Mapping is provisional. V. dentatum, broadly defined, includes a polyploid series of plants (2n = 36, 54, 72); circumscription and mapping of taxa in this complex needs refinement (Cr, Y, W). Most or perhaps all colls. of this group from Ky. are probably referable to deamii. V. dentatum sensu stricto occurs further east in mid-Atlantic and central Appalachian regions. In Ky. the dentatum group is known mostly from the Appalachian Cliff section and the Knobs or nearby hills, and it is rare in watersheds of the Green, lower Cumberland and lower Tennessee Rivers. The name deamii has been applied to reportedly octoploid plants (2n = 72) of east-central states from Pa. to Mo., mostly in the central to lower Ohio Valley; Sorrie (2012) has revived species status for these plants. These usually grow in seasonally damp riparian zones, flatwoods and thickets, but some colls. mapped here are from dry rocky woods. Morphological distinction from typical dentatum has been somewhat unclear (D, St, Cr, Y, W). It is reasonable to include the relatively smooth-leaved var. indianense (Rehd.) Fern. from Ill., Ind. and Ohio. Further research in Ky. is needed to determine the appropriate status of Ky. plants; most colls. in herbaria lack flowers or fruits, and more living collections are needed in arboreta. See also notes under molle and alabamense. V. deamii may be distinguished from typical dentatum by the presence of stipitate glands on inflorescence branches and usually on leaf bases, at least on upper surfaces along midvein and on petioles. Glands are generally sparse to absent in typical dentatum. Also, stipules are often present on vigorous shoots (versus consistently absent). Like dentatum, deamii tends to have relatively elongated, thin-textured leaves, which are sometimes only thinly pubescent below. In contrast, leaves tend to be more rounded, subcoriaceous and pubescent in carolinianum, venosum and scabrellum of more southeastern regions (B. Sorrie in W). Further investigation is needed, including chemistry (with diverse terpenoids) as well as morphology. V. deamii probably had much medicinal use before Virginian settlement, but there has been little recent research (Berman 1960). The unpleasant fetid smell from dried leaves of some Viburnum species, especially Section Odontotinus, remains somewhat mysterious.