Symphyotrichum ontarionis var. glabratum

(Semple) Brouillet & Bouchard

Phytologia 82: 138. 1997.

Endemic
Basionym: Aster ontarionis var. glabratus Semple in J. C. Semple et al., Asters Ontario ed. 2, 60. 1996
Treatment appears in FNA Volume 20. Treatment on page 519. Mentioned on page 469, 518.

Leaves: abaxial faces glabrous or glabrate. 2n = 32.


Phenology: Flowering Jul–Aug.
Habitat: Alluvial stream shores
Elevation: 10–200 m

Discussion

Variety glabratum reaches farther north in Ontario and Quebec than does var. ontarionis, as far as the Clay Belt and streams of the James Bay basin. It may be present in Minnesota and Wisconsin. It may be confused with Symphyotrichum tradescantii, which is mostly allopatric. It is distinguished from the latter by its more deeply lobed disc corollas.

Selected References

None.

Lower Taxa

None.
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Semple) Brouillet & Bouchard +
Aster ontarionis var. glabratus +
Ont. +, Que. +  and Mich. +
10–200 m +
Alluvial stream shores +
Flowering Jul–Aug. +
Aster sect. Heterastrum +  and Aster subg. Symphyotrichum +
Symphyotrichum ontarionis var. glabratum +
Symphyotrichum ontarionis +
variety +