This taxon in the jacea/nigra complex has often been confused with typical jacea, and it may be more common in some regions. C. nigrescens is widespread across western and northern states but it appears to be a relatively recent invader in southeastern states (FNA 19, W). In Ky. it was first collected by H. Woodward (APSC) in 1982 and then by J.W. Thieret (KNK) in 1989. I