IAS Aroid Quasi Forum

About Aroid-L
 This is a continuously updated archive of the Aroid-L mailing list in a forum format - not an actual Forum. If you want to post, you will still need to register for the Aroid-L mailing list and send your postings by e-mail for moderation in the normal way.

  Tuber vs. Corm
From: Wilbert Hetterscheid <hetter at vkc.nl> on 1999.01.13 at 15:18:56(2890)
I suggest we file this discussion somewhere, so that it doesn't
resurface all the time. My two Euro-cents:

Bulb: this is a condensed stem or stem part, INCLUDING all appendages!
Therefore a bulb shows e.g. scales, which are modified leaves, used for
storage (Lilium!), or storage scales and some outer, thin, protective
scales (Iris, Crocus). Obviously no aroid exists (....I hope...) that
shows such a device. Quite often, bulbs also contain the new season's
growth in condensed form (inflorescence etc.).

Tuber: modified stem or stem part, for storage WITHOUT appendages (or
non-modified ones). So, in a bulb, the appendages form the main storage
facility, wheras in a tuber, the stem (-part) itself swells and performs
the storage function. Therefore a tuber has no thickened appendages but
may have thin scales protecting buds or whatever. A tuber may contain
more than one growth-module (e.g. some Anchomanes species) or just one

Note: this is a very old post, so no reply function is available.