Tropaeolum brachyceras

David Ehrlich
Tue, 06 Apr 2010 16:17:59 PDT
  You bring up a very interesting point -- the chemicals (alkaloids?) presented in plants are valid criteria for classifying them.  For example, look at Allium.  And for that matter, Brassica and the Brassicaceae in general.  There are others -- I vaguely remember a case of two species that were indistinguishable except that they attracted non-overlapping pollinators.  And isn't Rhus separated from Toxicodendron by the presence or absence of urushiol?

  As I bake my own, whole wheat, and as I whip up my own, Mayo (though cream cheese sounds intriguing), and I usually add tomato.  Oh, any cress.

David E.

S.F. Peninsula, where it finally stopped raining.

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