50 INDEX to AMERICAN BOTANICAL LITERATURE 
XXIII. Cla- 
Riddle, L. W. Preliminary lists of New England plants 
doniaceae. Rhodora 11: 215-219. 3 D 1909. 
Rock, J. F. A new Hawaiian Scaevo/a. Bull. Torrey Club 36: 645, 
646. 16N 1909. _ [Illust.] 
Rolfe, R. A. New orchids: decade 34. Kew Bull. Misc. Inf. 1909: 
364-368. N 1909. 
Includes new American species of Pleurothallis (2), Stanhopea, Mormodes, and 
Oncidium, 
Romell, L. Some fungi growing both on coniferous and deciduous 
trees. Mycologia 1: 265-267. 1 D 1909. 
Ruedemann, R. Some marine algae from the Trenton limestone of 
New York. N. Y. State Mus. Bull. 133: 194-216. AZ. 7-37. 1909. 
Rydberg, P. A. The flowers and fruit of the turtle grass. Jour. N. 
Y. Bot. Gard. 10: 261-264. f/. 73. N 19009. 
Sargent, C.S. American Cra/aegi in the Species Plantarum of Lin- 
naeus. Rhodora 11: 181-183. 3N rgog. 
Sauer,L. W. Quercus Leana; a hybridoak. Plant World 12: 198- 
201.77, 2, 3 t900. 
Schaffner, J. H. An interesting Botrychium habitat. Ohio Nat. 10: 
8,9. N 1909. 
Schaffner, J. H. The gymnosperms of Ohio. Ohio Nat. 10: g-12. 
N 1909. 
Schneider, R. C. New combinations in Araliaceae. Bull. Torrey 
Club 36: 643, 644. 16 N 1go9. 
Schwappach, A. F. Neuere Erfahrungen iiber das Verhalten von 
Pseudotsuga Douglasii und Picea sitkaensis. Mitt. Deuts. Dendr. 
Gesells. 1909: 95-103. 1909. __[Illust. ] 
Schwerin, F. v. Monographie der Gattung Samébucus. Mitt. Deuts. 
Dendr. Gesells. 1909: 1-56. 1909. [{llust. ] 
Seaver, F. J.. Some plant diseases: their cause and treatment. Jour. 
N. Y. Bot. Gard. 10: 241-256. 7. 33-377. N 1909. 
Servettaz, C. Monographie des Eléagnacées. Deuxiéme _ partie. 
Anatomie et biologie. Beih. Bot. Centralb. 25°: 129-420. f/. 7-140. 
9 O 1909. 
Sherard, S. H. Kapok ( Eriodendron anfractuosum). Philippine Agr. 
Rev. 2: 440-443. f/. 7-37. Au 1909. 
* Shull,C. A. Oxygen pressure and the germination of Xanthium seeds. 
A preliminary report. Bot. Gaz. 48: 387-390. 15 N 1909. 
