Hilaria rigida (formerly Pleuraphis rigida) is a species of clumping perennial grass that is widespread in California deserts. It is commonly known as big galleta. It is a monocot in the Hilaria genus of the grass family (Poaceae).

It can be recognized after seed dispersal by the wiry, wavy inflorescence stalks (flexuose) that continue to stick out of the clump of leaf blades. The stems are unusual among grasses in that they are solid, even between the nodes, whereas most grasses have hollow stems.

The clumps help stabilize sand dunes. According to botanist Philip A. Munz, "it is said to be one of the most valuable forage grasses of the desert". Clumps can live more than 100 years.

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