See

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■(SIB) 'Nigrescens'

1875, Van Houtte

'Nigrescens' (Louis Benoît Van Houtte, 1875). Synonym: Sibirica nigrescens.

See below:

Photo scanned from the 1955 Rainbow Hybridizing Gardens catalog by Kate Brewitt
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References:

Awaiting original catalog description
 

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-- BobPries - 2011-03-07
I Attachment Action Size Date Who Comment
nigrescens1.JPGJPG nigrescens1.JPG manage 11 K 12 Apr 2020 - 01:36 TerryLaurin Photo scanned from the 1955 Rainbow Hybridizing Gardens catalog by Kate Brewitt
Topic revision: r5 - 20 May 2021, PascalJordan
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