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  Odd behavior on Colocasia.
From: pugturd at alltel.net (Brian Williams) on 2008.08.11 at 03:17:26(18363)
I have what I believe is a hybrid Colocasia used as a food crop growing
in my display. I got the plant several years ago and it has just
recently started behaving oddly by putting out new leaves and as the
old leaves grow a knot forms at the upper portion of the petiole and a
new leaf emerges out. I am guessing that this leaf and petiole is acting
similar to a runner. So far it has not formed new plants from these
growths but it is untelling as some are fairly new. Has anyone seen this
before? I have been growing a lot of these and this is a first. At the
moment the plant has 3 of these forming.

Here are the photos of the plant in question.

http://flickr.com/photos/briansbotanicals/

From: gartenbaureisenberger at web.de (Helmut Reisenberger) on 2008.08.12 at 09:37:15(18369)
Hi,

I have grown Colocasia gigantea as annuals, planted out in temperate climate. As they are strong growers under optimal conditions in our summer, they showed similar behaviours. After investigating the petioles, I found out that some of the extensively produced rhizoms went caught in the petioles. As soon the leaf finally goes, the new offset survives as soon the knot is touching ground and new roots are formed.
A similar behaving I found with climbing Philodendrons and Monsteras, where it frequently happened that aerial roots developed in the shelter of petioles.

Best regards
Helmut Reisenberger

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