Sawtooth Sunflowers grow in large colonies in which each stem may be part of a clone. This species reproduces both vegetatively by rhizomes (underground stems) and also sexually (exchange of pollen between plants or clones). The name comes from the edges of the leaves which are often heavily saw-toothed. Sawtooth Sunflowers are common in the prairie areas of the Park. (Wolf. Oesterreich, 9/13/20)
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