Erocallis triphylla is a species of flowering plant in the family Montiaceae known by the common name threeleaf lewisia.

[1] It is native to western North America from British Columbia to California to Colorado.

[1] It grows in mountain and forest habitat, often in wet, rocky alpine areas where it may bloom through the snowmelt.

Instead of a basal rosette like many other Lewisia species it produces 2 to 5 short, slender, fleshy leaves from the lower part of the stem, which may be at or under the soil surface.

The flower has 5 to 9 small white or pinkish petals often marked with darker veining or stripes.