INDEX TO AMERICAN BOTANICAL LITERATURE 187 
Hastings, G. T. The forest flora of Grassy Sprain Ridge [New 
York). Torreya 21: 73-76. O 1921. 
Hastings, G. T. The boy scouts and conservation of wild 
flowers. Torreya 21: 83, 84. O 1921 
Hauman, L. Deux graminées géantes de la flore argentine. 
Physis 5: 52-56. 31 O 1921. 
Includes Sporobolus maximus, sp. nov. 
Hauman, L., & Parodi, L. R. Los parasitos vegetales de las 
plantas cultivadas en la Republica Argentina. Revista 
Facult. Agron. y Veter. 3: 227-274. f. 1-4. D 1921. 
Hawkins, L. A. A physiological study of grapefruit ripening 
and storage. Jour. Agr. Research 22: 263-279. f. 1. 29 O 
1921. 
Heald, F.D. The relation of spore load to the per cent of stink- 
ing smut appearing in the crop. Phytopathology 11: 269- 
278. 15 N 1921. 
Heller, H. H. Phylogenetic position of the bacteria. Bot. 
Gaz. 32: 390-396. 15 D Ig21 
Heller, H. H. Suggestions prere a rational basis for the 
classification of the anaerobic bacteria. Jour. Bact. 6: 
521-553. °‘N 1921: 
Studies in pathogenic anaerobes IV. 
Hoerner, G. R. Miscellaneous studies on the crown rust of 
oats. Am. Jour. Bot. 8: 452-457. pl. 24. 19 D Ig2t. 
Holm, T. Morphological study oi Carya alba and Juglans 
nigra. Bot. Gaz. 32: 375—380. D/. 75, 70 + Ff. i. 15 -D 
1921. 
Holm, T. Recent botanical publications from the United 
States National Museum. Am. Midl. Nat. 7: 165-180. 
N 1921. 
Considerable original matter contained in a review. 
Hopkins, E. F. Studies on the Cercospora leaf spot of bur 
clover. Phytopathology 11: 311-318. pl. 3, 14 + f. 8, 9. 
9 D 1921. 
Howard, G. E. Extraction and separation of the pigments of 
Nereocystis Luetkeana. Publ. Puget Sound Biol. Sta. 
79-91. pl. 14. 1 O 1921. 
