Corispermum hookeri var. hookeri
Inflorescences dense throughout, rarely interrupted, ovate, ovate-clavate. Fruits oblong-obovate or obovate.
Phenology: Flowering late summer–fall.
Habitat: Sandy and gravely shores of rivers and streams, sand dunes, waste places
Elevation: 0-100 m
Alta., Man., N.W.T., Ont., Sask.
Specimens closely approaching var. hookeri, but with smaller fruits, i.e., transitional toward Corispermum villosum, are known from Montana and North Dakota. Specimens from Ontario were probably introduced from the prairie region.
"broadest" is not a number.