Hemianthus Nuttall.
A genus of 3-4 species, annual herbs, of se. North America and Central America. The recognition of Hemianthus as separate from Micranthemum is uncertain and needs additional study. Lewis (2019) states "morphological data (corolla and stamen structures) can be interpreted as providing support for recognizing the genus Hemianthus…, as was done by J.K. Small (1933) and F.W. Pennell (1935)".
Ref: Fischer In Kadereit (2004); Keener (2019b) In Flora of North America Editorial Committee (2019); Pennell (1935). Show full citations.
Hover over a shape, letter, icon, or arrow on the map to see what it means. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.