This largely Ozarkian species has been reported from Ky. by BA, but typical plants probably do not occur here. A few western colls., from CHRI, TODD and WARR (EKY, WKY), appear transitional from cuneatum to viride, but they may just be greenish-flowered plants of cuneatum (M, FNA 26). The broad earlier concept of T. viride (e.g. F) has become reduced to include only plants from e. Mo. and sw. Ill. BA also reported T. viridescens Nutt., which some authors have combined with viride, but others have separated as a more western taxon (FNA 26).