56 WILD MEDICINAL PLANTS OF THE UNITED STATES. 





Prairie-pine. See Ladnaria spicata. 



Prenanthes alba L. Same as Xahalus albus. 



Prenanthi 8 serpentaria Pursh. Same as Nabalm serpentarius. 



mericuuum 



Prickly ash, northern. See Xanthoxylum i 



Prickly ash, southern. See Fagara dava-herculw. 



Prideweed. See Erigeron canadensis. 



Prim. See Ligusirurn vulgare. 



Primrose, evening-. See Oenothera biennis. 



Primrose, tree-. See Oenothera biennis. 



Primwort. See Ligustrum vulgare. 



Prince's-pine. See ChimaphUa umbeUata. 



Prinm verticUlatu* L. Same as Hex vertirillata. 



Privet. See lAgu&nm vulgare. 



Prunella vulgaris L. Mint family ( Menthaceae ) . 



Self-heal; heal-all; brownwort; sicklewort; blue-curls. 



Perennial plant, 2 inches to 2 feet high, naturalized from Europe, and found 



m fields, woods, and waste places throughout nearly the whole of North 

 America. 



pari used. — Herb (non official). 



Primus serotina Ehrh. Pl um family ( Amygdalaceae ) . 



Synonym. — Pnmus rirginiana Mill., not of Linnaeus. 



Primus virginiana; wild cherry; rum-cherry. 



A large, indigenous tree, 50 to 80 feet high, growing in woods or open places from 

 Ontario to Florida, west to Texas and Dakota. Most abundant in the South- 

 western States. 



Part used.— Bark, which should be collected in autumn and carefully dried and 

 preserved (official). 



Primus virginiana. See Primus serotina. 



Prunus rirginiana Mill., not L. Same as Prun><* serotina. 



Psoralea. See Psoralea pedunculata. 



Psoralea rndilotoides Michx. Same as Psoralea pedunculata. 



Psoralea pedunculata (Mill. ) Vail. Pea family (Fabaceae). 



Sf/uo, ///. — Psoralea meKhkndes Michx. 



Psoralea; Samson's-snakcroot; Congo-root. 



Slender, herbaceous perennial, 1 to 2\ feet high, native in drv soil in open woods 

 from Ohio and Kentucky southward. 



Farts used.— Root and leaves (nonofiicial ). 



Ptelea trifoliata L. Rue family (Rutaceae). 



Wafer-ash; wingseed; hop-tree; shrubby trefoil. 



Native shrub, 6 to 8 feet high; in shady woods from New York to Florida, west 



to Minnesota and Texas; grows more abundantly west of the Alleghenies. 

 Porto usi '/.—Bark of root, fruit, and leaves (nonofficial). 



Pterocaulon undulatum (Walt.) Mohr. Aster family (Asteraceae). 



Synonym.— Gnaphaliuvi undulatum Walt 



Indian blackroot. 



Native perennial herb, growing in sandy pine lands from North Carolina to 

 t londa and Mississippi. 



Part used.— -Root (nonofficial). 

 Puccoon, red. See Sanguinaria canadensis. 

 Puccoon, yellow. See Hydrastis canadensis. 



Pulsatilla, American. See Pulsatilla MratUimnia. 





