Eupatorium compositifolium
Distinguishing Features: minute, wind pollinated heads, pubescent stems, and pubescent and gland dotted phyllaries .
Habitat: pond margins and wet low places
Geographic Distribution : Virginia west to Oklahoma and south to Texas and Florida
Similar Species: Eupatorium capillifolium has phyllaries that are glabrate and lack glands, as well as narrower leaves; and E. leptophyllum has glabrous stems and flowering branches that are recurved and secund
Molecular Data : samples of E. compositifolium (DNA #s ) are identical or nearly so to Eupatorium capillifolium and E. leptophyllum ; these differ by a minimum of 1 indel and 12 bp from all other Eupatorium species
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