FOREST BOTANY 231 



Pammel, L. H. (4569) 



the forest flora of hardin county. Iowa Geol. Survey Ann. Rept. 10: 

 306-313. 1899. 



(4570) 



the forest flora of southern Mississippi. Ames Forester 12 : 31-35. 1924. 



(4571) 



forest vfgetation of the upper Mississippi. Gard. and Forest 4: 460-462, 



472, 531-532, illus. 1891. 



(4572) 



grasses of the national forests of the rockies. Ames Forester 2 : 41-54, 



illus. 1914. 



(4573) 



some notes on trees of the sierras. Ames Forester 10: 45-57, illus. 1922. 



MacDonald, G. B., and Clark, H. B. (4574) 



THE native and cultivated forest trees and SHRUBS OF THE MISSOURI river 



basin. Iowa Acad. Sci. Proc. 22 : 23-56, illus. 1915. 



and Cratty, R. I. (4575) 



NOTES ON SOME PLANTS OF THE ARAPAHO NATIONAL FOREST AND ROCKY MOUNTAIN 



national park. Iowa Acad. Sci. Proc. 27 : 51-73, illus. 1920. 



Panama Canal. (4576) 



a handbook of the principal trees and shrubs of the ancon and balboa 

 districts, panama canal zone, subdivided into sections according to 

 location of plants. 91 pp., illus. Washington, D. C. 1925. 



Parkhurst, H. E. (4577) 



TREES, SHRUBS, AND VINES OF THE NORTHEASTERN UNITED STATES \ THEIR CHAR- 

 ACTERISTIC LANDSCAPE FEATURES FULLY DESCRIBED FOR IDENTIFICATION BY 

 THE NON-BOTANICAL READER ; TOGETHER WITH AN ACCOUNT OF THE PRINCIPAL 

 FOREIGN HARDY TREES, SHRUBS, AND VINES CULTIVATED IN OUR COUNTRY, AND 

 FOUND IN CENTRAL PARK, NEW YORK CITY. 451 pp., illuS. New York. 



1903. 

 Parish, S. B. (4578) 



AN ENUMERATION OF THE PTERIDOPHYTES AND SPERMATOPHYTES OF THE SAN 



Bernardino mountains. Calif. Plant World 20 (6) : 163-178, illus. 1917. 



(4579) 



A SKETCH OF THE FLORA OF SOUTHERN CALIFORNIA. Bot. GaZ. 36 : 202-222, 



259-279. 1903. 



Paul, J. H., and Barnes, C. T. (4580) 



forest groves and canyon streams. 228 pp., illus. Salt Lake City, The 

 Desert News. 1913. 



Peet, L. H. (4581) 



TREES AND SHRUBS OF CENTRAL PARK. 363 pp., illllS. New York. 1903. 



(4582) 



trees and shrubs of prospect park. Ed. 3, 237 pp., illus. New York. 1906. 



Penhallow, D. P. (4583) 



A MANUAL OF THE NORTH AMERICAN GYMNOSPERMS EXCLUSIVE OF THE CYCADALES, 

 BUT TOGETHER WITH CERTAIN EXOTIC SPECIES. 374 pp., illllS. Boston. 1907. 



Perry, G. S. (4584) 



HOW TO KNOW THE COMMON TREES AND SHRUBS OF PENNSYLVANIA, NATTVE AND 



introduced. Pa. Dept. Forests and Waters Bull. 33, rev., 91 pp. 1926 



Philadelphia Commissioners of Fairmount Park. (4585) 



catalogue of trees and shrubs native of and introduced in the horti- 

 cultural gardens adjacent to horticultural hall, in fairmount park. 

 Philadelphia. 99 pp. Philadelphia. 1880. 



Piche, G. C. (4586) 



liste des principaux arbres et arbrisseaux indigenes ou naturalises de 

 la province de Quebec. 8 pp. Montreal. 1907. 



Piper, R. U. (4587) 



the trees of America. 64 pp., illus. Boston. 1855-58. 



