Chelone obliqua var. speciosa
Bartonia 10: 19, plate 2, fig. 1. 1929.
Leaves: midcauline blade (69–) 88–170 mm. Flowers: caly× lobe margins densely ciliate; corolla: abaxial lobes 10–16 mm; staminode 4–8 (–12) mm. 2n = 84.
Phenology: Flowering Jul–Oct.
Habitat: Along streams, marshes, swamps, seeps, springs, wet meadows and woods, pond and lake margins.
Elevation: 90–200 m.
Ark., Ill., Ind., Iowa, Ky., Mich., Minn., Mo.
Variety speciosa occurs in the Interior Low and Ozark plateaus as well as Central Lowland provinces, where it is vulnerable to extinction. NatureServe (www.natureserve.org/explorer) estimates 21 to 80 populations of var. speciosa throughout its range and cites activities affecting wetland hydrology as threats to these populations.