62 INDEX TO AMERICAN BOTANICAL LITERATURE 
Knowlton, C. H., & Deane, W. Report on the flora of the Boston 
District—X XIV. Rhodora 18: 213-221. 2 O 1916;—XXV., 
Rhodora 18: 248-252. D 1916. 
Knowlton, F. H. A new fossil Selaginella from the lower Tertiary of 
Montana. Torreya 16: 201-204. pl. 1. 145 1916. 
Selaginella Collieri sp. nov. 
Kraus, E. J. Variation of internal structure of apple varieties. Oregon 
Agr. Exp. Sta. Hort. Bull. 135: 1-42. pl. 1-31 +f. 1. Je 1916. 
Kraus, E. J., & Ralston, G.S. The pollination of the pomaceous fruits 
—III. Gross vascular anatomy of the apple. Oregon Agr. Exp. 
Sta. Hort. Bull. 138: 1-12. pl. 1-8. My 1916. 
Lipman, C. B., Burgess, P. S., & Klein, M. A. Comparison of the 
nitrifying powers of some humid and some arid soils. Jour. Agr. 
Research 7: 47-82. 9 O 1916. 
Loeb, J. Antagonistic salt action as a diffusion phenomenon. Science 
Il. 44: 574-576. 200 10916. 
Macbride, J. F. The true _Mertensias of western North America. 
Contr. Gray Herb. II. 48: 1-20. Au 1916. 
Four new species are described. 
Macbride, J. F. Revision of the genus Oreocarya. Cotnr. Gray Herb. 
Il. 48: 20-38. Au 1916, 
Three new species are described. 
Macbride, J. F. Notes on certain Boraginaceae. Contr. Gray Herb. 
IT. 48: 39-58. Au 1916. 
Includes Amblynotopsis gen. nov. and eight new species in Luppula (2), Amblyno- 
topsis (1), Cryptantha (2), Amsinckia (1), Mertensia (1), and Lithospermum (1). 
MacCaughey, V. The seaweeds of Hawaii. Am. Jour. Bot. 3: 474- 
479. 200 1916. 
Mansfield, W. Histology of medicinal plants. i-xi + 1-305. pl. I- 
127 +f. 1-54. New York. 
McClelland, C.K. On the regularity of blooming in the cotton plant. 
Science II. 44: 578-581. f. 1, 2. 200 1916. 
Millspaugh, C. F. Contributions to North American Euphorbiaceae 
—VI. Field Mus. Nat. Hist. Publ. Bot. 2: 401-420. Ap 1916. 
Includes descriptions of fifteen new species in Chamaesyce (9), Acalypha (2), 
Croton (3), and Tragia (1). 
Millspaugh, C. F. Pedilanthus Smallii. Addisonia 1: 47, 48. pl. 24. 
30 S 1916. 
ugh, C. F. Vegetation of Alacran reef. Field Mus. Nat. Hist. 
Publ. Bot. 2: 321-431. Ap 1916. [Illust.] 
