INDEX TO AMERICAN BOTANICAL LITERATURE 311 
Weingart, W. Cereus geometrizans Mast. und Verwandte. 
Monatsschr. Kakteenk. 32: 17-20. F 1922; 35-38. Mr 
1922. 
Weingart, W. Cereus princeps Hort. Wiesb. Monatsschr. Kak- 
teenk. 32:20. F 1922.  [Illust.] 
From Guatemala. 
Weir, J. R. Cenangium piniphilum n. sp., an undescribed 
canker-forming fungus on Pinus ponderosa and P. contorta. 
Phytopathology 11: 294-296. pl. 13 + f.1, 2. 15 N 1921. 
Weston, W. H. A note relative to the reappearance of the 
sugar cane downy mildew in the Philippines. Phytopath- 
ology 11: 371-375. 27 Ja 1922. 
Wherry E. T. Soil reaction in relation to plant growth. Am. 
Jour. Pharm. 94: 110-114. 922. 
Reported by Dr. H. Leffmann, 
Wiggans, R. G. A classification of the cultivated varieties of 
barley. Cornell Univ. Agr. Exp. Sta. 46: 369-456. pl. 34- 
38. +f. t-72.. S 1921. 
Williams, F. N. Critical notes on some species of Cerastium. 
Jour. Bot. 59: 324-329. N 1921; 59: 349-353. D 1921. 
Includes C. glutinosum glabratum, var nov., from Colombia. 
Williams, R. S. Mosses from British Guiana and Dominica, 
Lesser Antilles, collected by Miss E. F. Noel in 1914. 
Bryologist 24: 65, 66. pl. 4. 15 F 1922. 
Macromitrium trinitense sp. nov. 
Willis, J.C. Endemic genera of pate in their relation to others. 
Ann. Bot. 35: 493-512. O 19 
Wilson, E. H. The cherries of Japan. Publ. Arnold Arb. 
7. 1916. 
Wilson, E.H. The conifers and taxads of Japan. Publ. Arnold 
Arb. 8. 1916. 
Wilson, E. H. Notes from Australasia. II. The — Zealand 
forests. Jour. Arnold Arbor. 2: 232-236. Ja 19 
Wilson, T. R. C. The effect of spiral grain on the strength of 
wood. Jour. For. 19: 740-747. f. 1-4. N 1921. 
