop- 
ment of Sclerotinia apothecia. Science II 58: 166. 31 
Au 1923. 
Fernald, M. L. Notes on the distribution of Najas in north- 
eastern America. Rhodora 25: 105-109. 7 Jl 1923. 
Fernald, M. L. Baffin Land plants collected by the Macmillan 
Expedition, 1922. Rhodora 25: 111-114. 7 Jl 1923. 
Fitzpatrick, H. M. Generic concepts in the Pythiaceae and 
Blastocladiaceae. Mycologia 15: 166-173. 20 Jl 1923. 
