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OXALIS ACJBTOSELLA — PENNYROYAL, AMERICAN. 51 



Oxalis acetosella L. Wood-sorrel family (Oxalidaceae). 



White wood-sorrel; snamrock; soar trefoil. 



Small, native, perennial herb, found in cold, damp woods, Canada south to 



Michigan and North Carolina. 

 Part mecL — Herb (nonofficial). 



Oxeye daisy. See Ckrymnthemum leucaotJtemum. 



Oxydendrum arbor eum (L. ) DC. Heath family (Ericaceae). 



Synonym. — Andromeda arborea L. 



Sourwood; sorrel-tree; elk-tree. 



Native tree, sometimes 40 to 50 feet in height, growing in rich woods from Ohio 



to Maryland, south to Alabama and Florida, 

 Paris used.— Leaves and bark (nonofficial) 



Palmetto, saw-. See Serenoa serrulate. 



Panax quin que folium L. Ginseng family ( Araliaceae ) . 



Ginseng. 



Native, perennial herb, about 1 foot in height, found in rich, shady woods 



from the Middle and Northern States south to Alabama and Georgia, 



pari used. — Root (nonofficial). 

 Pansy. See Viola tricolor. 

 Papoose-root. See ( kmhpkffUmn thalirtmides. 

 Paradise-plant, See Daphne mezermm. 

 Parilla, yellow. See Menispermwm camadense. 

 Parsley, spotted. See Comum maculatum. 

 Parsley-fern. See Tanacehm vtdgare. 

 Parsnip, cow-. See Herademn lanatum. 

 Parthenocissus quinquefolia ( 1, ) Planch. Grape family ( Vitaceae). 



Synon >/)».— A mpelopsis quinquefolia Miehx. 



A meriean ivy; Virginia creeper. 



A common, woody vine, native in woods and thickets from Canada to Florida 

 and Texas. 



Parts used.— Bark and young twigs (nonofficial). 



Partridgeberry. See MticfoeUa repens. 

 Pasqueflower, American. See Pulsatilla hirsutissima. 



Passiflora incarnata L. Passion-flower family (Passifloraceae). 



Passion-flower; passion-vine; may-pops. 



Climbing, perennial plant, native in dry soil from Virginia to Florida, westward 



to Missouri and Arkansas. 

 Parte used.— Root and stem base (nonofficial). 



Passion-flower. See Pamiflora inca ita. 

 Passion-vine. See Passiflora incarnata. 

 Paul's-oetony. See Veronica officinalis 

 Pawpaw, North American. See Asimma triloba. 

 Pea, -round-squirrel. Bee J&erm Eadq&fcyBo- 

 Pea, hoary. See Cracca nrginia»<(. 



Pea, turkey-. See Biknkidla Gonad ms. 

 Pearl-plant. See Onosmodmm mrgk mum. 

 Pencil-flower. See Stylosanthes bifiora* 

 Pennyroyal, American. 3ee Hed ma puleoioides. 



