388 INDEX TO AMERICAN BOTANICAL LITERATURE 
Wolkoff, M. I. Effect of ammonium sulfate in nutrient solution on 
the growth of soybeans in sand cultures. New Jersey Agr. Exp. 
Sta. Ann. Report 38: 416-419. 1917. 
Woodcock, E. F. Structure of mature seed of Eriogonum microthecum. 
Michigan Acad. Sci. Ann. Rep. 20: 233-236. pl. 13. 22 N 1918. 
Woodward, R. W. Two Festuca varieties. Rhodora 21: 72. 14 Ap 
1919. 
Yates, H. S. Some recently collected ee fungi—II. Philip. 
hea Sci. 13: (Bot.) 361-385. N11 
rty-one new species in various genera are a 
en H.W. Ballota hirsuta, a recent adulterant for Marrubium 
vulgare. Am. Jour. Pharmacy g1: 147-156. f. r-9. Mr 1919. 
Zavitz, C. A., & Squirrell, W. J. Hay and pasture crops, grasses, 
clovers, etc. Ontario Dept. Agr. Bull. 269: 1-55. F 1919. 
[Illust.] 
Zeller, S. M., & Dodge,C.W. Arcangeliella, Gymnomyces,and Maco- 
ieee in North America. Ann. Missouri Bot. Gard. 6: 49-59. 
f. 1-3. F 1919, 
‘tadities weniger caudata, Gymnomyces Gardneri and Macowanites echino- 
Sporus, spp. n 
