Collinsia greenei is a species of flowering plant in the plantain family known by the common name Greene's blue-eyed Mary.

Its habitat includes chaparral and coniferous forest on serpentine soils.

Collinsia greenei is an annual herb producing a very glandular-hairy purple-tinted green stem up to about 30 centimeters tall.

The sepals are bluntly lobed and coated thickly in glandular hairs.

The flower is one to 1.5 centimeters long and royal purple in color, sometimes with a wash of white in the throat.