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  Re: [Aroid-l] Thorns at anubiases
From: Peter Boyce <phymatarum at googlemail.com> on 2009.02.20 at 06:36:19(19127)
Dear Dmitry,

As I mentioned in my last email, we are really not all aware of what role
such prickles might play in the aroids. As Tom has also mentioned they occur
in Neotropical Homalomena too. The definition of a thorn is an indeterminate
structure (such as a stem or root) capable of lateral growth through
branching (and even of flowering and bearing leaves in some instances, that
have a protective role. Thorns are most commonly found in Rosaceae (e.g.,
Crataegus), Fabaceae (notably Gleditschia) and Rhamnaceae (many genera).

Very best

Peter

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