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I have some chamaecyparis nomenclature questions

Posted by mrgpag swOH-Z5/6 (My Page) on
Mon, Aug 29, 11 at 16:02

I volunteer at a local arboretum and have been asked to go through our collections database and look for errors, conflicting information and the like. In doing so I have questions about chamaecyparis cultivar 'Sullivan'.

When new plants arrive, the names are added into the database as received. Dirr's manual on woody plants has been the source for info pertaining to nomenclatures and authority, but he is incomplete and not accurate in many cases. And Dirr does not provide much if any cultivar info on chamaecyparis.

In 1997 we received a number plants labeled chamaecyparis nookatensis 'Sullivan' and in 2004 we received plants labeled chamaecyparis lawsoniana 'Sullivan'. Both accessions resemble each other in physical appearance.

So was c.nookatenis 'Sullivan' changed at some point to be c. lawsoniana 'Sullivan' or is there still a Sullivan cultivar for both species.

I appreciate any discussion along with any authority that was responsible for the changes.

Also, does anyone know if the 2011 International Botanical Congress changed the name of Callitropsis to Xanthocyparis?

Thanks Marshall


Follow-Up Postings:

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RE: I have some chamaecyparis nomenclature questions

I don't know about 'Sullivan' but I thought DNA testing had the powers that be settling on Cupressus nootkatensis, but I did not hear the official word.

tj


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RE: I have some chamaecyparis nomenclature questions

Hi Marshall, Chamaecyparis nootkatensis was renamed in Xanthocyparis nootkatensis.
By some it should be Cupressus nootkatensis or Callitropsis.
For me it's still Xanthocyparis nootkatensis but I think it will take a couple of years before I'll rename it into Cupressus nootkatensis.
For mew as a nurseryman all this renaming is a very big confusion...

The 'Sullivan' is a Chamaecyparis lawsoniana cultivar because of it's typical lawsoniana foliage and cones...

Here is a link that might be useful: 'Sullivan' pics


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RE: I have some chamaecyparis nomenclature questions

Can you post some photos of the plant? Include cones if it has any. That'll help determine what species your specimen is (in case it isn't correctly labelled).

Yep, Cupressus nootkatensis for Nootka Cypress. See e.g. here (pdf file; scroll down to Cupressus [# 11.24.] and note synonymy includes Xanthocyparis).

Resin


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RE: I have some chamaecyparis nomenclature questions

My question remains - is there a "whatever" nootkatensis 'Sullivan'? I'll be more concerned about the proper genus when that question is answered. Pictures may be available but not for several days.
Marshall


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RE: I have some chamaecyparis nomenclature questions

Marshall, there's no 'Sullivan' cultivar for both species, it's a Chamaecyparis lawsoniana for sure.
I received my plant under Chamaecyparis nootkatensis but I saw immediatly that it was a Chamaecyparis lawsoniana...
These are some pics of the one I received.
Photobucket

Photobucket

Photobucket


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RE: I have some chamaecyparis nomenclature questions

"My question remains - is there a "whatever" nootkatensis 'Sullivan'? I'll be more concerned about the proper genus when that question is answered"

There's no Nootka cultivar 'Sullivan'. But what we can't know without pics, is whether you have a plant of Chamaecyparis lawsoniana 'Sullivan', or a plant of Cupressus nootkatensis mis-labelled as 'Sullivan'.

Resin


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RE: I have some chamaecyparis nomenclature questions

That's right, pictures please!
(but I think I know the answer :0) )


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RE: I have some chamaecyparis nomenclature questions

Thanks - that answers one question. I'll post some pictures in a day or two to try and determine what we really have.
Marshall


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RE: I have some chamaecyparis nomenclature questions

14 of 15 laws .. tiny bargain plants from stanley.. way back when.. all died in my z5 ... alum being the only exception ...

depending on your micro climate.. you should be able to tell if it is a law.. after the first z5 winter.. lol ...

ken


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RE: I have some chamaecyparis nomenclature questions

OK, here's some images - Whatcha think?
Sullivan
Sullivan Foliage

Sullivan Cones


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RE: I have some chamaecyparis nomenclature questions

Chamaecyparis lawsoniana 'Sullivan' :0)
Typical foliage and cones for this species.


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RE: I have some chamaecyparis nomenclature questions

Thanks - that's what I thought as well but needed some confirmation.
Marshall


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RE: I have some chamaecyparis nomenclature questions

is it some secret which local arb???

ken


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RE: I have some chamaecyparis nomenclature questions

Ken there is a row of them growing at Hidden Lake close to the parking area.

Frank


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