Synonyms: Hibiscus militaris.
Halberd-leaved Rosemallow occurs throughout the eastern and central United States. In Maryland it is known from only a few locations. This native hibiscus is tracked by the Maryland Natural Heritage Program, which has put the plant on the state watchlist with a rank of S3. The plant prefers moist or damp areas, such as exposed riverbanks and shorelines. Its main populations in the state are along the banks of the Potomac and Susquehanna rivers.
Halberd-leaved Rosemallow is a very tall herbaceous flowering plant whose stems become somewhat woody as the season progresses, giving the plant a shrub-like appearance. The large flowers may range in color from an almost-white light pink to dark pink, always with a darker throat. Because of the range of color in the flowers, Halberd-leaved Rosemallow can be confused with Crimson-eyed Rosemallow. The leaves of Halberd-leaved Rosemallow have truncated bases and three lobes; the lobes are pointed, and the middle lobe is much longer than the other two. The leaves of Crimson-eyed Rosemallow have wedge-shaped bases and are oval, tapering to a long point.
Bloom times in the Maryland Biodiversity Project database range from 7/15 to 9/25.
There are 137 records in the project database.
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