Re: black-stemmed Siberian?

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Hi,

 

I have the following listed as black (dark purple) stemmed, but I don't know if the "robusta" designation is correct for all.  I know that the list isn't complete.  The stems of most I. X robusta seem to be dark, and there are more.  There are probably a number of other taxa and cultivars as well.  I have a Louisiana that makes an almost black stem, but I don't know the name.

 

Dave

 

I. pseudacorus ‘Sea Krill’

I. × robusta ‘Dark Aura’ (= ‘Virginica de Luxe’)

I. × robusta ‘Gerald Darby’

I. × robusta ‘John Wood’