Polygonatum roseum?

[Leena]

I have gotten this plant in a plant swap as Polygonatum roseum.
What is a difference with P.roseum and P.verticillatum roseum?
These are not very big plants (they grow in a bit too crowded place), maybe 30-40cm tall.

[Maggi Young]

What I know about these plants  may be written on the head of a small pin - but..... here are
some links that may be  useful -
 Aaron Floden's  thread - Polygonatum, A pictoral guide -
http://www.srgc.net/forum/index.php?topic=2033.0

Aaron's posts on  P. verticillatum  http://www.srgc.net/forum/index.php?topic=2033.msg50232#msg50232
 Aaron's  website :
https://sites.google.com/site/polygonatae/


The RHS  site states that Polygonatum verticillatum roseum is not a valid name.
 

[Leena]

Thank you Maggi, I should have known there already was an answer in here.
So, my plant is not P.roseum.
Here, Aaron writes that P.roseum should have glaucous green stems, and mine has reddish stems. Also there are more than one flower in my plant.

[Afloden]

The plant in the photo looks like it might be P. kansuense. This one would have scabrous stems and small segmented rhizomes with distinct nodes. Roseum is glaucous with angled stems that are not scabrous.

My most recent phylogenetic paper shows the problems with with the Himalayan verticillatum which is not verticillatum, but a group of morphologically similar, but distantly related species.

Aaron

[Leena]

Thank you! I will have to move it this spring (it is still under snow) to a better place, and I will check the roots then.

[Leena]

The plant in the photo looks like it might be P. kansuense. This one would have scabrous stems and small segmented rhizomes with distinct nodes. 

I dug my plant up and moved it to a better place. Here is a picture of it's rhizome. Does it look P.kansuense?

[Afloden]

The rhizome looks like P. roseum which can be a very vigorous spreading species with terete rhizomes. I have always found it difficult to cultivate because of the heat in my climate.

[Leena]

Thank you! 
After I had moved it I now found it still coming up in it's old place, part of the rhizome must have been broken and left behind.
It obviously likes that place, but it is almost under a small rhododendron and there are also bigger plants in front of it, so I planted the rhizome in the picture  in the front of the shade border, just a few meters from the old place. I hope it thrives there as well.