Mapping here is provisional. A. parlinii has sometimes been treated as an intergrading variety of plantaginifolia (Cr), with the most obvious difference being the glabrate or glabrous upper surface of its basal leaves (versus persistently tomentose). As a species, it has been reported from across eastern North America, but appears generally uncommon to absent on the Coastal Plain, or perhaps just not recognized in some states (K, W). A. parlinii reportedly consists of largely apomictic, non-staminate polyploid plants (2n = 56, 84, 70, 112), with various hybrid origins from the diploids (2n = 28) plantaginifolia, solitaria and racemosa Hook. (FNA 19). Schiling & Floden (2012) found no difference from plantaginifolia in the ITS region of its rDNA. Although several colls. from Ky. have been determined by authorities as parlinii (e.g., from FLEM and LEWI at NCU), few if any have the distinctly longer involucres (7-13 mm long versus 5-7 mm) that are described in manuals. Typical parlinii is also supposed to have longer staminate corollas (3.5-5 mm versus 2-3.5 mm) and pistillate corollas (4-7 mm versus 3-4 mm), and glandular upper stems. Several colls. (perhaps most) could be transferred to plantaginifolia var. ambigens; see notes under that name.