Yarrow
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“Head of yarrow. A, top view; B, lengthwise section. re, receptacle; i, involucre; r, ray-flowers; d, disk-flowers; c, corolla; s, stigma; ch, chaff, or bracts of receptacle.” -Bergen, 1896
Galleries
Flowers and Shrubs: W-ZSource
Joseph Y. Bergen, A. M. Elements of Botany (Boston, MA: Ginn & Company, 1896)
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