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

HYB: 301 -- Computerized Taxonomy

This is a bit more advanced than
the other topics we've been discussing,
But I assure you that it's meant for the =

Non-Taxonomists among you....

Many classification systems have
been used over the years. The best way
to understand them is "contrast & =

compare".  Quite a chore decades ago.
I once covered a large double-blackboard
with index cards and magnets, just =

trying to trace the major divisions from =

Baker through Dykes to Lawrence.

Today's computer power makes it =

much easier.  It's an iterative process.
Understanding the general systems =

makes it easier to understand the =

individual species and understanding =

the relationships among the individual
species makes it easier to see the
relationships among the various systems.

I'm just going to provide some tools. =

Your assignment will be to apply them
to those species you're most interested in.

First, learn the general hierarchy:


Notice that "Variety" does not have
the same meaning it's had in common
use.  That's why we say that shows
are now staged by "cultivars" rather
than "varieties".

If you're interested in a single species,
you can set up a very simple spreadsheet.

1.   List the hierarchical terms down the
lefthand side.

2.   List the authorities across the top.

3.   Fill in the blanks.

To start with a very easy one, let's take =

a look at  I. mesopotamica:

It was not known in Baker's time.

Dykes classified it as
  Genus Iris =

     Subgenus Iris
        Section Pogoniris
He used the term "group" rather than
subsection and described the groups
rather than naming them.  So his
I. mesopotamica was simply one of =

the "Pogoniris of Syria and Asia Minor".

Lawrence classified it as:
  Genus Iris
      Subgenus Iris
         Section Pogiris
             Subsection Pogoniris
                  Series Elatae  =

Rodionenko classified it as:
  Genus Iris
      Subgenus Iris
          Section Iris

Werckmeister classified it as:
  Genus Iris
      Subgenus Iris
          Section Pogon         =

And Mathew as
  Genus Iris
      Subgenus Iris
          Section Iris

I hope this one seems so simple
and straightforward that you're =

wondering why I've bothered with

Sharon McAllister
73372.1745@compuserve.com  =

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