INDEX TO AMERICAN BOTANICAL LITERATURE 385 
Kitchin, P. C. The relation between the structures of some coniferous 
woods and their penetration by preservatives. Michigan Acad. 
Sci. Ann. Rep. 20: 203-220. pl. rz. 22 N 1918. 
Kotila, J. E. Frost injury of potato tubers. Michigan Acad. Sci. 
Ann. Rep. 20: 451-460. pl. 51, 52. 22 N 1918. 
Lee, H. A., & Merrill, E.D. The susceptibility of a non-rutaceous host 
to citrus canker. Science II. 49: 499, 500. 23 My 1919. 
Lyman, G. R. The advisory board of American plant pathologists. 
Phytopathology 9: 202-206. 23 My 19gI19. 
Macbride, J. F. Certain North American Umbelliferae. Contr. 
Gray Herb. 56: 28-35. 31 D 1918. 
Macbride, J. F. Further new or otherwise interesting Liliaceae. 
Contr. Gray Herb. 56: 1-20. 31 D 1918. 
Includes Dasylirion longistilum sp. nov. and several new names and new com- 
binations. 
Macbride, J. F. Reclassified or new Compositae, chiefly North Ameri- 
can Helenieae. ‘ Contr. Gray Herb. 56: 36-50. 31 D 1918. 
Includes Aster deserticola sp. nov. : 
Macbride, J. F. A revision of Mentzelia, section Trachyphytum. 
Contr. Gray Herb. 56: 24-28. 31 D 1919. 
Macbride, J.F. A revision of Mirabilis, subgenus Hesperonia. Contr. 
Gray Herb. 56: 20-24. 31 D 1918. 
Macbride, J. F. Various American spermatophytes, new or trans- 
ferred. Contr. Gray Herb. 56: 50-61. 31 D 1918. 
Guatteria boyacana, Duguetia vallicola, Machaerium Whit setae Cryptantha 
echinosepala, C. quentinensis, and Plantago Parishii, spp. nov., are des ribed. 
MacCaughey, V. The mangrove. Am. Bot. 25: 42-46. My 1919. 
MacDougal, D. T., Richards, H. M., & Spoehr, H. A. Basis of suc- 
culence in plants. Bot. Gaz. 67: 405-416. 19 May 1919. 
Makemson, W. K. The leaf mold of tomatoes, caused by Clado- 
sporium fuluum Cke. Michigan Acad. Sci. Ann. Rep. 20: 31I- 
348. pl. 23-37. . 22 N 1918 
Maxon, W. R. A new Cheilanthes from Mexico. Proc. Biol. Soc. 
Washington 32: 111, 112. 21 My 1919. 
Cheilanthes castanea. 
McCall, A. G., Norton, J. B. S., & Richards, P. E. Abnormal stem 
growth of soybeans in sand cultures with Shive’s three-salt solution. 
Soil Sci. 6: 479-484. pl. 1,2. D 1918. 
