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Hydrocotyle Linnaeus. Common name: Water-pennywort.

Key to Hydrocotyle

A genus of about 180 species, perennial and annual herbs, cosmopolitan (especially Australia) (Plunkett et al. 2018b). Molecular analyses have clarified that the affinities of Hydrocotyle lie with the Araliaceae rather than the Apiaceae (Downie et al. 1998; Chandler & Plunkett 2004).

ID notes: Some weedy species (H. sibthorpioides) can superficially resemble Glechoma; the latter can be distinguished by its 4-angled stems and opposite leaves (vs. rounded stems and alternate leaves).

References: Aaron (2024); Darby (1855); Mathias & Constance (1945); Mohr (1901); Nesom & Levin (2024a) In Flora of North America Editorial Committee (2024); Plunkett et al. (2018b) In Kadereit & Bittrich (2018). Show full citations.

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Hover over a shape, letter, icon, or arrow on the map for definition or see the legend. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.

image of plant© Keith Bradley | Hydrocotyle bonariensis | Original Image ⭷
image of plant© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Bruce A. Sorrie | Hydrocotyle bonariensis | Original Image ⭷
image of plant© John Gwaltney | Hydrocotyle ranunculoides | Original Image ⭷
image of plant© Bruce A. Sorrie | Hydrocotyle umbellata | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷

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