Wind Cave National Park - Grasses Middle (U.S. National Park Service)

Grass Characteristics
(A) Annual	A plant that does not live more than 1 year.
(P)Perennial	A plant that can live for more than 2 years.
(W) Warm Season	A plant that grows in spring and summer, flowers in summer or fall.
(C) Cool Season	A plant that grows and flowers in spring and early summer, grows slowly or becomes dormant during the hot part of the summer, and may resume growth in the fall as the weather cools.
(S) Sod Grass	A grass that forms sod by means of rhizomes or stolons.
(B) Bunch Grass	A grass that takes on the characteristic shape of a bunch or tuft.
(N) Native	Grass that was part of the original vegetation of the area.
(I) Introduced	Grass not native to North America, intentionally or unintentionally brought in by humans.

Mid Grasses 1 to 3 feet tall (Average heights; individual plant size may vary with growing conditions.)	A	P	W	C	S	B	N	I
Agropyron caninum Slender wheatgrass (Jul-Aug)		*		*		*	*
Agropyron cristatum Crested wheatgrass (Jun-Jul)		*		*		*		*
Pascopyrum smithii Western Wheatgrass (Jun-Jul)		*		*	*		*
Agropyron spicatum Bluebunch wheatgrass (Jun-Jul)		*		*	*		*
Schizachyrium scoparium Little bluestem (Aug-Sep)		*	*			*	*
Bouteloua curtipendula Sideoats grama (Jul-Aug)		*	*			*	*
Bromus commutatus Hairy chess (May-Jun)	*			*	*			*
Bromus inermis Smooth bromegrass (May-Jun)		*		*	*			*
Danthonia spicata Poverty Grass (Jul-Aug)		*		*		*	*
Echinochloa crusgalli Barnyard grass (Jul-Sep)	*		*		*			*
Hordeum jubatum Foxtail barley (Jun-Jul)		*		*		*	*
Koeleria pyramidata Junegrass (Jun-Jul)		*		*		*	*
Muhlenbergia racemosa Marsh muhly (Aug-Sep)		*	*		*		*
Oryzopsis asperifolia Rough-leaved ricegrass (May-Jun)		*		*		*	*
Oryzopsis hymenoides Indian ricegrass (Jun-Jul)		*		*		*	*
Oryzopsis micrantha Little-seed ricegrass (Jun-Jul)		*		*		*	*
Phleum pratense Timothy (Jun-Jul)		*		*		*		*
Poa compressa Canada bluegrass (Jun-Jul)		*		*	*			*
Poa canbyi Canby's bluegrass (Jun-Jul)		*	*			*	*
Poa interior Inland bluegrass (Jun-Jul)		*		*		*	*
Poa pratensis Kentucky bluegrass (Jun-Jul)		*		*		*		*
Sitanion hystrix Squirreltail (Jun-Jul)		*		*		*	*
Stipa comata Needle-and-thread (May-Jul)		*		*		*	*
Stipa spartea Porcupine grass (May-Jun)		*		*		*	*
Stipa viridula Green needlegrass (Jul-Aug)		*		*		*	*

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