White Thoroughwort blooming in Dorchester Co., Maryland (9/17/2015).

View Record Details Photo by Jim Brighton MBP List

A closeup of the blooms of White Thoroughwort in Calvert Co., Maryland (8/22/2013).

View Record Details Photo by Jim Stasz MBP List

White Thoroughwort in Wicomico Co., Maryland (8/27/2015).

View Record Details Photo by Jim Brighton MBP List

Map Snapshot

58 Records

GA AL WA FR CL MO HO BA BC HA CE PG AA CV CH SM KE QA CN TA DO WI SO WO

Status

White Thoroughwort should be compared with Eupatorium vaseyi. Historic records of Eupatorium album, E. fernaldii (not yet reported from Maryland) and E. vaseyi may be conflated.

Description

White Thoroughwort has sessile, simple, lanceolate leaves and long-attenuate inner phyllaries. The leaves of White Thoroughwort are generally more than 6 cm long and 1.5 cm wide. It can be distinguished from similar-looking species by the shape and width of the leaf, the distribution of hairs on the stem, and the presence of resin glands on the leaves and phyllaries.

See Eupatorium vaseyi for comparison of the most-similar species.

Relationships

Host plant for the Bonset Borer Moth.

Seasonality Summary

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Resources

View at iNaturalist Search Google Images Search MBP Facebook posts

View at Maryland Plant Atlas Search Flora of North America Search Mid-Atlantic Herbaria Consortium Search Norton-Brown Herbarium Search MNPS Facebook posts

Citations

No citations linked for this taxon yet.

Use of media featured on Maryland Biodiversity Project is only permitted with express permission of the photographer.

White Thoroughwort blooming in Dorchester Co., Maryland (9/17/2015). View Record Details Media by Jim Brighton.

A closeup of the blooms of White Thoroughwort in Calvert Co., Maryland (8/22/2013). View Record Details Media by Jim Stasz.

White Thoroughwort in Wicomico Co., Maryland (8/27/2015). View Record Details Media by Jim Brighton.