On 14 Dec 2009, at 11:13, J.E. Shields wrote: > I myself have a hard time distinguishing some tubers from corms. Just keep in mind that Mother Nature is none too fond of boffins' attempts to pigeonhole her children, so she makes sure there are gray areas around definitions such as those for tubers and corms. Many geophytes are straightforwardly categorized as bulb, tuber, corm, or rhizome, but you may be sure that there are intermediate, borderline, and non- conforming species. Lose no sleep over the matter. -- Rodger Whitlock Victoria, British Columbia, Canada Maritime Zone 8, a cool Mediterranean climate on beautiful Vancouver Island http://maps.google.ca/maps/…