Indian ricegrass | |
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Indian ricegrass growing in cryptobiotic crust at White Sands National Monument | |
Scientific classification | |
Kingdom: | Plantae |
(unranked): | Angiosperms |
(unranked): | Monocots |
(unranked): | Commelinids |
Order: | Poales |
Family: | Poaceae |
Genus: | Oryzopsis |
Species: | O. hymenoides |
Binomial name | |
Oryzopsis hymenoides Ricker ex Piper |
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Synonyms | |
Synonymy
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Oryzopsis hymenoides (Synonym: Stipa hymenoides, common names: Indian ricegrass and sand rice grass) is a perennial cool-seasonbunchgrass with very narrow, rolled leaf blades. It is native to western North America east of the Cascades from British Columbia and Alberta south to southern California, northeastern Mexico, and Texas. In the wild, it typically grows 4 to 24 in (10 to 61 cm) tall and 8 to 12 in (20 to 30 cm) wide.
O. hymenoides grows in a variety of habitats from desert scrub to ponderosa pine forests. It can live in soils from sand to clay, but it does particularly well in sand, where it is the dominant grass growing with sagebrush, and may occur almost unmixed with other plants. It helps stabilize shifting sand.
Indian ricegrass is an important food for livestock and for wild grazers such as bison, desert bighorn sheep, elk, mule deer, pronghorns, and jackrabbits. For some of these species, it is especially vital in late winter, as it produces green shoots earlier than other grasses. The seeds are heavily consumed by many rodents and birds, notably mourning doves.
This tough grass is known for its ability to reseed and establish itself on sites damaged by fire or overgrazing. Much germination occurs in years with wet Aprils. It is grown in xeriscapes—cultivars are available—and will become quite large if given sufficient space. The open, spangled appearance when in flower or fruit is very attractive, especially in backlight. The flower stalk is commonly used in dry flower arrangements.