Position in a system
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Bikonta - bikonts |
| Corticata | |
| Archaeplastida | |
| kingdom | Plantae Haeckel - plants |
| divisio | Magnoliophyta Cronquist, Takht. & W.Zimm. - flowering plants |
| class | Rosopsida Batsch - eudicots |
| order | Asterales Lindley |
| family | Asteraceae Martinov |
| subfamily | Asteroideae Lindley |
| tribus | Astereae Cass. |
| genus | Symphyotrichum Nees - aster |
| subgenus | Symphyotrichum subgen. Symphyotrichum |
| section | Symphyotrichum sect. Occidentales (Rydberg) G. L. Nesom |
| species | Symphyotrichum lentum (Greene) G.L.Nesom - Suisun Marsh Aster |