INDEX TO AMERICAN BOTANICAL LITERATURE 429 
Knight, L.I. Physiological aspects of self-sterility of the apple. Proc. 
Am. Soc. Hort. Sci. 1917: 101-105. Mr 1918. 
Knowlton, C. H. Plants from South Weymouth, Massachusetts. 
Rhodora 20: 115. 11 Je 1918. 
La Rue, C. L., & Bartlett, H. H. “An analysis of the changes involved 
in a case of progressive mutation. Genetics 3: 207-224: f. TI: 
My 1918. 
Loeb, J. Healthy and sick specimens of Bryophyllum calycinum. 
Bot. Gaz. 66:69. 15 Jl 1918. 
Lumsden, D. Orchid breeding. Jour. Internat. Gard. Club 2: 203- 
213. Je 1918. [I[llust.] 
Lyman,G.R. The relation of phytopathologists to plant disease survey 
work, Phytopathology 8: 219-228. 11 My 1918. 
MacCaughey, V. The Hawaiian kamani. Hawaiian Forest. & Agr. 
15: 69-73. Mr 1918. 
MacCaughey, V. The paradise tree. Hawaiian Forest. & Agr. 15: 
20-22. Ja 1918 
MacCaughey, V. A rare fruit tree of Hawaii. Hawaiian Forest. & 
Agr. 14: 97-98. Ap 1917. 
Diospyros ebenaster. 
MacDougal, D. T. Effect of bog and swamp waters on swelling in 
plants and in biocolloids. Plant World 21: 88-99. f. zr. Ap 1918. 
MacMillan, H. G. Sunscald of beans. Jour. Agr. Research 13: 647- 
650. pl. 64-66. 17 Je 1918. 
Martin, G. W. Brown blotch of the Kieffer pear. Phytopathology 8: 
234-238. f. r-9. 11 My 1918. 
McClintock, J. A., & Smith, L. B. True nature of spinach-blight and 
relation of insects to its transmission. Jour. Agr. Research 14: 1-60. 
pl. A, 1-11 +f..1. 1 Jl 1918. 
McCubbin, W. A. Public school survey for currant rust. Phytopa- 
thology 8: 294-297. 15 Jl 1918. 
Mertill, E. D. New species of Bornean plants. Philip. Jour. Sci. 13: 
(Bot.) 67-122. Mr 1918. 
Sixty-one new species are described in various genera. 
Miller, E. C., & Coffman, W. B. Comparative transpiration of corn 
and the sorghums. Jour. Agr. Research 13: 579-604. #l. es 63 + 
F.d-13. - 30 Je 1918. 
Muncie, J. H. Experiments on the control of bean anthracnose and 
bean blight. New York Agr. Exp. Sta. Tech. Bull. 38: 1-50. pl. 
ergs. te 1G17- 
