INDEX TO AMERICAN BOTANICAL LITERATURE 227 
Peck, M. E. The vegetation of Cape Blanco [Oregon]. Proc. 
Iowa Acad. Sci. 27: 85-89. 1920. 
Pennell, F. W. Some overlooked Scrophulariaceae of Rafines- 
que. Torreya 22: 77-84. O 1922 
Pfeiffer, N. E. Monograph of the Isoetaceae. Ann. Missouri 
Bot. Gard. 9: 79-232. pl. 12-19. Ap 1922. 
Includes 3 new American species. 
Poole, R. F. A new fruit rot of tomatoes. Bot. Gaz. 74: 
210-214. pl.7. 160 1922. 
Poponoe, W. Dr. Fenzi’s contributions to American horti- 
culture. Jour. Hered. 13: 215-220. 12 D 1922. [Illust.] 
Poponoe, W., & Pachano, A. The capulin cherry. Jour. 
Hered. 13: 51-62. 7S 1922. [Illust.] 
A cultivated form of Prunus serotina Ehth. 
Porterfield, W. M. References to the algae in the Chinese 
classics. Bull. Torrey Club 49: 297-300. tote, 34.0) 4929. 
Ramsey, G. B. Basisporium gallarum Moll., a parasite of the 
tomato. Bot, Gaz. 74: 325-328. f. 1-11. 23 N 1922. 
Rangel, E. Oswaldia icarahyensis (nota preliminar). Revista 
Sci. 4: 93, 94. f. 1-4. Je 1922. 
A new genus from Brazil. 
Rankin, W. H., & Hockey, J. F. Mosaic and leafcurl (yellows) 
of the cultivated red raspberry. Phytopathology 12: 253- 
264. 12 Au 1922. 
Rehder, A. New species, varieties and combinations from the 
herbarium and the collections of the Arnold Arboretum 
(cont.). . Jour. Arnold Arb. 3: 207-224. D 1922. 
Rehder, A. Two new Asiatic poplars. Jour. Arnold Arb. 3: 
225-227. D 1922. 
Reid, E.M. Age and area from a palaeobotanical standpoint. 
In Willis, J. C., Age and area 137-147. 1922. 
Richmond, I. J. A. N. Jones—plant breeder. Jour. Hered. 
13: 103-107. 30S 1922. 
