Halberd-leaved Rosemallow Hibiscus laevis AllioniS3 (Watch list)  Synonyms: Hibiscus militaris.

Status:

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.

Description:

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 57 records in the project database.

View species at Maryland Plant Atlas

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Halberd-leaved Rosemallow in Montgomery Co., Maryland (7/31/2009). Photo by Bill Hubick. (MBP list)

Halberd-leaved Rosemallow in Montgomery Co., Maryland (7/31/2009). Photo by Bill Hubick. (MBP list)

Halberd-leaved Rosemallow in Charles Co., Maryland (9/25/2016). Photo by Wayne Longbottom. (MBP list)

Halberd-leaved Rosemallow in Montgomery Co., Maryland (7/28/2015). Photo by Elizabeth Miller. (MBP list)

Halberd-leaved Rosemallow in Washington Co., Maryland (8/4/2014). Photo by Jim Stasz. (MBP list)

Halberd-leaved Rosemallow in Frederick Co., Maryland (8/14/2014). Photo by Jim Stasz. (MBP list)

Halberd-leaved Rosemallow blooming in Cecil Co., Maryland (9/5/2013). Photo by Jim Stasz. (MBP list)

Halberd-leaved Rosemallow in Harford Co., Maryland (8/30/2017). Photo by Dominique Bayne. (MBP list)

Halberd-leaved Rosemallow in Montgomery Co., Maryland (8/2/2014). Photo by Jim Stasz. (MBP list)

Halberd-leaved Rosemallow in Anne Arundel Co., Maryland (10/1/2017). Photo by Robert Ferraro. (MBP list)

Halberd-leaved Rosemallow in Charles Co., Maryland (9/25/2016). Photo by Wayne Longbottom. (MBP list)

Halberd-leaved Rosemallow in Queen Anne's Co., Maryland (8/25/2013). This Queen Anne's County population is a probable introduced population since this species is not known to occur on the Delmarva Peninsula. Photo by Jim Brighton. (MBP list)

Halberd-leaved Rosemallow blooming in Harford Co., Maryland (8/30/2017). Photo by Josh Emm. (MBP list)

Halberd-leaved Rosemallow in seed in Harford Co., Maryland (8/30/2017). Photo by Josh Emm. (MBP list)

Halberd-leaved Rosemallow blooming in Montgomery Co., Maryland (8/31/2013). Photo by Ashley Bradford. (MBP list)

Halberd-leaved Rosemallow in Cecil Co., Maryland (9/5/2013). Photo by Jim Stasz. (MBP list)

Halberd-leaved Rosemallow in Harford Co., Maryland (8/24/2017). Photo by Josh Emm. (MBP list)

Halberd-leaved Rosemallow (winter aspect) in Montgomery Co., Maryland (2/18/2018). Photo by Bill Hubick. (MBP list)

Comparison of winter Halberd-leaved Rosemallow (right) and Crimson-eyed Rosemallow (left) in Montgomery Co., Maryland (2/18/2018). Photo by Bill Hubick. (MBP list)

Comparison of the leaf structure of Crimson-eyed Rosemallow and Halberd-leaved Rosemallow. Photo by Elizabeth Miller. (MBP list)


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