Re: I. versicolor Help Needed

 

There are several distinguishing features. Anderson covered this thoroughly in his papers.

Just a few.
 Versicolor has flowers above foliage. Virginica below foliage.  The standards in versicolour are shorter in proportion to falls  then in virginica.

In regards to seed pod, basically correct. Versicolor has six rows of seeds. Two in each part of the seed capsule. virginica can have two rows in one of the three parts of the capsule, never in more then one , but most often just the one row in each segment of seed capsule.

You can access Anderson's articles here. 1928 for first article, and 1936 for second, more definite article.

http://www.biodiversitylibrary.org/bibliography/702#

Chuck Chapman




-----Original Message-----
From: Robert Pries <robertpries@embarqmail.com>
To: iris-species <iris-species@yahoogroups.com>
Sent: Fri, Oct 14, 2011 9:47 am
Subject: Re: [iris-species] I. versicolor Help Needed

 
Some time ago I was told second hand that Tony Huber had suggested an easy way of distinguishing Iris versicolor and Iris virginica was that one had six rows of seeds in cross section of the capsule and the other had 3 rows. in other words one has a double row of seeds in each locule. For years I keep meaning to check this out. can anyone help?
Unfortunately my memory does not recall which was supposed to have the double row. If this holds true I would love to have photos of cross sections of capsules to compare and place on the Encyclopedia. I just added the plate of Iris versicolor from Addisonia and a few months ago I had a long talk with the Director of The Missouri Botanical Garden Library about sharing information from the Library  for the Encyclopedia. Although I tried to link the reference to the Anderson article on the versicolor page I could not get it to work. For now only the reference is there.

From: "Victor" <v*@msn.com>
To: i*@yahoogroups.com
Sent: Friday, October 14, 2011 6:26:33 AM
Subject: RE: [iris-species]  I. versicolor

 
Sir R. A. Fisher developed the âF-test and distributionâ named after him.  He popularized and put on a firm mathematical basic the brewery-chemist Studentâs ât-test and distribution.â Fisher is the father of modern-day statistical analysis.  He put evolution on a firm mathematical basic.  Sir R. A. Fisher was a giant in science.
 
Vic
Victor W. Lambou
 
 
From: i*@yahoogroups.com [i*@yahoogroups.com?] On Behalf Of g*@peoplepc.com
Sent: Thursday, October 13, 2011 10:33 PM
To: i*@yahoogroups.com
Subject: Re: [iris-species] I. versicolor
 
 
Iris Species Group
I have followed the thread regarding Iris setosa / and potentially related species such as versicolor, with interest. For those interested in such things, here is a little bit of  additional perspective as I understand it.
 
The substantial connection of Species Iris with Edgar Anderson actually goes considerably further than Setosa. Anderson studied the origin of Lousiana Iris as well in developing his general population genetics and species origin theories. Now acclaimed as historically important work in plant science. One of his books "Introgressive Hybridization" involved extensive studies with the origin of Lousiana iris. Anderson and Fisher (another great scientist) were instrumental in literally developing the fledgling science of population genetics following establishment of Mendelian principles of genetic inheritance. R.A. Fisher, colleague and contemporary of Anderson, was one of the worlds great statisticians. Fisher shared an interest in population genetics with Anderson. It was Fisher who developed many statistical methods that permitted population genetics to be understood through mathematical modeling and statistical interpretation of massive amounts of plant data. Little wonder Anderson and Fisher were widely quoted in their day, as now. ( as Chuck noted ) These were two of the most influential plant geneticists of the last century - little celebrated in my opinion, but historically important none-the-less. It might be said that Anderson and Fisher were to population genetics what Watson and Crick later became to DNA when they discovered and described function of the universal code of life. In his quest Anderson used Iris species as model plants for his botanical investigations.
 
irisman646
gregdavis
 
 
 

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