Cytogeography of the Solidago rugosa Mill. Complex (Asteraceae: Astereae) in Eastern North America

Chromosome numbers are reported here for the first time from 117 individuals of Solidago rugosa and S. fistulosa. Including 178 previously published reports two species plus latissimifolia, chromosome have been determined 295 269 locations. Only diploids (2n = 18) were found throughout range fistulosa on coastal plain in eastern U.S.A. (44 counts). Diploids northern portion tetraploids 36) hexaploids 54) central southern portions (nine counts total). much North America four five varieties (northern var. rugosa, sphagnophila; aspera celtidifolia). Tetraploids all these exclusively cronquistiana high Appalachian Mountains. Hexaploids sphagnophila at scattered One possible hexaploid was Allegheny The diversity ploidy levels independent size growing conditions among three subsect. Venosae.