186 INDEX TO AMERICAN BOTANICAL LITERATURE 
Griffee, F. Comparative vigor of F; wheat crosses and their 
parents. Jour. Azr. Research 22: 53-63. 8 O 1921. 
Grimes, E. J. A new station for Pogonia affinis. Rhodora 
23: 195-197. 15 D 1921. 
Guppy, H.B. America’s contribution to the story of the plant- 
world. Jour. Ecol. 9: go-94. S Ig2!. 
Harlan, H. V., & Pope, M.N. Ash content of the awn, rachis, 
palea, and kernel of barley during growth and maturation. 
Jour. Agr. Research 22: 433-449. f.-15. 19 N 1921. 
Harms, H. Drei neue Leguminosen aus Venezuela. Notizbl. 
Bot. Gart Berlin-Dahlem 8: 51, 52. 1S 1921. 
Species of Calliandra (1), Pithecolobium (1), and Piptadenia (1). 
Harms, H. Kakteen als Uric kee Monatschr. Kakteenk. 
31: 184-186. D 19 
Harms, H. Kakteen und Sigillarien. Monatschr. Kakteenk. 
31: 145-148. O I921. 
Harper, R. M. Cape Cod vegetation. Torreya 21: 91-098. 
D 1921. [Illust.] 
Harrington, G. T. Optimum temperatures for flower seed ger- . 
mination. Bot. Gaz. 72: 337-358. f. 1-10. 15. D Ig2l. 
ete J. A., Sinnott, E. W., Pennypacker, J. Y., & Durham, 
The vascular anatomy of hemitrimerous seedlings of 
este vulgaris. Am. Jour. Bot. 8:375-381. 14 N 1921. 
Harris, J. A., Sinnott, E. W., Pennypacker, J. Y., & Durham, 
G. The interrelationship of the number of the two 
types of vascular bundles in the transition zone of the 
axis of Phaseolus vulgaris. Am. Jour. Bot. 8: 425-432. 
19 D 1921. 
Harshberger, J. W. The artistic anatomy of trees. Nat. Hist. 
21: 387-397.. O 1921: [Blust.] 
Harter, L. L., & Weimer, J. L. A comparison of the pectinase 
produced by different species of Rhizopus. Jour. Agr. Re- 
search 22: 371-377. f:4, 2. 12 W 192r. 
Harter, L. L., Weimer, J. L., & Lauritzen, J. I. The decay of 
sweet potatoes (Ipomoea batatas) produced by different 
species of Rhizopus. Phytopathology 11: 279-284. 15 N 
1921. 
