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PLATE 87 
ROSETTE CRYSTALS AND SOLITARY CRYSTALS OCCURRING IN 
. Cascara sagrada bark (Rhamnus purshiana, D.C.). 
. Frangula bark (Rhamnus frangula, L.). 
. Cundurango bark (Marsdenia cundurango, [Triana] Nichols). 
. Dogwood root bark (Cornus florida, L.). 
. Pleurisy root (Asclepias tuberosa, L.). 
