These southeastern plants occur mostly east of the Mississippi Rv. and south of the range of typical arguta (Semple et al. 2021; W). They differ from typical arguta in their hairy (strigillose) seeds and generally narrower leaves (FNA 20, W). Leaves remain largely glabrous (as in arguta), and both taxa are probably diploids (2n = 18). Some authors (including F and Cr) have confused these plants with S. bootii Hook.,which is a more distinct taxon centered in the Ozarks, with hairy leaves as well as seeds. The name S. yadkinensis (Porter) Small also appears to have been misapplied to some of these plants (Cr, W). True bootii is expected in w. Ky., since it does occur in the Shawnee Hills of s. Ill. and in the Western Highland Rim of w. Tenn. A possible immature coll. of bootii has come recently from TRIG (JC for APSC).