Erythronium umbilicatum subsp. umbilicatum
Stolons absent. 2n = 24.
Phenology: Flowering spring.
Habitat: Woods of flood plains and adjacent slopes along creeks, streams, small rivers
Elevation: 0–900 m
Ala., Fla., Ga., Ky., Md., N.C., S.C., Tenn., Va., W.Va.
Since subsp. umbilicatum does not produce stolons, most plants in a population produce flowers, and seedlings may be frequent. Although many Erythronium species have considerable variation in size at flowering, E. umbilicatum subsp. umbilicatum is especially variable in this regard.
"thicker" is not a number.