Gentianaceae, Gentianales. Amarella: Lat, somewhat bitter (amarus).
Family to genus in the Black Hills or CO: infl a cyme or compound cyme (flowers not solitary); corolla with conspicuous connate tube, not salverform, without folded plaits in sinuses, lobes entire.
Only species in genus in the Black Hills.
Orobanchaceae, Lamiales.
Genus to species in N. America: cauline lvs alternate; calyx lobes 2 (not 5); galea beak sickle-shaped (not straight).
Species to subsp in N. America (both subsp grow in N. America): corolla tube white (not light pink).