Fendler’s Threeawn

Aristida purpurea var. fendleriana, commonly known as Fendler’s Threeawn, is a perennial grass native to the arid and semi-arid regions of the western United States, particularly found in states such as New Mexico, Colorado, and Wyoming. This variety typically grows in open grasslands, rocky slopes, and disturbed areas, thriving in well-drained soils. Fendler’s Threeawn exhibits a growth habit characterized by a tufted form, reaching heights of approximately 30 to 90 centimeters. The grass has a distinctive appearance, with slender, erect stems that can be somewhat wiry.

The leaves of Fendler’s Threeawn are narrow and elongated, typically measuring between 10 to 30 centimeters in length. They are usually flat or slightly rolled, with a fine texture and a green to bluish-green coloration. The inflorescence is a loose panicle that can be up to 30 centimeters long, featuring long awns that give the flowers a distinctive threeawn appearance. The flowering period occurs in late spring to early summer, and the seeds are dispersed by wind, aided by the elongated awns that catch the breeze. This grass plays a significant ecological role as a forage species for grazing animals and contributes to soil stabilization in its native habitats.

Fendler’s Threeawn exhibits several adaptations to its environment, including drought tolerance and the ability to thrive in nutrient-poor soils. Its deep root system allows it to access moisture during dry periods, while its growth form helps minimize water loss. The grass is also adapted to withstand grazing pressure, making it a resilient component of the ecosystems it inhabits. While not widely utilized in human applications, it can be important for erosion control and as part of restoration efforts in its native range.