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Evolution of Rhizomes, Bulbs?

  • To: Multiple recipients of list <iris-l@rt66.com>
  • Subject: Evolution of Rhizomes, Bulbs?
  • From: Gerry Snyder <gcsnyd@loop.com>
  • Date: Mon, 8 Dec 1997 18:09:10 -0700 (MST)

Iris can be either rhizomatous or bulbous. Which is the more primitive?

It would fit my picture of how things should be if, say, iris descended 
from bulbous ancestors and some (most) decided that rhizomes were better 
and switched. But then rhizomes would be restricted to iris, which they 
are not.

Or are different rhizomatous plants the result of convergent evolution?

Or is the above true with bulbs and rhizomes switched?

All answers, whether based on theory or knowledge, will be appreciated.

-Gerry, who had the heat on in his car on the way home from work for the first
time today
gcsnyd@loop.com    AIS Region 15
Warm, winterless Los Angeles
President of San Fernando Valley Iris Society
My work?  Helping generate data for http://www.jpl.nasa.gov/galileo

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