hort.net Seasonal photo, (c) 2006 Christopher P. Lindsey, All Rights Reserved: do not copy
articles | gallery of plants | blog | tech blog | plant profiles | patents | mailing lists | top stories | links | shorturl service | tom clothier's archive0
Gallery of Plants
Tech Blog
Plant Profiles
Mailing Lists
    Search ALL lists
    Search help
    Subscription info
Top Stories
sHORTurl service
Tom Clothier's Archive
 Top Stories
New Trillium species discovered

Disease could hit Britain's trees hard

Ten of the best snowdrop cultivars

Plant protein database helps identify plant gene functions

Dendroclimatologists record history through trees

Potato beetle could be thwarted through gene manipulation

Hawaii expands coffee farm quarantine

Study explains flower petal loss

RSS story archive

Re: Iris setosa (response)

On Wed, 17 Dec 1997, Bill Shear wrote:

>  One of the things
> >that bothers me about the occurence of I hookeri (= setosa var
> >canadensis) on the east coast of N America is how did it get there
> >from the west coast? Did it originally occur on the entire north
> >coast of an earlier N American continent and spread down the east
> >coast to Maine and the Canadian maritime Provinces? I would really
> >like to know. Anybody have enough geology to offer clues?
> The standard idea is that I. setosa was widespread in both NE Asia and
> across North America at various times during the glacial period.  Glacial
> advance would have separated western and eastern populations, which then
> evolved enough differences to become separate species (Note that an animal
> taxonomist would not consider setosa and hookeri separate species if they
> could freely interbreed, but plant taxonomists use different criteria).  If
> the separation occurred during the last glacial maximum, then hookeri as a
> species may only be a few tens of thousands of years old.
OK relative to that idea, do you think that I setosa would exist in
west Greenland or inFrobisher Bay or down the east coast of Quebec
and Labrador or Newfoundland? 

> Where is I. tridentata in all this?  Supposedly it cannot be crossed with
> setosa or hookeri, but is included in the same series or subseries.  I have
> plants of this species in my garden but they are poor "doers" and have
> never bloomed. 
I know you should not answer a question with another one, but how
does this species grow a bit further north?
 It is found in N. Car., S. CAr., Ga. and Fla., separated by
> a definite gap from hookeri.  Did the Japanese botanists who studied the
> problem of hookeri include tridentata in their work?
> Bill Shear
> Department of Biology
> Hampden-Sydney College
> Hampden-Sydney VA 23943
> (804)223-6172
> FAX (804)223-6374
> email<bills@hsc.edu>

Diana Louis <dlouis@dynamicro.on.ca> <- private email address
Zone 4 Newmarket, Ontario, Canada 
AIS, CIS, SIGNA, IRIS-L, Canadian Wildflower Soc.

URL for the North American Native Irises web page

 © 1995-2017 Mallorn Computing, Inc.All Rights Reserved.
Our Privacy Statement
Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index