sentence: procyanidin b2 can be found in cinchona pubescens ( chinchona , in the rind , bark and cortex ) , in cinnamomum verum ( ceylon cinnamon , in the rind , bark and cortex ) , in crataegus monogyna ( common hawthorn , in the flower and blossom ) , in uncaria guianensis ( cat 's claw , in the root ) , in vitis vinifera ( common grape vine , in the leaf ) , in litchi chinensis ( litchi , in the pericarp ) , in the apple , and in ecdysanthera utilis .