Tiny flowers in leaf axils

jekeesl (south-central Arkansas)(7b)July 25, 2014

These plants were about 2 feet tall, and highly branched. They were growing in a sunny ditch that stays wet from sprinkler run-off. They had single flowers in leaf axils that were about 1/4 inch long. All leaves were lanceolate, and 4 to 6 times as long as wide. Lower leaves were up to 4 inches long, but most leaves were much smaller - about 1/2 to 1 inch long. The second photo shows a fruiting flower, an open flower, and a bud. The third photo shows a close shot of the open flower, which does not have petals.

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jekeesl (south-central Arkansas)(7b)

I've been pounding the keys, and think this could be Ludwigia glandulosa.

    Bookmark   July 25, 2014 at 10:08PM
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lycopus(z5 NY)

I thought it looked like a Ludwigia but none that I was familiar with.

    Bookmark   July 26, 2014 at 8:58AM
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jekeesl (south-central Arkansas)(7b)

Thanks lycopus. Online Ludwigia glandulosa information is somewhat misleading. The keys describe this native species as upright, growing to 36 inches tall. But almost all of the online photos are of the aquarium version, which is typically 2-5 inches tall and fully submersed. I did find a link to a collection of the native in Texas, which is very much like my plant. I'm guessing that this one is often overlooked or misidentified.

Here is a link that might be useful:

    Bookmark   July 26, 2014 at 12:35PM
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