[Arisaema-l] Arisaema root structure

[Peter Taggart]

Dear Peter,

Are you saying that no, Arisaemas are not corms? and do you agree that the
structure of a corm is a stem surrounded by modified leaves as well as a
corm tunic?

How do you define a rhizome? and a tuber?
Thankyou..
Peter (UK)



2012/4/24 Peter Boyce <phymatarum at googlemail.com>

> No, because it has no ‘tunic’. Think *Crocus* and *Gladiolus* for true
> corms. ****
>
> ** **
>
> Geophytic aroids with underground storage organs are never cormous. Most,
> regardless of the shape of the storage organ, are tubers. Rhizome has a
> very specific morphological application and there are none in *Arisaema*that I recall.
> *Amorphophallus* has two definite rhizomatous species, *A. rhizomatosus*and
> *A. hayi*.****
>
> ** **
>
>
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