Dean, M. L. & K. L. Chambers. 1983. Chromosome numbers and evolutionary patterns in the Aster occidentalis (Asteraceae) polyploid complex of western North America. Brittonia 35: 189–196.
Dean, M. L. & K. L. Chambers. 1983. Chromosome numbers and evolutionary patterns in the Aster occidentalis (Asteraceae) polyploid complex of western North America. Brittonia 35: 189–196.