Porter, Joseph. 



A list of plants giowii s without miltivatioii in Maiden and Medford, Mass., with 

 some contributions to a tlora of Middlesex County. 

 19 pp. Maiden, 1881. 



A partial list of the native flora of AValtham, Mass. 

 3fi pp. Waltham, 1S83. 



(Published b^' The Botany Club of Waltham.;) 



Porter, Thomas Conrad. 



Flora of Pennsylvania, ed. by J.'K. Small. 

 362 pp. Boston, 1903. RJ-P 848 



Catalogue of plants. 



(Hayden's Geological Survey of Territories, pp. 477-483, 1871.)* 



Enumeration of the indigenous and naturalized plants found growing in the county 

 of Lancaster, Pa. 



(Mombert's Authentic History Lancaster County, pp. 580-604. Lancaster, 



1869.) 



List of plants collected by Mr. T. A. Culbertson on an expedition to the Mauvaises 

 Terres and upper Missouri in 1850. 



(5th Ann. Rep. Smithsonian Inst., pp. 3 33-136, 1850.) 



Rare plants of southeastern Pennsylvania. 

 8 pp. Easton, Pa., 1900.* 



Sketch of the botany of Pennsylvania. 



(From Walling & Gray's Topographical Atlas of Pennsylvania, pp. 25, 26, with 

 map, showing distribution of the plants. Philadelphia, 1872.) 



Porter, Thomas C, and Coulter, John M. 



Synopsis of the flora of Colorado. 



180 pp. Washington, 1874. RO-P 848 



(Misc. Puld. no. 4, IT. .S. Geol. & Geog. .Survey of the Territories.) 



Pound, Roscoe, and Clements, Fred E. 

 The phytogeography of Nebraska. 

 I ed. pp. Lincoln. 1898. 



• 2 ed. 442 pp. Lincoln, 1900. RN-P 876 



(Botanical .Survey, Lhiiversity of Nebraska.) 



Price, Sadie F. 



Flora of Warren County. Kentucky. 

 31 ]ip. n. p., 1893. 



Trees and shrubs of Kentucky. 

 6 pp. n. p., 1898.* 



Pringle, C. G. 



Flora of Arizona and Sonora. 



3 pp. n. p., 1884.* 



Plantae Mexicanae. 



4 pp. n. p., 1885.* 



Provancher, L. 



Flora Canadienne. 



Vol. I, 474 pp. Quebec. i8t'i2. RE-P 969 

 2. +842 pp. Quebec. 1862. RE-P 969 



Liste des plantes recontrer aux Isles de la Madeline. 

 (Le Nat. Cand. XIX. p. 346, 1890.) 



Pursh, Frederick. 



Flora Americae septentrionalis. 



Vol. I, 358 pp. London. 1814. 



RF-P 986 

 2,4-751 pp. +24 pis. London, 1S14. 



RF-P 986 

 Reprint, Vol. i, 358 pp. London. 1816. 



2,4-751 pp. +24 pis. London. 1816. 



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