Another Helianthus from Crystal in SC

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Roadside. Upland conditions. Leaves stem glaborous. Flowers 1.5″-2″.

Hi Crystal,

this is another of the difficult perennial sunflowers, genus Helianthus. Probably different from the other one you submitted, and it could key out to Helianthus giganteus because I see so many alternate leaves. You state that the stems are glabrous, but I see pubescence on the stems. We are left with most of the same possibilities as in the other Helianthus for which you sent images.

Again, sorry I cannot be of  more help. One would need the plant in hand and several good identification keys.


Steven Hill, Ph.D., Botanist SCNPS

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