Brittonia 8: 280. 1957.
Rhizomes: internodes short, leaves crowded at rhizome apex. Leaf-blade variegate, cordate to orbiculate-cordate. Flowers: calyx-tube cylindric to cylindric-campanulate, sometimes with prominent transverse ridge just above middle, 6-13 × 4-7 mm, inner surface longitudinally ridged with low reticulations between ridges, lobes spreading, 4-7 × 4-7 mm, adaxially puberulent; stamen connective not extending beyond pollen-sacs; ovary 1/2-inferior; ovules 6 per locule; style notched at apex. 2n = 26.
Phenology: Flowering late winter–spring (Mar–Jun).
Habitat: Acidic sandy loam on bluffs and in ravines in deciduous forests, often associated with Kalmia latifolia
Elevation: 500-700 m
Of conservation concern.
The name Asarum naniflorum (H. L. Blomquist) Pfeifer has never been validly published.
"broad" is not a number.