Annual or perennial herbs, often with triangular stems (culms), the pith usually present; leaves alternate, the blades simple, grasslike (linear with parallel venation), with a tubular sheath usually closed at the apex; flowers (florets) bisexual or unisexual, very small, in spikelets; fruit an achene or nutlet, often triangular or lenticular.
Seed Type:
Gymnosperm
Origin:
Native: native to North America. Non-native: not native to North America. Introduced Native: native to North America, but not Rowe Woods.
* Definitions based on the USDA terminology