Eriastrum

Eriastrum is a genus of flowering plants in the family Polemoniaceae, commonly known as woolly stars. These plants are native to western North America, primarily found in California and surrounding states.

Eriastrum species are typically annual herbs, although some may be short-lived perennials. They are characterized by their narrow, often needle-like leaves and dense clusters of flowers. The flowers are often blue or purple, but can also be white or yellow. The petals are fused at the base, forming a tube, and the stamens and pistil are often prominently displayed. The name Eriastrum refers to the woolly hairs that are often present on the leaves and stems of these plants ("erion" meaning wool and "astrum" meaning star).

Several species are adapted to dry, open habitats, and are often found in chaparral, grasslands, and rocky slopes. They contribute to the biodiversity of these ecosystems and provide a source of nectar for pollinators such as bees and butterflies.

Taxonomic classification of Eriastrum has been revised in the past, with some species formerly classified within Gilia. Current classifications, based on molecular and morphological evidence, generally support the recognition of Eriastrum as a distinct genus. More in-depth botanical keys and field guides are recommended for accurate species identification.