is a specific kind of: asterid dicot genus.

has as a member: Machaeranthera tanacetifolia, tahoka daisy, tansy leaf aster | Machaeranthera bigelovii, sticky aster | Machaeranthera tortifoloia, Mojave aster.

is a member of: aster family, Asteraceae, Compositae, family Asteraceae, family Compositae.