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This plant was found in the "drylands" section of a public conservatory (you can see a potted cactus in the background). It did not have a label, and there was nobody around to ask about it. The plant has hanging stems about a meter long, with spherical leaves about five millimeters in diameter -- the leaves appear to be genuinely spherical, not curled-up flat leaves.

Any idea what it is?

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    $\begingroup$ you could have googeled "hanging plant with spherical leaves" $\endgroup$ Sep 24, 2023 at 9:58
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    $\begingroup$ Top result was a Wikipedia article for a plant with spherical fruit, and the next several were plants with curled-up leaves. Google doesn't have all the answers. $\endgroup$
    – Mark
    Sep 24, 2023 at 18:44

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It seems that this might be Curio rowleyanus, sometimes called "string-of-pearls". The Wikipedia article indicates it has spherical leaves about 6mm in diameter on trailing stems up to about a meter. It is a succulent and the spherical leaves reduce evaporation for volume contained. It grows in the dry parts of southwest Africa.

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  • $\begingroup$ BTW, my Google query was simply plant with spherical leaves. $\endgroup$
    – mgkrebbs
    Sep 24, 2023 at 19:24
  • $\begingroup$ Looks correct to me. Incidentally, there are a bunch of similar "String of..." plants in the same or very closely related genus Senecio, and they are all very easy to propagate from the leaves and stem, so are incredibly popular houseplants at the moment. $\endgroup$
    – bob1
    Sep 24, 2023 at 20:12

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