116 INDEX TO AMERICAN BOTANICAL LITERATURE 
Harter, L. L., & Weimer, J. L. Studies in the physiology of 
parasitism with special reference to the secretion of pectinase 
by Rhizopus Tritici. Jour. Agr. Research 21: 609-625. 
1 Au 1921 
Heim, A. Chiceernitniede der Halbinsel Niederkalifornien. 
Vegetationsbilder XIII. 3, 4: pl. 13-24 + descriptive text. 
1916. 
Hoerner, G. R. Germination of aeciospores, urediniospores 
and teliospores of Puccinia coronata. Bot. Gaz. 72: 173- 
15703 Th S 2041. 
Hohenkerk, L. S._ Botanical identifications of British Guiana 
trees and plants. Jour. Board Agr. British Guiana 11: 
98-106, 178-185. 1918. 
Hohenkerk, L. S. British Guiana timbers. Jour. Board Agr. 
British Guiana 12: 152-187. Jl 1919. 
Hollick, A. Loco weeds. Nat. Hist. 21: 85-91. F 1921. 
H[osseus], C. C. Dr. Federico Kurtz [1854-1920]. Bol. Acad. 
ac. Cienc. Cordoba (Argentina) 24: LIv-LIx. 1921. 
Howe, M. A. Some plants from tropical sea gardens. Nat. 
Hist. 20: 561-568. D 1920. 
Hutchinson, J. The family Winteraceae. Kew Bull. Misc. 
Inform. 1921: 185-191. 1921. [With map.] 
Hutchinson, J. The genus Peeks le Kew Bull. Misc. 
Inform. 1921: 201-205. f. 7. 
Illick, J. S. The hard pines of the ee Am. For. 27: 
487-496. Au 1921. 
Illick, J. S. The pines of the South. Am. For. 27: 551-559; 
574. S 1921. [Illust.] 
Johnston, J. R. El platano y sus enfermedades. Revista Agr. 
Com. y Trab. 1: 419-421. Au 1918. [Illust.] 
Jones, L. H., & Shive, J. W. Effect of ammonium sulphate 
upon plants in nutrient solutions supplied with ferric 
phosphate and ferrous sulphate as sources of iron. Jour. 
Agr. Research 21: 701-728. pl. 136+ f. 1-9. 15 Au 1921. 
Jones, S. R. Preliminary report on the flora and fauna of the 
eastern part of the Rosebud Reservation, now known as 
Gregory County [South Dakota]. South Dakota Geol. 
Surv. Bull. 4: 123-142. 1908. 
Jouvenaz, J. H. Cereus. Floralia 42: 371, 372. 17 Je 1921. 
[Illust.] 
