Musa corms

Peter Taggart
Mon, 04 Jun 2012 04:39:33 PDT
What about the modified leaves - "annular rings" on a corm?
 I understand a corm to be a stem surrounded by rings of modified leaves,
split a Crocosmia and it is very clear. The central stem (miristem?) with a
top shoot, possible side shoots (both root and stem) and roots at the
bottom of the stem. a new corm is normally formed on top of the old corm,
(which may wither OR NOT), each growing cycle.

A bulb has a basal plate on which the modified leaves sit (scales),
(tulips often have only one I think), onions or daffodils are better
I was taught that a tuber is a swollen root and that a rhizome is a swollen
stem. There are also such structures as "tuberous roots" though I am not
sure if this is a technical term. Neither roots nor tubers are surrounded
by leaves but a rhizome is a swollen stem with an extending shoot at the
tip which grows leaves and produces roots as it extends. I believe there
are rather more types of tuber but I understand that they too do not have
their bulk consisting of some type of leaf tissue. Both tubers and stems
have internal structure made up of cell tissue apropriately arranged.

I understand a stool to be a stump from which shoots may appear, sometimes
used for propagating, or else to coppice larger plants, I was not aware
that a stool was an anatomical structure.
Peter (UK)

On Mon, Jun 4, 2012 at 1:59 AM, Hannon <> wrote:

> Peter,
> The term "corm" is inconsistently defined by various sources, including a
> number of botanical dictionaries. The better definition, in my view, is one
> that can be usefully confined to bulb-like stems comprised of several nodes
> and internodes that are *completely exhausted and renewed each season*.
> Examples include Crocus, Gladiolus, Amorphophallus (not quite all), and
> many South African irids. "Bulb" can also be closely defined, which usually
> leaves "tuber" as the catch-all category for other geophytes.
> Calling a banana rhizome a "corm" is like calling a palm trunk a "caudex",
> which is an older use of a word now applied to very different structures.
> On 3 June 2012 16:00, Steven <> wrote:
> > I have been told by commercial banana growers that bananas are a corm &
> > the plant is actually a stool...
> >
> > On 04/06/2012, at 1:38 AM, Peter Taggart <> wrote:
> >
> >  I read on wikipedia that Musa havecorms, -stated with confidence.
> Perhaps
> > it is true?

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