I love flowers, and often a flowering plant just doesn't get its due if it is not the plant equivalent of what in the animal world are called charismatic megafauna. These Rattlesnake masters are a common plant here in Kansas but usually overlooked. They are not showy but I find them hard to resist. Fortunately, at least some horticulturalists agree with me.
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According to this site it was used to treat exhaustion from sexual depletion. Hmmmm.