Not an accepted name (status: unknown). The accepted name is Muhlenbergia mexicana (L.) Trin., 1824.

Muhlenbergia mexicana var. filiformis (L.) Trin., 1824 4% complete

No common name

Gram. Unifl. Sesquifl.: 189 (1824)

There is no corrections for Muhlenbergia mexicana var. filiformis yet.