46 INDEX TO AMERICAN: BOTANICAL LITERATURE 
Hedrick, U. P. Manual of American grape-growing. i-vili + 1-458. 
New York. I9g19. 
Hillmann, J. Beitrage zur Systematik der Flechten. Ann. Myc. 18: 
I-25. 1920. 
Hitchcock, A. S. Poaceae, in Standley, P. C., Trees and shrubs of 
Mexico. Contrib. U. S. Nat. Herb. 23: 65-70. 1920. 
Hohnel, F. Mykologische Fragmenti. Ann. ‘ee 18: 71-97. 1920. 
Includes Valseutypella gen. nov., from North Ameri 
Holbert, J. R., & Hoffer, G. N. Control of the root, stalk and ear rot 
diseases of corn. U.S. Dept. Agr. Farmers’ Bull. 1176: 3-24. f. 
I-25. 5S 1920. 
Hubert, E. E. Observations on Cytospora chrysosperma in the north- 
west. Phytopathology 10: 442-447. 25 O 1920. 
Hutchinson, J. Jeffersonia and Plagiorhegma. Kew Bull. Misc. 
Inform. 1920: 242-245. 1920. 
Johnson, F. R. Forests in the sand hills. Am. For. 26: 582-584. 
O 1920. 
Jones, D. F. Sterility in Shunde and plants. Sci. Am. Mo. 2: 117- 
119. O 1920. 
Judd,C.S. The first foe tree in Hawaii. Am. For. 26: 605, 606. 
O 1920. 
Kilmer, F. B., & Smith, R. O. Belladonna cultivation in a practical 
way. Am. Jour. Pharm. 92: 620-630. S 1920. [Illust.] . 
Kirby, R.S., & Thomas, H. E. The take-all disease of wheat in New 
York State. Science II. 52: 368-369. 15 O 1920. 
Knuth, R. Dioscoreaceae americanae novae. Notizbl. Bot. Gart. re 
Mus. Berlin-Dahlem 7: 185-222. 28 D 1917. 
New species in Dioscorea (92) and Rajania (11). 
Knuth, R. Oxalidaceae americanae novae. Notizbl. Bot. Gart. und © 
Mus. Berlin-Dahlem 7: 289-318. 15 My 1919. 
New American species in Oxalis (77) and Biophytum (4). 
Kriinzlin, F. Zwei neue und eine kritische Orchidacee. Notizbl. 
Bot. Gart. und Mus. Berlin-Dahlem 7: 319-322. 15 My 1919. 
Dikylikostigma, gen. nov., from Venezuela and Vanilla Preussii, sp. nov., from 
mala. 
Kranzlin, F. Cyriochilum H. B. K. Notizbl. Bot. Gart. und Mus. 
Berlin-Dahlem 7: 81-101. 15 My 1917. 
Includes 3 new South American and many new combinations. 
Krausel, RY Einige Bemerkungen zur Bestimmung fossiler Koniferen- 
Hélzer. Osterr. Bot. Zeitschr. 67: 127-135. 1918. 
