Stargrass is a perennial herb with a basal rosette of broad, grass-like leaves. From this base arises a central stalk. The top portion of the stalk bears an infloresence of many nearly sessile flowers. The flowers are white, with mostly fused petals from 7 to 10 millimeters long.

Stargrass is likely most obvious when in flower, but may also be identified when in fruit or even from its basal rosettes.

The combination of a basal rosette of flat, leathery leaves, and the central raceme of small white flowers are distinctive in New York.