- 
§22 InDEx TO AMERICAN BOTANICAL LITERATURE 
Thomson, R. B. A modification of a Jung-Thoma sliding microtome for 
cutting wood. Bot. Gaz. 50: 148, 149. 18 Au 1910. {Illust.] 
Treichler, A. C. Prostrate juniper. Forest Leaves 12: 168. O 1910. 
{Illust.]. 
Trelease, W. Species in Agave. Proc. Am. Phil. Soc. 49: 232-237. pl. 
32, 33. Jl 1910. 
Vail, A. M., & Rydberg, P. A. Zygophyllaceae. N. Am. Flora 25: 103- 
116. 3 Je 1910. 
Vinal, W.G. A guide for laboratory and field studies in botany. 1-30. 
Huntington, W. Va. [Mr rgrol. 
Vries, H. de. A new principle in the mechanism of nuclear division. Sci- 
ence IT, 32: 182, 183. 5 Au I9gto. 
Walker, E.R. Conditions influencing the growth of Usnea longissima. 
Plant World 13: 173, 174. Jl 1910. 
Weatherby, C. A. American forms of Lycopodium complanatum. Proc. 
Am. Acad. Arts & Sci. 45: 412-415. [20] My toto. 
Weatherby, C. A. A preliminary synopsis of the genus Echeandia. Proc. 
Am. Acad. Arts & Sci. 45: 387-394. [20] My 1910. 
Weatherby, C.A. Mexican phanerogams.—Notes and new species. Proc. 
Am. Acad. Arts & Sci. 45: 422-428. [20] My 1910. 
White, J. Cruciferae of County Peel. Ontario Nat. Sci. Bull. 6: 65. 
1910. 
Wiegand, K. M. The relation of hairy and cutinized coverings to trans- 
piration. Bot. Gaz. 49: 430-444. f. z. 23 Je 1910. 
Williams, E. F. Notes on the flora of Franklin County, Massachusetts. 
Rhodora 12: 168-170. 15 Au 1910. 
Wilson, H. L. Gracilariophila, a new parasite on Gracilaria confervoides. 
Univ. California Publ. Bot. 4: 75-84. pl. 12, 13. 26 My 1910. 
Wolf, F. A. The prevalence of certain parasitic and saprophytic fungi in 
orchards as determined by plate cultures. Plant World 13: 164-172. 
f.r. Jl 1910; 190-202. f. 4,5. Au 1910. 
Wolf, F. A. Formation of adventitious roots by the hackberry tree. 
Plant World 13: 174, 175. Jl 1910. 
Wolf, F. A. The leaf blight of the American mistletoe, Phoradendron 
flavescens (Pursh) Nutt. Mycologia 2: 241-244. pl. 32. 23 S 1910. 
Macrophoma Phoradendri Wolf. 
