White willow (Salix alba) catkins

White willow (Salix alba) catkins

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Credit: MARTYN F. CHILLMAID/SCIENCE PHOTO LIBRARY

Caption: White willow (Salix alba) catkins. Young female catkins (flowers) and leaves on a white willow branch. The bark and leaves of this plant were originally the source of the active ingredient in aspirin, salicylic acid.

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Keywords: analgesic, angiosperm, angiosperms, aspirin, biochemical, biochemistry, biological, biology, black background, botanical, botany, branch, catkin, catkins, chemical, chemistry, female, flower, flowering, flowers, foliage, leaf, leaves, medical, medicinal, medicine, pain-killer, painkiller, pharmaceutical, pharmaceutics, pharmacological, pharmacology, plant, plants, salicylic acid, salix alba, source, tree, white willow

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