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Juba's bush (Iresine diffusa, Amaranthaceae)
Native
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Simmonds' aster (Symphyotrichum simmondsii, Asteraceae)
Native
Native
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Muck sunflower (Helianthus simulans, Asteraceae)
Not native
This sunflower is primarily distinguished from its close relative, swamp sunflower (H. angustifolius), by the width of its leaves. According to Flora of North America (eFlora.org), H. angustifolius is 50-150 cm tall; leaves are 8-15 cm long and 0.15-0.5(-1) cm wide. H. simulans is 150-260 cm tall; leaves are 9-22 cm long and 0.7-4 cm wide.
The leaves shown here are about 11 cm long and 1.5 cm wide, thus identifying them as H. simulans.
Both species have leaves with margins rolled under; however, because of the very narrow width of leaves in H. angustifolius, the rolled margins nearly obscure the underside of the leaves.
See Muck Sunflowers, October 7, 2012, this blog.
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