396 INDEX TO AMERICAN BOTANICAL LITERATURE 
Murrill, W. A. Hygrophorus caprinus. Mycologia 14: 48, 49. 
6 Mr 1922. 
Murrill, W. A. Illustrations of fungi—X XXIII. Mycologia 
14: 25-29. pl. z—9. 6 Mr 1922. 
Oliveira, A. A. Métodos practicos para el cultivo de la yerba 
mate en el territorio de misiones. Bol. Minis. Agric. 26: 
395-402. O-D 1921. 
Overholts, L.O. Diagnoses of American porias.—I. Mycologia 
14; 1-11. pl. 1+f. 1-6. 6 Mr 1922. 
Palm, B. T. The false mildew of tobacco introduced into the 
United States from the Dutch East Indies. Phytopathology 
11: 430-432. 16 F 1922. 
Palmer, E. J. The forest flora of the Ozark region. Jour. 
. Arnold Arbor. 2: 216-232. Ja 1922. 
Parks, H. E. California hypogaeous Fungi—Tuberaceae. 
Mycologia 13: 301-314. 21 Ja 1922. 
Paton, J. B. Pollen and pollen enzymes. Am. Jour. Bot. 8: 
471-501. 15 F 1922. 
Payson, E. B. Monograph of the genus Lesquerella. Ann. 
Missouri Bot. Gard. 8: 103-236. f. 1-34. 9 Ja 1922. 
Pearson, W. H. Ricciocarpus natans (L.) Corda, from Africa. 
Bryologist 24: 69, 70. S 1921. 15 F 1922. 
Pessin, L. J. Epiphyllous plants of certain regions in Jamaica. 
Bull. Torrey Club 49: 1-14. pl. 1 + f.7. 21 Mr 1922. 
Peters, R. Moisture requirements of germinating seeds. 
Kansas Univ. Sci. Bull. 13: 23-37. f. 1, 2- My 1920. 
Petzke, E. La Fourcroya gigantea (una _ textil). Bol. 
Minis. Agric. 26: 403-407. O-D 1921 
Pfeiffer, H. Conspectus Cyperacearum in America meridionali 
nascentium. I. Genus Heleocharis. Herbarium 58: 85-88. 
1922. 
Piche, G. C. The forests of Quebec. Jour. For. 20: 25-43. Ja 
1922 
