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  Helicodiceros-horizontal vs. vertical
From: "Julius Boos" <ju-bo at msn.com> on 2007.02.03 at 14:44:15(15214)
Reply-To : Discussion of aroids
Sent : Saturday, February 3, 2007 12:18 AM
To : "Discussion of aroids"
Subject : RE: [Aroid-l] Helicodiceros potting

Hello Friends,

Like Christopher and Dr. Waddick (below) I did not give the question enough
thought or consideration, and they are correct about some 'tubers' (= corms,
rhizomes, etc.) of some aroids growing horizontally.
In some genera (Xanthosoma and Chlorospatha come readily to mind), the
rhizomes do grow horizontally, enlarging and growing along or just under
the surface of the soil, but with the apical tip and leaves growing erect at
the end of the rhizome. I suppose that other underground growers such as
Arum and Helicodiceros may do the same, but produce elongated tubers/corms
which oriente themselves in a horizontal position but underground, and in
the case of Helicodiceros, which may grow in the cracks between rocks, this
orientation may be in any direction depending on the way the crack in the
rocks is oriented!

I hope these thoughts help.


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