Ludwigia clavellina var. grandiflora(Michx.) M.Gómez
Ludwigia uruguayensis(Cambess.) H.Hara
Ludwigia uruguayensis var. major(Hassl.) Munz
Ludwigia grandiflora, the water primrose, is an aquatic plant of the order Myrtales.[2]
It is closely related and easily confused with Ludwigia hexapetala.[3] The two species can be distinguished at a chromosomal level, because L.grandiflora is hexaploid and L.hexapetala is decaploid.[4] However, they can be distinguished morphologically. L.grandiflora has villous hairs, smaller flowers and smaller pollen grains.[4] Some authorities consider that these differences are too slight to consider these different species and so separate these taxa as two varieties or two subspecies.[5][6]
^"Ludwigia grandiflora (Michx.) Greuter & Burdet". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 20 July 2023.
^"The Plant List: A Working List of All Plant Species". The Plant List. Archived from the original on 27 January 2020. Retrieved 27 January 2020.
^Jacono, Colette. "Identification of common aquatic water-primrose species, Ludwigia, in Florida" (PDF). Archived (PDF) from the original on 2020-01-31. Retrieved 2020-01-27.
^ abZardini, Elsa M.; Gu, Hongya; Raven, Peter H. (1991). "On the separation of two species within the Ludwigia uruguayensis complex (Onagraceae)". Systematic Botany. 16 (2): 242. doi:10.2307/2419276. JSTOR 2419276.
^Ward, Daniel Bertram (2012). "New combinations in the Florida Flora III". Phytologia. 94 (3): 459–485. Archived from the original on 2020-01-28. Retrieved 2020-01-28 – via Biodiversity Heritage Library.
^Nesom, Guy; Kartesz, John (2000). "Observations on the Ludwigia uruguayensis complex (Onagraceae) in the United States". Castanea. 65 (2): 123–125. JSTOR 4034110.
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