64 WILD MEDICINAL PLANTS OF THE UNITED STATES. 



Seven-btirks. i^ee lli/dmugeu arborexceni^. 



Shagbark. See Hicoria ovata. 



Shamrock. See O.ralh acetosella. 



Shamrock, water-. See Menyanlhes frifnliatn. 



Shave-grass. See Equiselnm hyemale. 



Sheepberry. See Vihurinnn lenUigo. 



Sheep-laurel. See Kalmia angudifolia and K. hififoVia. 



Sheep-sorrel. See Rume.v acetosella. 



Shellbark-hickory. Sae'Hicoria ovata. 



Shellflower. See Chelone glabra. 



Shepherd' s-purse. See Bursa ha;r.<<a-j)aslori.^. 



Shepherd's-weatherglai?s. See AnagalUs arremis. 



Shield-fern, marginal-fruited. See Dri/ajt/n-in niaiyinalis. 



Shrub, sweet-scented. See Bulneriajlorida. 



Shrub yellowroot. See Xanthorvhka aplifolia. 



Sicklewort. See Prunella vulgaris. 



Side?addle-fiower. See Sarrarenia p'urpurca. 



Silkweed. See Asdepias syriaca. 



Silkweed, rose-colored. See Asdepias incarnata. ^ 



Silkweed, swamp-. See Asdepias 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 

 Alal)ama, west to Texas and South Dakota. 



Part used. — Herb (nonofficial). 

 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 t«> Louisiana and Nebraska. 



Part used. — Root (nonofficial). 

 Silverleaf. See Impatiens biflora, Spiraea tomeutosa, and Stdlbigia .^yl/alira. 

 Silverleaf-poplar. See Populus alba. 

 Simpler' s-joy. See Verbena hastata. 

 Sinapis alVja. See Sinapis alba L. 

 Sinapis alba L. Mustard family ( Brassicaceae). 



Sinapis alba; white mustard; yellow mustard. 



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

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



Par< ((.sed.— Seed (oflScial). 



Sinapis nigra. See Brassica nigra. 



Sinapis nigra L. Same as Bras.Kica 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 Vitmnnun prunifolium. ' 



Snialliiox-planl. '^w Sarracenia jnirpnrra. 



