340 INDEX TO AMERICAN BOTANICAL LITERATURE 
Roe, M. L. The development of the conceptacle in Fucus. Bot. Gaz. 
61: 231-246. pl. 14-17. 15 Mr 1916. 
Rose, J. N. Echeveria setosa. Addisonia 1: 11. pl. 6. 31: Mr 1916. 
Rose, J. N. Pachyphytum longifolium. Addisonia 1: 7, 8. pl. 4. 31 
Mr 1916, 
Rydberg, P. A. Phytogeographical ‘notes on the Rocky Mountain 
region—IV. Forests of the subalpine and montane zones. Bull. 
Torrey Club 42: 11-25. 29 Ja rors. 
Safford, W.E. The botanical identity of Lignum nephriticum. Science 
IT. 43: 432. 24 Mr 1016. 
Safford, W. E. Eysenhardtia polystachya, the source of the bed 
Lignum nephriticum mexicanum. Jour. Washington Acad. Sci. 5: 
503-517. f. 1, 2. 19 Au 1915. 
Safford, W. E. A remarkable new Eysenhardtia from the west coast 
of Mexico. Jour. Washington Acad. Sci. 6: 133, 134. f- I. 19 Mr 
1916. 
Eysenhardtia Olivana sp. nov. 
Scott,C.A. Trees for Kansas. Kansas Agr. Exp. Sta. Circ. 55: “ 
Ja 1916. [Illust.] 
Scott, W. M. Fighting orchard insects and diseases. Am. Fruit- 
Grower 2: 3-5. Mr 1916. [lIllust.] 
Seaver, F. J. The earth-inhabiting species of Ascobolus. Mycologia 
8: 93-97. pl. 184. 11 Ap 1916. 
Three new species are described. 
Shaw, W. R. Besseyosphaera, a new genus of the Volvocaceae. Bot. 
Gaz. 61: 253, 254. 15 Mr 1916. 
Shreve, F. The weight of physical factors in the study of plant dis- 
tribution. Plant World 19: 53-67. Mr 1916. 
Small, J. K. Exploration in southern Florida in 1915. Jour. N. ¥ 
Bot. Gard. 17: 37-45. pl. 166-168. Mr 1916. : 
Smith, C. O. Cottony rot of lemons in California. Calif. Agr. EXP: 
Sta. Bull. 265: 237-258. f. I-11. Ja 1916. 
Sclerotinia libertiana 
Smith, C. O. Preliminary studies on the resistance of Prunus t0 
artificial inoculation with Bacterium tumefaciens. Phytopathology 
6: 186-194. pl. 6. 4 Ap 1916 
Spaulding, P. The blister rust Pee of white pine. Am. Forestry 
22: 97, 98. f. A-D. F 1916. 
