INDEX TO AMERICAN BOTANICAL LITERATURE 95 
Schlechter, R. Die Orchidaceen-Gattungen Altensteinia H. B. et 
Kth., Aa. Rchb. f. u. Myrosmodes, Rchb. f. Repert. Sp. Nov. rr: 
147-150. 200 1912. 
Schlechter, R. Orchidaceae novae et criticae. Decas XXXV. Re- 
pert. Sp. Nov. 11: 41-47. 1 Jl 1912. 
Includes seven new species from South America. 
Schreiner, O., & Skinner, J. J. Nitrogenous soil constituents and their 
bearing on soil fertility. U.S. Dept. Agr. Bureau Soils Bull. 87: 
3-84. pl. I-11 +f. r.. 17 D 1912. ; 
Setchell, W. A. Studies in Nicotiana, I. Univ. Calif. Pub. Bot. 5: 
I-86. pl. 1-28. 5 D 1912. 
Shafer, J. A. Botanical explorations in Santa Clara and Oriente. 
Jour. N. Y. Bot. Gard. 13: 169-172. N 1912. 
Sharp, L. W. The orchid embryo sac. Bot. Gaz. 54: 372-385. pl. 2I- 
23. 13 N 1912. 
Sherff, E. E. Range extensions of Rhamnus Frangula and Sporobolus 
asperifolius. Rhodora 14: 227. 9 D 1912. 
Shreve, F. Cold air drainage. Plant World 15: 110-115. My 1912. 
Skinner, J. J. Effect of solanine on the potato plant. Plant World 15: 
253-256, ft.) ae dea. 
Smith, E. Etiology of crown galls on sugar beet. Phytopathology 2: 
270-272. 1 1G: ; 
Spargo, M. The heat produced by leaves. Plant World 15: 277-293. 
D 1912. . 
Standley, P. C. Some useful native plants of New Mexico. 
sonian Rep. 1911: 447-462. pl. I-13. 1912. 
Stoland, O. O. The abortive spike of Botrychium. Bot. Gaz. 54: 
525-531. f. i-2z. 16 D 1912. : 
Stout, A. B. The individuality of the chromosomes and their serial 
arrangement in Carex aquatilis. Archiv Zellforsch. 9: 114-139. 
Smith- 
pl. 11, 12. 3 D 1912. 
Stuchlik, J. Zur Synonymik der Gattung Gomphrena. II. 
Sp. Nov. 18: 151-162. 20 O 1912. 
Includes Gomphrena Schinziana sp. nov. from South America. 
Thellung, A. Lepidii generis formae novae ex Museo botanico Bero- 
linensi. Repert Sp. Nov. 11: 309, 310. 25 N 1912. 
Includes 4 new varieties from Mexico and pegged “inmate gies 
thectneal W.P. The anatomy and relationships of the Gnetales. I. 
The genus Ephedra. Ann. Bot. 26: 1077-1104. pl. 94-97 +f. 1, 2. 
O 1912. 
Tracy, H. H. Roughing it to the Yosemite. Am. Fern. Jour. 2: 107- 
’ ee 
114. 18 D 1912. ie 
Repert. 
