Ipheion, Tristagma, Nothoscordum again

Mary Sue Ittner msittner@mcn.org
Wed, 23 Feb 2005 13:32:20 PST
Dear All,

I hate to bring this up again, but the recent addition of a Tristagma wiki 
page and picture makes me want some clarification so I can address it on 
the wiki. I've looked through some of our messages on this subject in the 
past. It becomes a real challenge to be talking about the same thing when 
some of these plants have gone through so many name changes. Our last 
discussion about Ipheion 'Rolf Fiedler' generated some strong words I think 
and shortly thereafter one of the participants in the discussion left our 
list. I don't think Alberto Castillo and Germán Roitman offered an opinion 
then and I hope they will this time.

I'll summarize some statements from the past. There is a real question 
about Tristagma peregrinans, a plant named by Ravenna that Alberto told us 
was never found by anyone else. One correspondent in November 2003 said 
that Ipheion 'Rolf Fielder' was this plant and that as of 1963 Ipheion had 
been included in Tristagma. Obviously not every one agrees since Ipheion is 
still very commonly being used. Mark M. pointed out that Traub who was the 
one responsible for this change was a consummate splitter. Alberto told us 
'Rolf Fielder' was a new species, but apparently not this one.

David Victor quoted Brian Mathew who traced Ipheion vittatum's move from 
Milla to Brodiaea to  Beauverdia to Ipheion to Tristagma and into 
Nothoscordum. He was leaving it in Ipheion because of an account he had 
received from Dr Rosa Guaglianone, an Argentinian botanist, who felt that 
it should stay there. Mark M. who specializes in this family feels 
comfortable with the yellow species being considered Nothoscordum.

For our wiki Tristagma page I'd like some understanding of whether this 
genus has species people recognize that are not considered Ipheion by 
others or are all of the species in this genus ones that were previously 
(and still by some) considered Ipheion.

I looked up the species Osmani added to the wiki with Arnold's help.
nomenclatural synonym:
This appears to be the original name:
Alliaceae/liliaceae Triteleia bivalvis Lindl.

Liliaceae Ipheion bivalve ( Lindl. ) Traub
in Plant Life, ix. 69 (1953).

Alliaceae Tristagma bivalve ( Lindl. ) Traub
Pl. Life 19: 61. 1963

If there are some species that those of you in South American consider 
Ipheion and some Tristagma can you tell me what is the difference that 
defines this? Is Tristagma bivalve the name most of you use now?

Thanks for help on this.

Mary Sue

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