Kentucky Plant Atlas




Taxonomic distinction unclear    No county information
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Poaceae <Paniceae> Dichanthelium <Lanuginosa> [Panicum] commsonianum (P. columbianum var. com.)
Dichanthelium commonsianum (Ashe) Freckmann
ALI: no HAB: n/a, n/a, n/a, n/a ABU: n/a, n/a, 0
This has been reported widely across eastern states (Thomas 2015); it may occur in Ky., but it is similar to villosissimum and a critical revision of colls. is needed. It appears transitional from villosissimum to the more southeastern D. ovale (Ell.) Gould & C.A. Clark, which has longer spikelets and less long hairs on the foliage, and occurs largely on the Coastal Plain. FNA 25 indicated that commsonianum (as a subspecies of ovale) has a range similar to villosissimum, but verified colls. from Ky. have not been located. D. commsonianum may be closest to columbianum (Thomas 2015), differing in its larger spikelets (2.2-2.7 mm long versus 1.3-2.2 mm), shorter ligule (0.5-1.3 mm versus 0.9-1.5 mm), and longer first glume (0.9-1.8 mm versus 0.5-1 mm).