• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

Grasses - Middle

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)

*

*

*

*

Did You Know?

Natural Entrance of Wind Cave

Winds caused by changes in barometric pressure are what give Wind Cave its name. These winds have been measured at the cave's walk-in entrance at over 70 mph. The winds at the natural entrance of the cave attracted the attention of Native Americans and early settlers.