CONTENTS 



Page. 



Introduction 7 



The collection of barks 8 



Trees and shrubs furnishing medicinal barks 9 



White pine ( Pinus strobus) 9 



Tamarack [Larix laricina ) 10 



Aspen ( Populus tremuloides) 11 



White willow (Salix alba) -— 12 



Bayberry (Myrica cerifera ) 14 



Butternut (Juglans cinerea ) 15 



Ironwood ( Ostrya virginiana) 15 



Sweet birch (Betula lenta ) 16 



Tag-alder ( A Inus rugosa ) 18 



White oak (Quercus alba) 18 



Slippery elm ( Ulmus pubescens) 20 



Magnolia ( Magnolia acuminata, M. tripetala, and 3/. glauca ) 21 



Tulip-poplar (Liriodendron Udipifera) 23 



Sassafras (Sassafras sassafras) 25 



Spicebush ( Benzoin benzoin ) 26 



Witch-hazel ( Hamamelis virginiana ) 27 



Blackberry ( Rubus villosus, R. nigrobaccus, and R. cuneifolius) 28 



American mountain-ash (Sorbus arnericana) 29 



Wild cherry (Prunus serotina ) 30 



Prickly ash (Xanthoxylum americanum and A', clava-herculis) 31 



Wafer-ash (Ptelea trifoliata) 33 



Black alder (Rex verticillata ) 34 



Wahoo ( Euonymus atropurpureus) 35 



False bittersweet ( Celastrus scandens ) 36 



Horse-chestnut ( Aesculus hippocastanum ) 37 



Cascara sagrada (Rhamnus purshiana ) 38 



Cotton ( Gossypium hirsutum) 40 



Dogwood ( Cornus florida) 41 



Moosewood ( Dirca palustris) 43 



White ash ( Fraxinus arnericana) 44 



Fringe-tree ( Chionanthus virginica) 45 



Bittersweet (Solanum dulcamara) 46 



Buttonbush ( Cephalanthus occidentalis ) 47 



Cramp-bark tree ( Viburnum opulus) 48 



Black haw ( Viburnum prunifolium) 48 



Index 51 



139 



5 



