Navarretia sinistra (formerly Gilia sinistra) is a species of flowering plant in the phlox family known by the common name Alva Day's pincushionplant. It is native to the western United States, where it grows in forests and mountain chaparral habitat, often on volcanic or serpentine soils. It produces a branching, leafy stem coated in knobby glands. The leaves are sometimes deeply cut or lobed. The inflorescence produces generally 2 or 3 flowers on very thin stalks. Each flower has a pouchlike calyx of sepals which are ribbed with reddish membranous tissue between. The tubular flower has a pink corolla and a red-streaked yellow throat. The protruding stamens are tipped with blue anthers. It produces a branching, leafy stem coated in knobby glands. The leaves are sometimes deeply cut or lobed. The inflorescence produces generally 2 or 3 flowers on very thin stalks. Each flower has a pouchlike calyx of sepals which are ribbed with reddish membranous tissue between. The tubular flower has a pink corolla and a red-streaked yellow throat. The protruding stamens are tipped with blue anthers.