INDEX TO AMERICAN BOTANICAL LITERATURE 541 
Detwiler, S.B. The hickories. Am. Forestry 22: 451-455. Au 1916. 
[Illust.] 
Detwiler, S. B. The white pine. Identification and characteristics. 
Am. Forest. 22: 387-391. Jl 1916.  [IIlust.] 
Dixon, H. N.  Mnium antiquorum Cardot and Dixon, an extinct moss. 
Bryologist 19: 51, 52. f. 1-5. 25 Jl 1916. 
Doryland, C. J.T. The influence of energy material upon the relation 
of soil microorganisms to soluble plant food. N. Dakota Agr. Exp. 
Sta. Bull. 116: 319-401. pl. 1, 2. My 1916. 
Durfee, T. Lichens of the Mt. Monadnock region, N. H.—No. 7. 
Bryologist 19: 65, 66. 25 JI 1916. 
Fernald, M. L. Some notes on Spartina. Rhodora 18: 177-180. 3 
Au 1916. 
Forbes, S.A. Thomas Jonathan Burrill. Univ. Illinois Alumni Quart- 
i: 1-9." 25 Jl 19%6. 
_Forsaith, C.C. A report on some allocthonous peat deposits of Florida. 
Bot. Gaz. 62: 32-52. f. 1. 15 Jl 1916. 
Frost, H. B. Mutation in Matthiola annua, a ‘‘ Mendelizing”’ species. 
' Am. Jour. Bot. 3: 377-383. f. 1-3. Au 1916. 
Gortner, R. A., Lawrence, J. V., & Harris, J. A. The extraction of sap 
from plant tissues by pressure. Biochem. Bull. 5: 139-142. pl. I. 
My 1916. 
Graff, P. W. The stamens of Erythronium americanum. Torreya 16: 
180-182. Au 1916. 
Grose, L. R. The alternate hosts of the white pine blister rust. Am. 
Forestry 22: 469-471. Au 1916. [Illust.] 
Haas, A.R. A simple and rapid method of studying respiration by the 
detection of exceedingly minute quantities of carbon dioxide. 
Science II. 44: 105-108. 21 Jl 1916. 
Harper, R. M. Baptisia perfoliata in Florida? Torreya 16: 183, 184. 
Au 1916, 
Harper, R. M. Botanical work of Dr. E. W. Hilgard. Bull. Torrey 
Club 43: 389-391. 12 Au 1916. 
Harrington, G. T. Agricultural value of impermeable seeds. Jour. 
Agr. Research 6: 761-796. pl. 106 +f. 1-6. 14 Au 1916. 
Harshberger, J. W. The origin and vegetation of salt marsh pools. 
Proc. Am. Philos. Soc. 55: 481-484. pl. 9-14. 10 Jl 1916. 
