This distinct southern taxon (recently elevated to species status) is poorly known in northern sections of its range, but it does extend north on the Gulf Coastal Plain to se Mo. (FNA 20; Y) and w Ky. In Ky. zedia is known only from ?CALL (MU), ?HICK (EK), LYON (APSC) and TRIG (APSC), especially at Land-Between-the-Lakes. It is locally common on lower slopes and stream terraces, generally on damper sites than typical caesia. For example, such plants are scattered along the trail around Hematite Lake in TRIG, much browsed by deer and easily overlooked. S. zedia is distinguished by its generally shorter leaves, with broader shape: lower mid-cauline leaves are 5-9 x 1.2-2.4 cm (versus 5-15 x 0.8-3 cm). Its stems are less strongly arching into the inflorescence, and may be somewhat flexuous from node to node ("zig-zag"). These characters suggest an intermediate condition between caesia and flexicaulis. Some colls. from Ky. and Tenn. also have unusually dense hairs on lower leaf surfaces, suggesting similarity to S. flaccidifolia (D. Estes, pers. comm.).