General: Big Galleta Grass (Pleuraphis rigida) is the common, large, upright grass that grows in individual clumps (bunches) in the deserts around Las Vegas. Big Galleta is a big bunchgrass that grows to about 3.5-feet tall and just as wide. Leaves are long and narrow. Stems grow erect with long (to 6 inches), open seedheads. The 0.5-inch-long spikelets radiate from the end of the spike. After the seeds disperse, the end of the stem (rachis) is bent in a zig-zag pattern, a characteristic unique to this species in our area.
Big Galleta Grass is a common component of vegetation associations in the Upper Sonoran (Mojave Desert Scrub) life zone. This species is particularly common around the entrance to the Scenic Loop Drive at Red Rocks NCA.
Family: Grass (Poaceae).
Other Names: Hilaria rigida. |