Mexican feather grass
Mexican feathergrass is native to Texas, New Mexico, Mexico, and Argentina. Increasingly popular as an ornamental grass, it is potentially invasive in some areas.
Identification: This grass forms clumps 12-24" (30-60 cm) high and about 12" (30 cm) around. Feathery green flower clusters 6-12" (15-30 cm) tall mature to silvery tan in color. The individual flowers each have a long, thin awn 2-3" (5-7.6 cm) in length. Grass blades are 6-14" (15-35 cm) long, almost tubular, tightly rolled, making the blades appear very fine, only half a millimeter in diameter.
Nassella tenuissima on floridata.com
Nassella tenuissima at HEAR: the Hawaiian Ecosystems at Risk project
Nassella tenuissima at the Lady Bird Johnson Wildflower Center
Nassella tenuissima on Weed Watch, the Los Angelas Region Council for Watershed Health Invasive Plant Monitoring and Outreach Program
Nassella tenuissima at George and Audrey DeLange's Arizona wildflower site
Nassella tenuissima description by Thomas H. Kent, last updated 25 May 2020.