164 INDEX TO AMERICAN BOTANICAL LITERATURE 
Rigg, G. B. Snow injury to trees. Torreya 16: 257-260. 16 Ja 1917. 
Roberts, E. A. The epidermal cells of roots. Bot. Gaz. 62: 488-506. 
Robinson, B. L. The doctors John Brickell. Rhodora 18: 225-230. 
N 1916. 
Roe, N. L. A contribution to our knowledge of Splachnidium. Bot. 
Gaz. 62: 400-408. pl. 14-18. 16 N 1916. 
Rolfe, R. A. Huntleya citrina. Curt. Bot. Mag. IV. 12: pl. 8689. 
1916. 
A plant from Columbia. 
Rose, J. N. Sedum diversifolium. Addisonia 1: pl. 31 A. 30 D 
1916. 
Rose, J. N. Sedum humifusum. Addisonia 1: pl. 31 B. 30 D 1916. 
Rumbold, C. Pathological anatomy of the infected trunks of chestnut 
trees. Proc. Am. Philos. Soc. 55: 485-493. pl. 15-18. 1916. 
Rydberg, P. A. (Carduales) Carduaceae, Tageteae, Anthemideae. 
N. Am. Fl. 34: 181-288. 29 D 1916. 
Includes the new genera Chamariemisia, Vesicarpa, Hydropectis and Artemisi- 
as a species in Porophyllum (9), Pectis (10), Achillea (6), Crosso- 
stephium (1), oe pikes (29). 
Sanford, F. H. Michigan’s shifting sands. Their control and better 
utilization. Michigan Agr. Exp. Sta. Special Bull. 79: 1-31. f. 1-22. 
My 1916. 
Saunders, C. F. The Ossawatomie pine tree. Am. Bot. 22: 121, 122. 
N 1916. [Illust.]} 
Sax, K. Fertilization in Fritillaria pudica. Bull. Torrey Club 43: 
505-522. pl. 27-29+f. 1-3. 7 N 1916. 
Sell, R. A. Botanizing in the Corpus Christi region. Am. Bot. 22: 
91-94. Au 1916. 
Shively, A.F. Some of the plants mentioned in Shakespeare. Nature- 
Study Rev. 12: 374-383. D 1916. [Illust.] 
Shreve, F. Excursion impressions.. Trans. San Diego Soc. Nat. 
Hist. 2: 79-83. 1916.  [Illust.] 
Shufeldt, R. W. . Studying plants in winter. Am. Forest. 22: 731-737- 
f. 1-5. D 1916. 
Small, J. K. Royal Palm Hammock. Jour. N. Y. Bot. Gard. 17: 
165-172. pl. 179-182. 3 N 1916. 
Small, J.K. A cruise to the Cape Sable region of Florida. Jour. N. Y- 
Bot. Gard. 17: 189-202. pl. 183-188. 20N 1916. 
Smith, E. F. In memory of Thomas J. Burrill. Jour. Bact. 1: 269- 
271. My 1916. [Portrait.] 
