Pascopyrum

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Genus of grasses



Pascopyrum is a genus of grass in the family Poaceae, commonly known as the wheatgrasses. It is native to North America and is particularly prevalent in the Great Plains region. The genus is monotypic, containing only the species Pascopyrum smithii, commonly known as western wheatgrass.

Description[edit | edit source]

Pascopyrum smithii is a perennial grass that grows in dense clumps. It has a robust root system that allows it to thrive in a variety of soil types, including clay and sandy soils. The grass typically reaches heights of 30 to 100 cm. The leaves are blue-green and have a rough texture due to the presence of silica.

The inflorescence of Pascopyrum smithii is a spike, with each spikelet containing several florets. The flowering period occurs from late spring to early summer. The seeds are small and are dispersed by wind.

Habitat and Ecology[edit | edit source]

Pascopyrum smithii is well adapted to the temperate climates of the Great Plains. It is commonly found in prairies, grasslands, and open woodlands. The species is drought-tolerant and can survive in areas with low precipitation. It is also resistant to grazing, making it an important species for rangeland management.

The grass provides habitat and food for a variety of wildlife, including prairie dogs, bison, and numerous bird species. Its deep root system helps prevent soil erosion and contributes to soil health by improving water infiltration and nutrient cycling.

Uses[edit | edit source]

Pascopyrum smithii is valued for its role in agriculture and land reclamation. It is often used in pastures and rangelands due to its palatability and nutritional value for livestock. The grass is also used in revegetation projects to restore disturbed lands, such as those affected by mining or construction.

In addition to its ecological benefits, Pascopyrum smithii is sometimes used in landscaping for its aesthetic appeal and low maintenance requirements.

Cultivation[edit | edit source]

Pascopyrum smithii is relatively easy to cultivate. It can be propagated by seed or by division of the root clumps. The grass prefers full sun and well-drained soils but can tolerate a range of conditions. It is often included in seed mixes for prairie restoration and erosion control projects.

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Contributors: Prab R. Tumpati, MD