Corms & Tubers

[Martyn Denney]

Dear AEGers,

Now that we are allowed to go into detail, I would like to raise the
issue of Corms and Tubers.

There has been much discussion about treatment of 'corms', but it is
worth pointing out that the Arisaema does not have a corm, it has a
tuber (actually I believe, a stem tuber), similar to a Cyclamen.

A corm is a storeage organ which is the solid thickened base of a stem
and generally has a tunic like a Crocus.

A tuber is a starchy structure which has all the attributes of a swollen
stem. Arisaema tubers take different forms, and Pradhan identified six
shapes, one of which he described as rhizomatous (A. speciosum for
example.

This may seem pedantic, but I believe that on the whole, one treats
plants with corms differently toplants with tubers.
--
Martyn Denney
Farnborough, Hampshire, UK.