INDEX TO AMERICAN BOTANICAL LITERATURE 397 
Piper, C. V. The identification of Berberis Aquifolium and 
Berberis repens. Contrib. U. S. Nat. Herb. 20: 437-451. 
pl. 24. 1922 
Piper, C. V. An unusual type of “Ou get in ere 
cristatum. Jour. Hered. 20: 423. f. zo. Nt 
Pittier, H. New or noteworthy plants from Colombia and 
Central America—8. Contrib. U. S. Nat. Herb. 20: 453- 
490. pl. 27~30. 1922. 
Includes new species in Virola (1), Dialyanthera (1), Pithecollobium (10), 
Machaerium (9), Protium (2), Zanthoxylum (3), Eurya (1), Lucuma (2), 
Sideroxylon (1), Vitex (4), Calycophysum (2). 
Pittier, H. On the species of Dalbergia of Mexico and Central 
America. Jour. Washington Acad. Sci. 12:54-64. 4 F 1922. 
Includes 8 new species. 
Plitt, C. C. A preliminary report, with notes, on the lichens 
found near the Cinchona Botanical Station, Jamaica, 
British West Indies. Bryologist 24: 60-64. 9 Ja 1922; 24: 
70-74. TEE 1929. 
Poole, R. F. Some recent investigations on the control of 
Sclerotinia Libertiana on the green house on the muck 
forms of Bergen County, New Jersey. Phytopathology 
12: 16-20. f. 1-3. 10 Mr 1922. 
Popenoe, W. The Andes berry. Jour. Hered. 12: 387~393. 
frontispiece + f. 1-3. N 1921. 
Rubus glaucus. 
Popenoe, W. The frutilla or Chilean strawberry. Jour. Hered. 
12: 457-466. f. 13-17. D I9g21. 
Popenoe, W. The native home of the cherimoya. Jour. Hered. 
12: 331-336. 20 F 1922. [Illust.] 
Prince, G. H. Forestry administration in New Brunswick. 
Jour. For. 20: 54-61. Ja 1922 
Pritchard, F.  & & Porte, W.S. Effect of fertilizers and lime on 
control of tomato leaf spot (Septoria Lycopersici). Phyto- 
pathology 11: 433-441. f. 1-10. 25 F 1922, 
