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Pterocaulon
Also called Blackroots
Pterocaulon is a genus of flowering plants in the sunflower family, native to North and South America and to Australasia. Blackroot is a common name for species native to North America.
The plants are perennial herbs, frequently densely covered with woolly hairs. The generic name means "winged stem," referring to the decurrent leaf bases that give the appearance of wings running down the sides of the stems.
Text excerpted from the Wikipedia article Pterocaulon by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
