Almutaster is a North American genus of plants in the family Asteraceae containing the single species Almutaster pauciflorus (formerly Aster pauciflorus), which is known by the common name alkali marsh aster.

It is native to Canada (Northwest Territories and the three Prairie Provinces), the Western United States, and northern and central Mexico (as far south as Tlaxcala).

This is a perennial herb growing a reddish-green glandular stem to heights from 30 to 120 centimeters.

The head is lined with phyllaries covered in tiny white resin glands.

[2] The inflorescences are a food source for adult Lepidoptera, although they may not be the principal pollinators.