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CCDB → Angiosperms → Onagraceae → Ludwigia → Ludwigia simpsonii Chapm.

2 chromosome counts in Ludwigia simpsonii Chapm.:

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		Name	Accepted Name	Gametophytic(n)	Sporophytic(2n)	Data Source	reference
		Ludwigia simpsonii Chapm.	Ludwigia simpsonii Chapm.	24		IPCN online	Peng, C. i. 1988. The biosystematics of Ludwigia sect. Microcarpium (Onagraceae). Ann. Missouri Bot. Gard. 75(3): 970–1009.
!		Ludwigia simpsonii Chapm.	Ludwigia simpsonii Chapm.		48	Fedorov, 1974	Gregory D. P., Klein 1960