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Spring Flora of Oklahoma 
Whorled—A group of three or more similar organs radiating from 
a node. 
Winged—With a thin expansion. 
Woolly—Clothed with long, coiled, or matted hairs. 
Xerophyte—A plant adapted to desert conditions. 
Zygomorphic—A flower or organ which can be cut into similar 
halves by only one plane. 
