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Key to Ludwigia

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https://fsus.ncbg.unc.edu/main.php?pg=show-key.php&keyid=40104

Show caption*© Jake Smith, some rights reserved (CC BY-NC), uploaded by Jake Smith Show caption*© Eric M Powell, some rights reserved (CC BY-NC), uploaded by Eric M Powell 1 Leaves opposite; plants creeping (rooting at the nodes); [section Isnardia]  Key to Ludwigia, Key A: Ludwigia with opposite leaves (section Isnardia)

Show caption*© Douglas Goldman, some rights reserved (CC BY-SA), uploaded by Douglas Goldman 1 Leaves alternate; plants erect or ascending (not rooting at the nodes), or creeping (rooting at the nodes).

2 Stamens 8-14; sepals 4-7; petals 4-7; [of various habits, including annual and perennial herbs and shrubs, variously erect, ascending, creeping, or forming floating mats]  Key to Ludwigia, Key B: Ludwigia with alternate leaves, 8-14 stamens, 4-7 sepals, and 4-7 petals (sections Pterocaulon, Macrocarpon, Seminuda, and Jussiaea)

2 Stamens 4; sepals 4; petals 0-4; [perennial herbs, with erect ascending flowering stems]  Key to Ludwigia, Key C: Ludwigia with alternate leaves, 4 stamens, 4 sepals, and 0-4 petals (sections Ludwigia and Microcarpium)

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