This taxon was discovered by D in southern and central Ind. during 1914-17; its native range may also include s . Ill. and s. Ohio, but probably not Ky. (Campbell & Seymour 2013). However, after 2000 or so a selection of this plant became widely grown in North American and European horticulture, proving more reliable than sullivantii in droughty summers. Another recent selection or hybrid has been patented as "American Gold Rush" (Horvath 2017); it appears transitional to tenax. In Ky., deamii escapes locally in or near plantings, and it will probably become naturalized. Species status may be justified, but the taxon is close to chapmanii and sullivantii. It differs from those two species as follows (Campbell & Seymour 2013): Plants grayish-hairy (versus not so), the stems with dense fine retrorse hairs mostly 1-2 mm long (versus sparse to dense stiff, antrorse or retrorse hairs mostly 0.5-1 mm long); up to ca. 0.6-1 m tall (versus 0.3-0.8 m); larger basal leaves usually with ca. 10-15 cm petioles (versus 15-20 cm), broadly cuneate or occasionally subtruncate, 3-6 cm wide (versus broadly cuneate, truncate or subcordate, 4-9 cm wide), crenate to shallowly dentate (versus subentire to crenate); leaves about as wide at mid-stem as most basal leaves (versus reduced in width up the stem), mostly ovate-lanceolate in central third of blade (versus lanceolate to ovate to subrhombic), but often with broad subamplexicaul petiolar bases and long-acuminate apices (versus usually with more abrupt narrowing at bases and apices), shallowly to irregularly dentate (versus crenate to dentate); rays mostly 1.5-2.5 cm long (versus 2-3 cm); paleae whitish green to stramineous (versus stramineous to orange-brownish), usually with little blackening of midrib (versus with or without blackening). Based on personal observation, the relatively dense pubescence of deamii may lead to reduced mammalian herbivory, at least from rabbits.