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  Ulearum donburnsii
From: Nils Weessies <nilsweessies at gmail.com> on 2020.05.30 at 21:54:41(24341)
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Hi all,

Ulearum donburnsii Croat & Feuerstein is a tiny neotropical aroid only known from Ecuador near the eastern border with Peru. Surprisingly it can be propagated by cutting off leaves at the petiole and leaving it in moss/soil. Over time a rhizome will form at the cut. Other Ulearum can also be propagated this way, I do not know of any other neotropical genera propagatable by leaf cuttings.

Photos are of an adult flowering plant, leaf progress at a few weeks, 4,5 months, 10 months and a year later.

All the best,

Nils

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From: "D. Christopher Rogers" <branchiopod at gmail.com> on 2020.06.01 at 12:34:43(24343)
That is really cool!

I had U. donburnsii many years ago. It did quite well for me and bloomed regularly. It also divided for me several times, and I was able to give away many plants. One winter the heat went out in my greenhouse, and that was it.

I have used that method to propagate Amorphophallus, Sauromatum, Typhonium, Nephthytis, Arisaema, Gonatopus, Hapaline, Dracontium, and Ancomaenes.

Ancomaenes can also be easily grown from large broken off roots.

Happy days!

Christopher

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From: Nils Weessies <nilsweessies at gmail.com> on 2020.06.01 at 12:57:18(24345)
Christopher;

Agreed, but all the genera you mention so far are old world genera, while Ulearum is a new world genera. This is what makes its leaf propagation unique.

I did not know about it working on Nephthytis and Hapaline, do you just propagate it in the same manner?

All the best,

Nils

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From: "D. Christopher Rogers" <branchiopod at gmail.com> on 2020.06.01 at 13:04:29(24346)
Interesting point. I had tried that method on Dracontium a few times with no success. Now I want to try it on some other tuber forming New World taxa.

Yes, I basically used the same technique, but I think I started them in just water, moving them to sphagnum moss when the first root appeared. I may have used bottom heat, but I do not recall. Too many years ago!

Happy days,

Christopher

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