Symphyotrichum nahanniense

Nahanni Aster

Symphyotrichum nahanniense (W.J. Cody) Semple is currently known from about six locations in Nahanni National Park Reserve in the southwestern corner of Northwest Territories in Canada. It is similar to Symphyotrichum boreale. It is found only on tufa deposits at hot springs. The species was included in a multivariate study by Owen et al. (2006). The species is diploid (2n=16). The assistance of Parks Canada during field work in NT in 2003 is gratefully acknowledged.

Symphyotrichum nahanniense range JCS

Owen, E., J. C. Semple and B. Baum. 2006. A multivariate morphometric analysis of the Symphyotrichum boreale - S. nahanniense - S. welshii complex (Asteraceae: Astereae). Can. J. Bot 84: 1282–1297.

Last revised 15 April 2025 by J.C. Semple

© 2025 J.C. Semple, including all photographs unless otherwise indicated

Symphyotrichum nahanniense Wildmint Hot Spring
Symphyotrichum nahanniensis dwarf S 11162 Steps Hotspring
Symphyotrichum nahanniensis S 11162 Steps Hotspring
Symphyotrichum nahanniensis S 11164 involucre

1-4. Symphyotrichum nahanniense, Nahanni NPR, Northwest Territories, Canada. 1. Large plants by Wildmint Hot Spring. 2-3. Small and "large" plants, Semple et al. 11162, Steps Hotspring. 4. Involucre and ray florets, Semple et al. 11164, Rabbitkettle Hotsprings, small mound.