John C. Semple    WAT                          

COURSES

RESEARCH

Asters 

Goldenasters 

Goldenrods 

RECENT PUBLICATIONS 

HOME

  Symphyotrichum subg. Chapmaniani 

  Chapman's Aster 

Symphyotrichum subg. Chapmaniani (Semple) Semple includes a single species S. chapmanii (Torr. & Gray) Semple and Brouillet (Semple et al. 2002).  First describe as Aster chapmanii, the species was treated as Helastrum chapmanii by Shinners (1969) and then as Eurybia chapmanii by Nesom (1994).  Brouillet et al. (2001) determined that it belong within Symphyotrichum based on DNA sequence data.  The species is basal within the genus but has a derived chromosome number of 2n = 14.  It's cormoid rootstock was thought to indicate a relationship with the Heleastrum asters (Eurybia sect. Heleastrum) but this is not the case.

Last update 26 October 2005 by J.C. Semple     © 2005, J.C. Semple