160 INDEX TO AMERICAN BOTANICAL LITERATURE 
Hunnewell, F. W. A new station for three local Appalachian 
plants. Rhodora 25: 168. 29S 1923. 
Hunt, N. R. Notes on the occurrence and growth of cankers of 
Endothia parasivica. Phytopathology 13: 366-371. 8S 
1923. 
Hurd, A.M. Acidity of corn and its relation to vegetative vigor. 
Jour. Agr. Research 25: 457-470. f. 1, 2. 15S 1923. 
Ives, S. A. Maturation and germination of seeds of Ilex opaca. 
Bot. Gaz. 76: 60-77. f. 1-5. 15 S 1923. 
Jones, L. R., Williamson, M. M., Wolf, F. A., & McCulloch, L. 
Bacterial leafspot of clover. Jour. Agr. Research 25: 471- 
490. pl. 1-6 + f. I-3.. 228 1923. 
Kempton, J.H. Heritable characters of maize XIV.—Branched 
ears. Jour. Hered. 14: 243-251. f.1-5. 501923. 
Kendall, M.L. Astudy of variation in Polypodium ae Eee 
Kaulf. Am. Fern Jour. 13: 75-87. pl. 3. 3 0 1923. 
Khazanoff, A. A new tumor of the apricot. Jour. Agr. Re- 
search 26: 45-60. pl. I-13. 13 O 1923. 
Caused by Monochaetia Rosenwaldia, sp. nov. 
Killip, E.P. New species of Urticaceae from Colombia. Jour. 
Washington Acad. Sci. 13: 354-360. 19S 1923 
Includes new species in Pilea (9), Boehmeria (2), and Phenax (1). 
Knowlton, C. H. & Deane, W. Reports on the flora of the 
Boston district—XLI. Rhodora 25: 185-187. 26 O 1923. 
Kostytschew, S. Die Photosynthese der Insektivoren. Ber. 
Deutsch. Bot. Gesellsch. 41: 277-280. 17 O 1923. 
Kurz, H. Hydrogen ion concentration in relation to ecological 
factors. Bot. Gaz. 76: 1-29. f. 1-14. 15S 1923. 
Lamb, M. A., Sister. Leaflets of Cycadaceae. Bot. Gaz. 76: 
185-202. pl. 15,16. 15 O 1923. 
Lloyd, F. E. Ultramicroscopically observable fluorescence. 
Science II 58: 229, 230. 21S 1923. 
Observed in Algae. 
