Aster rigidus

Aster rigidus  may refer to four different species of plants:
 * Aster rigidus Soó, a synonym for Galatella sedifolia subsp. rigida (DC.) Greuter
 * Aster rigidus Kuntze, a synonym for Solidago rigida subsp. rigida L.
 * Aster rigidus Moench, a synonym for  Pentanema salicinum (L.) D.Gut.Larr. et al.
 * Aster rigidus L., a synonym for Ionactis linariifolia (L.) Greene