203. 
204. 
205. 
206. 
207. 
208. 
209. 
210. 
PALS 
212: 
DAS 
214. 
PASS 
Elliot, J.C. 1953. Composition of upland second 
growth hardwood stands in the tension zone of 
Michigan as affected by soils and man. Ecol. 
Monographs 23: 271-288. 
Engelhardt, D.W. 1965. A comparative pollen 
study of two early Wisconsin bogs in Indiana. 
Proc. Ind. Acad. Sci. 69: 110-118. 
Esten, M. M. 1932. A statistical study of a beech- 
maple association at Turkey Run State Park, Parke 
County, Indiana. Butler Univ. Bot. Studies 2: 
183-201. 
Erickson, R. O., L.G. Brenner, and J. Wraight. 
1942. Dolomitic glades of east-central Missouri. 
Ann. Mo. Bot. Gard. 29: 89-101. 
Evans, F.C., and S.A. Cain. 1952. Preliminary 
studies on the vegetation of an old field com- 
munity in southeastern Michigan. Contrib. Lab. 
Vertebrate Biol., Univ. Mich. 51: 1-17. 
and E. Dahl. 1955. The vegeta- 
tional structure of an abandoned field in south- 
eastern Michigan and its relation to environmental 
factors. Ecology 36: 685-706. 
Evers, R. A. 1952. Hill prairies in Illinois. Ph.D. 
Thesis. Univ. of Ill., Urbana. 
1955. The hill prairies of 
Illinois. Bull. Ill. Nat. Hist. Survey 26: 368-446. 
Ewing, J. 1924. Plant successions of the brush- 
prairie in northwestern Minnesota. J. Ecol. 12: 
238-267. 
Fassett, N.C. 1929. Preliminary reports on the 
flora of Wisconsin. Trans. Wis. Acad. Sci. 24: 
249-268. 
1944. Vegetation of the Brule 
Basin, past and present. Trans. Wis. Acad. Sci. 36: 
33-56. 
Fichter, E. 1954. An ecological study of inverte- 
brates of grassland deciduous scrub savanna in 
eastern Nebraska. Amer. Midl. Nat. 51: 321-439. 
Finley, R. W. 1951. The original vegetation cover 
216. 
DT 
218. 
219" 
220. 
221 
222. 
223% 
224. 
225: 
226. 
APE Tf 
of Wisconsin. Ph.D. Thesis. Univ. of Wis., Madison. 
and J. E. Potzger. 1952. Char- 
acteristics of the original vegetation in some prairie 
counties of Indiana. Butler Univ. Bot. Studies 10: 
114-118. 
Fitch, Henry S., and Ronald L. McGregor. 1956. 
The forest habitat of the University of Kansas 
Natural History Reservation. Univ. Kans. P. 10(3): 
79-127. 
Flaccus, Edward, and Lewis F. Ohman. 1964. 
Old-growth northern hardwood forests of north- 
eastern Minnesota. Ecology 45: 448-459, 
Flesland, James R., and Warren C. Whitman. 1964. 
A vegetational analysis of the salt-desert shrub 
type in western North Dakota. Proc. N. Dak. 
Acad. Sci. 18: 73-75. 
Florell, V. H. 1937. Native grasslands in the Huron 
(South Dakota) area. J. Amer. Soc. Agron. 29: 
403-411. 
Flory, E. L. 1936. Comparison of the environment 
and some physiological responses of prairie vegeta- 
tion and cultivated maize. Ecology 17: 67-103. 
Fosberg, M. A. 1949. Soil and site condition 
typical of the maple-basswood association in 
southern Wisconsin. M.S. Thesis. Univ. of Wis., 
Madison. 
Franks, James W., and Harold H. Hopkins. 1954. 
Upland depressions in a mixed prairie. Trans. 
Kans. Acad. Sci. 57: 48-54. 
Freckman, R. W. 1968. The prairie remnants of 
the Ames area. Proc. Iowa Acad. Sci. 73: 126-136. 
Fredricksen, M. T. 1938. Comparison of the en- 
vironment and certain physiological activities of 
alfalfa and prairie vegetation. Amer. Midl. Nat. 20: 
641-681. 
Fries, Magnus. 1962. Pollen profiles of late Pleisto- 
cene and recent sediments at Weber Lake, north- 
eastern Minnesota. Ecology 43: 295-308. 
Friesner, Ray C. 1937. Indiana as a critical botani- 
cal area. Proc. Ind. Acad. Sci. 46: 28-45. 
