Abstract
Quina (Strychnos pseudoquina A. St. Hil.). Loganiaceae, a native tree from the Brazilian savannah, is widely used in npopular medicine. In the present study, quina leaves of plants grown in glasshouse or at field conditions were anatomically and histochemically characterized. For the anatomical studies transverse sections taken from the middle third of leaves were stained with 0.05% toluidine blue, pH 4.0. Leaf samples were diaphanized and stained with 1% safranine to study the leaf surface.
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