256 INDEX TO AMERICAN BOTANICAL LITERATURE 
[Presented at S.M.S. meeting, Washington, D. C., December 28, r911.] 
Rolfe, R. A. Stanhopea peruviana. Curt. Bot. Mag. IV. 8: pl. 8417. 
F 1912. 
Rosenstock, E. Filices costaricenses—II. Repert. Sp. Nov. 10: 274- 
280. 31 Ja 1912. 
Eleven new species described. 
Rugg, H. G. Random notes on Bermuda ferns. Am. Fern Jour. 2: 
16-18. 29 F 1912. 
Rydberg, P. A. List of plants collected on the Peary Arctic Expedition 
of 1905-1906 and 1908-1909 with a general description of the flora 
of northern Greenland and Ellesmere Land. Torreya If: 249-259. 
12 Ja 1912; 12: 1-11. 22 Ja 1912. 
Includes description of Conioselinum pumilum Rose sp. 
Schaffner, J. H. A revised taxonomy of the grasses. Ohio Nat. 12: 
490-493. Mr 1912. 
Schlechter, R. Die Polychondreae ( Neottiinae Pfitz.) und ihre system- 
atische Einteilung. Bot. Jahrb. 45: 375-410. 21 F 1911. 
Seaver, F. J. The genus Lamprospora, with descriptions of two new 
species. Mycologia 4: 45-48. pl. 57. Mr 1912. 
Lamprospora tuberculata and L. areolata spp. 
Seaver, F. J. Studies in pyrophilous fungi—IIL. The viability of the 
spores of Pyronema. Bull. Torrey Club 39: 63-67. pl. 4. 9 Mr 
1912. 
Selby, A. D. A brief handbook of the diseases of cultivated plants in 
Ohio. Bull. Ohio Agr. Exp. Sta. 214: 307-456 + i-vii. f- 1-106. 
Mr 1910. 
Serner, O. Besprechung der Bliiten einiger neuerer PhyllocactuS 
Hybriden. Monats. Kakteenk. 22: 24-26. 15 F 1912. 
Sherman, J. W. Morels in October in Massachusetts. Rhodora ™ 
53, 54: 5 ir i082. 
Shreve, E. B. A calorimetric method for the determination of leaf 
temperatures. Johns Hopkins Univ. Circ. 1912: 146-148. es et 
Shreve, F. Establishment behavior of the palo verde. Plant World 
14: 289-296. D tort. 
Parkinsonia microphylla. 
Shull, G. H. Hybridization methods in corn breeding. Prot ae 
Breed. Assoc. 6: 63-72. 1911. [Illust.] 
Sonneberg, W. Heredity and environment. Proc. Ag Breed. Asso 
6: 380-384. 1911. 
Smith, E. F. Woronin. Phytopathology 2: 1-4. pl. F 19s 
Sprague, T. A. The genus Nautilocalyx. Kew Bull. Mae Inf. 1912: 
85-90. 1912. 
