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  selloum any way you can
From: DBurch2345 at aol.com on 2000.07.30 at 22:35:54(5188)
Help, someone, please. The name Philodendron selloum is strongly entrenched
in the horticulture industry, but I am influenced by the fact that most of my
"authorities" see that name as a synonym of P. bipinnatifidum. I am about to
make this switch in the three or four availability lists that I can affect,
but on one last swing through the internet I find that the ISTA list of
stabilized names gives P. lundii Warm. as a synonym of P. bipinnatifidum
Schott. ex Endl. but lists P. selloum K. Koch as a "good" name.
O.K. my simple question (why is it that they never have simple answers?):
What is the correct name for the plant used in enormous quantities in Florida
landscaping? I know that there are odds and ends of hybrids out there, but
what is the best name to use for the one that "everyone" grows?

Derek Burch

From: Neil Crafter golfstra at senet.com.au> on 2000.07.31 at 21:28:32(5190)
Hi Derek
Philodendron selloum was reduced to synonomy under P. bipinnatifidum, by Dr Simon
Mayo in his revision of Philodendron subgenus Meconostigma, published in the Kew
Bulletin in the early 90's. Simon is the "guru" of this subgenus which comprises
the "tree trunk self headers" as they are commonly called. He also reduced a few
others to synonomy under this name including, if I recall, P.lundii and
P.mello-barretoanum. So this is the generally accepted revision and it would seem
that calling this plant P.selloum is not valid. But getting all the nurseries to
change - well, good luck!

As for your post on Philodendron "Xanadu", this has been well discussed before in
the list. Suggest you also check the list archives. It is an Australian
hybrid/sport/variety that is claimed to derive from P.bipinnatifidum, but has a
different flower, different foliage and is about one quarter the size! Julius
Boos had some info on this and I'm sure he'll care to comment further. Well

From: plantnut at macconnect.com (plantnut) on 2000.07.31 at 21:30:06(5192)
The 'Authority' on this is Dr. Simon Mayo... If he does not reply to your
message... you can buttonhole him in September at the IAS Meeting!!!!

From: "Julius Boos" ju-bo at email.msn.com> on 2000.08.02 at 08:15:59(5199)
Hello Neil, Donna and others!

The problem with the 'story' about P. Xanadu is that it`s inflorescences
(and all other structures!) bear NO resemblance to P. 'selloum', which has a
HUGE, all-green, pointed banana-like spathe, over 20" long, and produces
multiple inflorescences over a very long 'season', while P. Xanadu bears
three or four, generally less, small, 5-6", shiny PURPLE cigar-like
inflorescences all together at once over a very short period of time, and
just the top of the spathe opens around the cream, round tip of the spadix.
When I first saw the P. Xanadu in bloom, I started a discussion on this
List, and Scott Hyndman very kindly provided details from the patent
application (?) which said that the plant originated from a random seed of
P. selloum in the collection of an Australian hobbiest couple, the
Winterbourns. Letters to them from both Dr. Tom Croat and myself asking
for more details have gone un-answered so far. (maybe an Australian member
of this list may have sucess if he/she were to personally contact them??)
Dr. Croat and myself believe this to possibly be a true, 'good' species, and
I personally believe the story about P. 'selloum' to not be true, and
suspect that the seed may be of a good species sent to Australia from some
Latin American Country. THE way to test this would be to pollenate one P.
Xanadu bloom with another and obtain seed. When/IF these grew up, we would
be able to observe if any of these first generation plantlets diverged from
the growth habit of the parents, which would indicate that the parent plants
are hybrids. PLEASE someone, assist in this easy experiment!

Good growing,
and Cheers!


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