Eupatorium vaseyi Porter

Locations ofEupatorium vaseyi Porter in Virginia

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Botanical Name
Eupatorium vaseyi Porter
Common Name
Vasey's Thoroughwort
Eupatorium album L. var. vaseyi (T.C. Porter) Cronq.; Eupatorium album L. var. monardifolium Fern.; Eupatorium sessilifolium L. var. vaseyi (Porter) Fern. & Grisc.
Flora of Virginia Name/Status
Eupatorium vaseyi Porter
Only a skeletal map for this species is currently available due to widespread misapplication of the name E. vaseyi, or lumping with other species. In the past, the name was misapplied to the species now known as E. godfreyanum. Subsequently, E. vaseyi was considered a var. of E. sessilifolium or E. album, the latter treatment (E. album var. vaseyi) maintained by FNA. As currently interpreted (Flora of Virginia 2012), this species is similar to E. album var. album, but has glabrate, acute, evenly serrate leaves (vs. pubescent, obtuse, regularly to irregularly often crenately toothed leaves in E. album) and its white-tipped phyllaries are less attenuate than those of E. album var. album.
Dry woodlands, clearings, old fields, and roadsides. The distribution and status of this species are incompletely known due to taxonomic and nomenclatural confusion. It appears to be widely distributed but infrequent over most of the state; additional field and herbarium studies are needed to confirm this.
Native Status

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