320 INDEX TO AMERICAN BOTANICAL LITERATURE 
Irmscher, E. Pflanzenverbreitung und Entwicklung der Kon- 
tinente. Mitteil. Inst. Allg. Bot. Hamburg 5: 17-235. 
1922. 
Iwanoff, L. A., & Thielmann, M. Uber den Einfluss des Lichtes 
verschiedener Wellenlange auf die Transpiration der 
Pflanzen. Flora 116: 296-311. 1923. 
Jennison, H. M. Potato blackleg—with special reference to the 
etiological agent. Ann. Missouri Bot. Gard. 10: 1-68. 
Ot 7; ai: F $23. 
Jones, F. R. Stem and rootrot of peas in the United States 
caused by species of Fusarium. Jour. Agr. Research 26: 
459-476. pl. i +f.1. 8 D 1923. 
Kauffman, C. H. The mycological flora of the higher Rockies 
of Colorado. Pap. Michigan Acad. Sci., Arts & Lett. 1: 
IOI-150. pl. 30-34. 923 
es new species in Helotium (3), Boletus (1), Cortinarius (7), Maras- 
mtus (2), Pholiota (1), and Tricholoma (1). 
Keller, R. Uber neue Arten der Gattung Hypericum. Bot. 
Jahrb. Syst., Pflanzengesch. u. Piet aenees- 58: 193-199. 
1923. 
Includes 8 new American species. 
King, C. J. Habits of the cotton rootrot fungus. Jour. Agr. 
Research 26: 405-418. pl. 1-7 + f. 1-4. 1 D 1923. 
Knowlton, C. H. Butomus umbellatus on the St. Lawrence 
iver. Rhodora 25: 220, 221. D 1923. 
Kofoid, C. A., Severin, H. H. P., & Swezy, O. Nelson’s spiral 
bodies in tomato mosaic. Phytopathology 13: 330, 331- 
28 Jl 1923. 
Krinzlin, F. Orchid Monandrae—Pseud diales 
Pflanzenreich IV 50: 1-66. f. 1-5 
923. 
Includes new American species in es: (3), Pachyphyllum (4), and 
Dichaea (13). 
Kuhlmann, J. G. Gramineas (1 fasc.). Comm. Linh. Telegr. 
Estrat. de Matto-Grosso ao Amazonas [Brazil] Annex. 5 
Bot. 11: 1-96. pl. 1-6. 3 Mr 1922. 
Includes Spheneria, gen. nov., and Ichnanthus Rondonii, sp. nov. 
