64 WILD MEDICINAL PLANTS OF THE UNITED STATES. 



Seven-barks. See Hydrangea arborescens. 



Shagbark. See Hicoria ovata. t 



Shamrock. See Oxalls acetosella. 



Shamrock, water-. See Menyanthes trifoliata. 



Shave-grass. See Equiselum hyemale. 



Sheepberry. See Viburnum lentago. 



Sheep-laurel. See Kalmia angustifolia and A', latifolia. 



Sheep-sorrel. See Rumex acetosella. 



Shellbark-hickory. See Hicoria ovata. 



Shellflower. See Chelone glabra. 



Shepherd' s-purse. See Bursa bursa-pastoris. 



Shepherd's- weatherglass. See Anagallis arrensis. 



Shield-fern, marginal-fruited. See Dryopteris marginalis. 



Shrub, sweet-scented. See Butneria florida. 



Shrub yellowroot, See Xanthorrhiza apiifolia. 



Sicklewort. See Prunella vulgaris. 



Sidesaddle-flower. See Sarracenia purpurea. 



Silkweed. See Asclepias syriaca. 



Silkweed, rose-colored. See Asclepias incarnata. 



Silkweed, swamp-. See Asclepias incarnata. 



Silphium laciniatum L. Aster family ( Asteraceae ) . 



Rosinweed; compass-plant; pilotweed; polar-plant. 



Coarse, native perennial, 3 to 12 feet high, growing on prairies from Ohio to 

 Alabama, west to Texas and South Dakota. 



Part used. — Herb (nonoflicial). 

 Silphium perfoliatum L. Aster family (Asteraceae). 



Cup-plant; Indian-cup; ragged-cup. 



Stout, perennial herb, 4 to 8 feet high, native in moist soil and low ground from 

 Ontario and the eastern United States west to Louisiana and Nebraska. 



Part used. — Root (nonofficial). 

 Silverleaf. See Impatiens biflora, Spiraea tomentosa, and Stillingia sylvatica. 

 Silverleaf-poplar. See Populus alba. 

 Simpler' s-joy. See Verbena hastata. 

 Sinapis alba, See Sinapis alba L. 

 Sinapis alba L. Mustard family (Brassicaceae). 



Sinapis alba; white mustard; yellow mustard. 



Annual herb, about 2 feet in height, naturalized from Europe, and found in 

 fields and waste places, but not so widely distributed as the black mustard. 



Part used.— Seed (official). 

 Sinapis nigra. See Brassica nigra. 

 Sinapis nigra L. Same as Brassica nigra. 

 Skullcap. See Scutellaria lateriflora. 

 Skullcap, hyssop-. See Scutellaria integrifolia. 

 Skullcap, larger. See Scutellaria integrifolia. 

 Skunk-cabbage. See Spathyema foetida. 

 Skunk weed . See Spathyema foetida . 

 Sloe. See Viburnum prunifolium. 

 Smallpox-plant. See Sarracenia purpurea. 



