INDEX TO AMERICAN BOTANICAL LITERATURE 195 
Graff, P. W. Unreported plants from Glacier National Park 
~ [Montana]. Bull. Torrey Club 49: 175-181. 8 Jl 1922. 
Gravelle, P. O. Nature study with the microscope. Nat. 
Hist. 22: 549-557. D 1922. [Illust.] 
Graves, E. W. A fern collecting trip in Cuba. Am. Fern 
Jour. 12: 45-53. 11 S 1922. 
Greider, A. Zur Frage des Anbaus von Faserpflanzen im 
Staate Sao Paulo [Brazil]. Tropenpflanzer 25: 70-72. Je 
1922. 
Greir, N. M. Preserving Indian Pipes a oe without 
discoloration. Rhodora 24: 225, 226. 4 D1 
Grimes, E. J. Some interesting plants of the Vine coastal 
plain. Rhodora 24: 148-152. pl. 138. 11S 1 
Hagstrém, J. O. Potamogetonaceae, in Urban, I., Plantae 
Haitienses novae vel rariores a cl. Er. L. Ekman 1917 
lectae. Arkiv Bot. 177: 12-14. f. r. 15 My 1922. 
Includes Potamogeton pulchelliformis, sp. nov. 
Hansen, A. A. Austrian field cress: a new weed in the United 
States. Torreya 22: 73-77. f. 7. O 1922. 
Roripa austriaca (Crantz) Spach. 
Hanson H. C. Prairie inclusions in the deciduous forest 
climax. Am. Jour. Bot. 9: 330-337. f. 1, 2. 12 Jl 1922. 
Harger, E. B., Graves, C. B., Eames, E. H., Bissell, C. H., & 
Weatherby, C. A. Additions to the flora of Connecticut. 
Series 2. Rhodora 24: 111-121. 28 Au 1922. 
Harlan, H. V., & Pope, M. N. The germination of barley seeds 
harvested at different stages of growth. Jour. Hered. 13: 
72-75. °F D> 19022. [Hinst:] 
Harms, H. Uber die von L. R. Gibbes aus Carolina beschrie- 
benen Kakteen. Monats. Kakteenk. 32: 123,124. Au 
1922. 
Harshberger, J. W. Ecologic and morphological study of the 
clovers (Trifolium). Proc. Am. Phil. Soc. 61: 136-150 
pl. 1-6. S 1922. 
