398 INDEX TO AMERICAN BOTANICAL LITERATURE 
Pulling, H. E. Biophysics as a point of view in plant physiology. 
Am. Jour. Bot. 9: 37-46. 21 F 1922. 
Ramsey, F. T. The Swazey barberry. Jour. Hered. 20: 426, 
497. °f. o4...N 1921. 
Berberis Swazeyt 
Rayner, M. C. Nitrogen fixation in Ericaceae. Bot. Gaz. 73: 
226-235. f. I-4. 1922. 
Record, S. J. Boxwoods of commerce. Bull Torrey Club 47: 
297-300, f.. I... 31 D.1922. 
Record, S. J. Notes on woods. Science II. 55: 267-269; 10 
Mr 1922. 
Rehder, A. New species, varieties, and combinations from the 
herbarium and the collections of the Arnold Arboretum. 
Jour. Arnold Arbor. 3: 11-51. Jl 1921. 
Includes 1 sp. nov. in Prunus. 
Reiche, C. Rasgos biologicos del abrojo. Mem. y Rev. Soc. 
Cien. 40: 41-44. pl. zr. O 1921. 
Opuntia tunicata. 
Renacco, R. Sobre algunas enfermedades parasitarias de las 
plantas cultivadas. Anal. Soc. Cien. Argentina 81: 62-70. 
Ja—F 1916. 
Round, E. M. A modern plant fossil. Bull. Torrey Club 49: 
Os, O4. 7. t. t2 Ap 1922. 
Sargent, C. S. Notes on North American trees—IX. Jour. 
Arnold Arbor. 3: 1-11. Jl 1921. 
Includes 11 spp. nov. in Crataegus. 
Sears, P. B. Variations in cytology and gross morphology of 
Taraxacum. Bot. Gaz. 73: 308-325. pl. 9, 10. Ap 1922. 
Sears, P. B. Variation in cytology and gross morphology of 
Taraxacum. Il. Senescence, rejuvenescence,; and leaf var-. 
iation in Taraxacum. Bot. Gaz. 73: 425-446. f. 1-0. 
Je 1922. é 
Seaver, F. J. Phyllostictales. oo (pars). North 
American Flora 6: 1-84. 5 Ap 19: 
