62 INDEX TO AMERICAN BOTANICAL LITERATURE 
Spegazzini, C. La verdenasquina nueva variedad de Caucho. An, 
Soc. Cien. Argentina 78: 71-73. Au I915. 
Sprague, T. A. Ceanothus rigidus. Kew Bull. Misc. Inf. 1915: 379- 
381. S 1915. [Illust.] 
Standley, P. C. Hepaticae of New Mexico. Bryologist 18: 81-83. 
N Ig15. 
Standley, P. C. A new species of Jresine from the United States. 
Proc. Biol. Soc. Washington 28: 171-173. 29 N 1915. 
Tresine rhizomatosa sp. nov. 3 
Stewart, A. The pistillate spikelet in Zea Mays. Science II. 42: 694. — 
12 N 1915. >: 
Stewart, V. B. Mildew on black currants. Phytopathology 5: 349. # 
N 1915. —@ 
Stewart, V. B. Notes on the fire blight disease. Phytopathology 5: a 
327-334. N 1915. 
Taubenhaus, J. J.. & Manns, T. F. The diseases of the sweet potato 
and their control. Delaware Agr. Exp. Sta. Bull. 109: 1-55. 4 
f.1-65. My 1915. as 
Theissen, F., & Sydow, H. Die Dothideales. Ann. Myc. 13: 149° _ 
430. pl. I-6. 31 Au 1915; 431-746. 300 1915. a 
Thériot, I. Sur quelques mousses recueillies au Chili par le Prof. 
Carlos E. Porter. Revist. Chilena Hist. Nat. 19: 30-37. pl. 7 + 2 
J. 5.» YES. 4 
Tuttle, M. L. Fern trips in Virginia. Am. Fern Jour. 5: 108-113-+ 
D 1915. | 
Ulbrich, E. Malvaceae novae vel criticae austro-americanae. Repert 
Sp. Nov. 13: 498-518. 30 Je 1915. 
Valleau, W. D. Varietal resistance of plums to brown-rot. Jour: 
Agr. Research §: 365-396. pl. 37-39. 20 N 10915. a 
Vaupel, F. Echinocactus Maassii Heese. Monats. Kakteenk. 25: 44: ; 
Je 1915. [fllust.] 
Vries, H. de. Oecnothera gigas nanella, a mendelian mutant. Bot- 
Gaz. 60: 337-345. 15 N 1915. , 
Williams, R. S. Mosses of the Philippine and Hawaiian Islands col- : 
lected by the late John B. Leiberg. Bull. Torrey Club 42: 571-577. 
13 N 1915. 
Includes descriptions of four new species. 
Winkler, C. H. The botany of Texas. Univ. Texas Bull. 18: 1-27- J 
_ 25 Mr 1915. : 
