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Ludwigia Linnaeus. Seedbox, Water-primrose, Water-purslane.

Key to Ludwigia

A genus of about 82 species, herbs and shrubs, cosmopolitan.

ID notes:Many natural hybrids are known. Hybrids are generally recognizable from their intermediate morphology and usual association with their two parents. However some hybrids resemble one parent much more than the other, and some hybrids are found in populations independent (and even disjunct) from one or both parents. Allopolyploidy may have had a major role in the evolution of this genus, especially section Microcarpium, which has a majority of polyploid species.

Ref: Duke (1955); Eyde (1977); Eyde (1978); Eyde (1981); Harper (1904a); Hoch (2021a) In Flora of North America Editorial Committee (2021); Munz (1944); Munz (1965); Nesom & Kartesz (2000); Peng (1984); Peng (1986); Peng (1988); Peng (1989); Peng & Tobe (1987); Raven (1963); Raven & Tai (1979); Wagner, Hoch, & Raven (2007); Ward (2001); Ward (2012a); Zardini, Gu, & Raven (1991). 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© Gary P. Fleming | Ludwigia decurrens | Original Image ⭷
image of plant© Bruce A. Sorrie | Ludwigia alata | Original Image ⭷
image of plant© Gary P. Fleming | Ludwigia brevipes | Original Image ⭷
image of plant© Keith Bradley, some rights reserved (CC BY-NC), uploaded by Keith Bradley | Ludwigia ravenii source | Original Image ⭷
image of plant© Radford, Ahles and Bell | Ludwigia virgata | Original Image ⭷

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