Re: setosa, hookeri, tridentata, var. canandensis and var. arctica

My understanding is that tridentata does not geogrpahically overlap with 
any of the other species you mentioned.  The others have all been lumped 
together under setosa at one time or another.  Tridentata and setosa have 
always been separate from each other.

It's my personal opinion that tridentata is more closely allied with 
(related to) Louisiana irises rather than I. setosa.  This is based on 
geography, growth habit, cultural requirements, as well as seed morphology 
(I think 'morphology' is the right word).

Scientifically I can't adequately describe the differences between the 
flowers of setosa & tridentata... but I would never be able to confuse them 
when in bloom.  They are distinctly different!   There are some great 
photos on the SIGNA web database, http://www.badbear.com/signa

Dennis in Cincinnati



At 08:23 PM 2/25/2004 +0000, you wrote:
>setosa, hookeri, tridentata, var. canandensis and var. arctica
>
>Could someone shed some light on the current taxonomic view of these
>irises? For instance, I seem to remember something about I.
>tridentata once being considered a geographically isolated population
>of setosa? And that the northeastern North American population of
>setosa, used to be called I.setosa var. canadensis, but is now maybe
>considered separate enough to be called I. hookeri. Does the
>population of setosa form a continuum, (from Asia through western
>North America to eastern North America) which grades from one type
>into another? Or are there discrete blocks of the types? And what are
>the distinguishing features of the types? For example, how would you
>tell a tridentata from a hookeri from a setosa var arctica?
>
>I'm mostly wondering how varied the setosa clan is and how
>interfertile these various members are? And are they all 2n=38?
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>



 
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