OXALIS ACETOSELLA PENNYROYAL, AMERICAN. 51 



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



White wood-sorrel; snamrock; sour trefoil. 

 Small, native, i^erennial herb, found in cold, damp woods, Canada ^outh to 



Michigan and North Carolina. 

 Part used. — Herb (nonofficial). 



Oxeye daisy. See Chrysanthemum leucanthemum. 



Oxydendrum arboreum (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. 



Farts used. — Leaves and bark (nonofficial) 



Palmetto, saw-. See Serenoa serrulata. 



Panax quinquefolium 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. 



Part used., — Eoot (nonofficial). 

 Pansy. See Viola tricolor. 

 Papoose-root. See CaulojjJtyllwn thalictroides. 

 Paradise-plant. See Daphne mezereum. 

 Parilla, yellow. See Menispermum canadense. 

 Parsley, spotted. See Conium maeidatum. 

 Parslej'-fern. See Tanacetum vulgare. 

 Parsnip, cow-. See Heracleum lanatam. 



Partlienocissus quinquefolia (L. ) Planch. Grape family (Vitaceae). 



Syvoiii/m . — A mpelopsis (/niiiqtiefolla Michx. 



American ivy; Virginia creeper. 



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



and Texas. 

 P<(rts used. — Bark and young twigs (nonofficial). 



Partridgeberry. See Mitchella 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. 



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



Passion-flower. See Passiflora incarnata. 

 Passion-vine. See Passiflora incarnata. 

 Paul's-betony. See Veronica oflicinalis. 

 Pawpaw, North American. See A.nmina triloba. 

 Pea, ground-squirrel. See Jefersonia diphylla. 

 Pea, hoary. See Cracca virginiana. 

 Pea, turkey-. See Bikukulla canadensis. 

 Pearl-plant. See Onosmodium virginianum. 

 Pencil-flower. See Stylosanthes hiflora. 

 Pennyroyal, American. See Hedeoma pulegioides. 



