CUXTENTS. 



Page. 



Introduction ^ 



The collt'ctii)n of root drugs It^ 



Plants furnishing root drugs 11 



Male-fern ( Drijopteris filic-mns and D. uiurginaUs) 11 



Couch-grass ( Agropyron repens) 1 - 



Wild turnip ( .1 rl.<«ieiiia tripJinlhuii ) ' 1 -^ 



Skunk-cabbage (SjjutltyeiiKi jodidit ) 15 



Sweet-flag ( Acorus calnmus) 1<> 



Chamaeliriuui, or Ilelonias {Chamaelirinm Inteum) 1" 



American hellelx >re ( I 'eratrum lirlde) If^ 



Aletris ( Ale.tris farhiosa ) 1*^^' 



Bethroot ( T)-illium erectum ) 20 



Wild yam ( Dioscorea villosa) -1 



Blue flag ( Iris versicolor) 22 



Lad y's-slipper {Ci/pripedium hirsntnm and ( '. parviflormn ) 23 



Crawley-root ( Condlorhha odontorhiza) 24 



9, 



J 



Canada snakeroot ( Asarum canadeyise) 



Serpentaria {Aristolochin serpentaria and . I . reticulata) 26 



Yellow dock {Rume.c crispus) 27 



Pokeweed ( Phytolacca decandra) 29 



Soapwort ( Sajxmaria officinalis ) 31 



Goldenseal {Hydrastis canadensis) 31 



Goldthread ( Coptis trifolia) ' 34 



Black cohosh ( Cimicifuga racemosa ) 35 



Oregon grape ( Berberis aquifolium) — 36 



Blue cohosh ( Caulophyllum ihalictroides) 37 



Twinleaf {Jeffersonia diphylla) 38 



May-apple {Podophyllum peUatum) 39 



Canada moonseed ( Menispermum canadense) '. 40 



Bloodroot ( Sanguinaria canadensis) •: - 40 



Hydrangea ( Hydrangea arborescens) 41 



Indian-physic {Porteranthus trifoliatus ) 42 



Wild indigo ( Baptisia tinctoria ) 43 



Crane's-bill ( Geranium macidatum) 44 



Seneca snakeroot ( Polygala smega) _ 45 



Stillingia {StilUngia sylvatica) 47 



Wild sarsaparilla {Aralia nudicaidis) 48 



Ginseng ( Panax quinquefolium) , 49 



Water-eryngo ( Eryngium yuccifolium) 50 



American angelica {Angelica atropurpurea) 51 



Yellow jasmine or jessamine ( Gelsemium serapervirens) 51 



107 



5 



