NATIVE WOODY PLANTS OF THE UNITED STATES 313 



(443) PALMER, E. J. 



1921. FOREST FLORA OF THE ozARK REGION. Arnold Arboretum Jour. 2 : 

 216-232. 



(444) ~ 



1927. ON NUTTALL'S TRAIL, THROUGH ARKANSAS. Jour. Arnold Arboretum 

 8: 24-55. 



(445) 



1929. THE LIGNEOUS FLORA OF THE DAVIS MOUNTAINS, TEXAS. Arnold Ar- 



boretum Jour. 10: 8-45. 



(446) 



1937. NOTES ON NORTH AMERICAN TEEES AND SHRUBS. Jour. Arnold Ar- 



boretum 18: 133-140. 

 (447) and STEYERMARK, J. A. 



1935. AN ANNOTATED CATALOGUE OF THE FLOWERING PLANTS OF MISSOURI. 



Mo. Bot. Gard. Ann. 22 : 375-758, illus. 



(448) PAMMEL, L. H. 



1915. NATIVE SHRUBS OF IOWA. Iowa State Hort. Soc. Trans. (1914) 



49: 34-43. 



(449) 1 MAoDoNALD, G. B., and CLARK, H. B. 



1916. THE NATIVE AND CULTIVATED FOREST TREES AND SHRUBS OF THE MIS- 



SOURI RIVER BASIN. Iowa Acad. Sci. Proc. (1915) 22: 23-56, 

 illus. 



(450) PATRAW, P. M. 



1936. CHECK-LIST OF PLANTS OF GRAND CANYON NATIONAL PARK. Revised 



by A. C. Hawbecker, Grand Canyon Nat. Hist. Assoc. Bull. 6, 

 75 pp. 



(451) PEARSE, C. K., and WOOLLEY, S. B. 



1936. THE INFLUENCE OF RANGE PLANT COVER ON THE RATE OF ABSORPTION 



OF SURFACE WATEB BY SOILS. Jour. Forestry 34 : 844-847. 



(452) PELLETT, F. C. 



1913. FOOD HABITS OF THE SKUNK. Iowa Acad. Sci. Proc. 20 : 307-309. 



(453) 



1930. AMERICAN HONEY PLANTS, TOGETHER WITH THOSE WHICH ARE OF 



SPECIAL VALUE TO THE BEEKEEPER AS SOURCES OF POLLEN. Ed. 3, 



rev. and enl., 419 pp., illus. Hamilton, 111. 



(454) PERRY, G. S. 



1932. THE COMMON TREES AND SHRUBS OF PENNSYLVANIA, NATIVE AND IN- 

 TRODUCED. Pa. Dept. Forests and Waters Bull. 33, rev., 127 pp., 

 illus. 



(455) PETERSEN, N. F. 



1923. FLORA OF NEBRASKA J A LIST OF THE FERNS, CONIFERS, AND FLOWER- 

 ING PLANTS OF THE STATE, WITH KEYS FOR THEIB DETERMINATION. 



Ed. 3, 220 pp. [Lincoln, Nebr.] 



(456) PIPER, C. V. 



1906. FLORA OF THE STATE OF WASHINGTON. U. S. Natl. Mus. Contrib. 

 U. S. Natl. Herbarium 11, 637 pp., illus. 



(457) and BEATTIE, R. K. 



1914. FLORA OF SOUTHEASTERN WASHINGTON AND ADJACENT IDAHO. 296 



pp., illus., Lancaster, Pa. 



(458) and BEATTIE, R. K. 



1915. FLORA OF THE NORTHWEST COAST, INCLUDING THE AREA WEST OF THE 



SUMMIT OF THE CASCADE MOUNTAINS, FROM THE FORTY-NINTH PAR- 

 ALLEL SOUTH TO THE CALAPOOIA MOUNTAINS ON THE SOUTH BORDER 



OF LANE COUNTY, OREGON. 418 pp. Lancaster, Pa. 



(459) PIHNIE, M. D. 



193i5. MICHIGAN WATERFOWL MANAGEMENT. 328 pp., illUS. Lansing, 



Mich. 



(460) PLUMMER, F. G. 



1911. CHAPARRAL. U. S. Forest Serv. Bull. 85, 48 pp., illus. 



(461) POLLARD, C. L. 



1908. CALYCANTHACEAE. North Amer. Flora 22: 237-238 



(462) POWERS, W. H. 



1927. FLORA OF THE UPPER MISSOURI VALLEY. S. Dak. Acad. Sci Proc 

 11: 85-100. 



