220 INDEX TO AMERICAN BOTANICAL LITERATURE 
Howell, A. B. Agencies which govern the distribution of life. 
Am. Nat. 56: 428-438. O 1922. 
Hursh, C. R. The relation of temperature and hydrogen-ion 
concentration to uredinio-spore germination of biologic 
forms of stem rust of wheat. Phytopathology 12: 353- 
361, J. 1-7; 11 5 1922. 
Hyde, K. C. Anatomy of a gall on an trichocarpa. Bot. 
Gaz. 74: 186-196. pl. 6. 1601 
Hylander, C. J. A preliminary report on the desmids of Con- 
necticut (cont.). Rhodora 24: 213-224, 236-241. 1922. 
Ikeno, S. Studies on the genetics of flower-colors in Portulaca 
grandiflora. Jour. Coll. Agr. Tokyo 8: 93-133. pl. 2. 5 N 
1921. 
Illick, J. S. The beeches. Am. For. 28: 546-551. S 1922. 
[Illust.] 
Illick, J. S. Department of Forestry makes white pine survey 
of northeastern Pennsylvania. For. Leaves 18: 179-181. 
D 1922. 
Inman,O.L. Calamagrostis canadensis and some related species. 
-Rhodora 24: 142-144. 6S 1922 
Irwin, M. & Weinstein, M. Comparative studies on respiration 
—XXI. Acid formation and decreased production of CO, 
due to ethyl alcohol. Am. Jour. Bot. 9: 277-282. f. 1, 2. 
¥2 JF 2922. 
Iyengar, M. O. P., & Narasimhan, M. J. A new species of 
Schizonella, Phytopathology 12: 435-438. f. 1-4. 17 O 
1922. 
Schizonella colemani, sp. nov., from India. 
Jackson, B.D. Two catalogues. Jour. Bot. 60: 334, 335. N 
1922 
One is a catalogue of plants from P. Kalm. 
Janchen, E. Bemerkungen zu der Cistaceen-Gattung Cro- 
canthemum. Ocster. Bot. Zeitschr. 71: 266-270. D 1922. 
Includes C. stipulatum, sp. nov., from Texas, 
