Synonyms: Hibiscus militaris.
Halberd-leaved Rosemallow is known from only a few locations in Maryland. 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. In Maryland, the main populations of Halberd-leaved Rosemallow occur along the banks of the Potomac and Susquehanna Rivers. Habitats for Halberd-leaved Rosemallow include exposed riverbanks and shorelines.
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 134 records in the project database.
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