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Yavapai County Native & Naturalized Plants

Eriastrum eremicum - desert woollystar

Plant Form: Forb

Family: Polemoniaceae

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Leaves and flowers
Max Licher @
Max Licher @
Forb Plant Description

Origin: Native   Life Cycle: Annual   Similar Species: Eriastrum diffusum
General Desc: Annual herb with erect stems, somewhat woody and branching from the base. The plant is covered in woolly hairs. Flowers are single and borne in elongated clusters.
Identification notes: Flower generally bilateral and more than 1/2 inch long; flower lobes are about 1/4 inch long; stamens generally unequal.
Height: 1 foot


Habitat Description: Open areas in sandy or gravel soils, washes and dry sunny flood-plains, basaltic rocky hillsides.
Plant Communities: Desert Scrub, Interior Chaparral, Semidesert Grasslands, Pinyon Juniper Woodland
Elevation: 2000 - 5000 feet

Flower Characteristics

Color: Blue to light purple with yellow center     Shape: Irregular in elongated clusters     Tubular: Y     Flowering Period: Apr - Jun
Description: Yellowish buds open into five lobed flowers that are not quite radially symmetric, since the two upper lobes are closer together than the lower three. The corolla throat is bright yellow, while the lobes are bluish purple with dark purple stripes.

Leaf and Stem Characteristics

Leaf Color: Green     Leaf Type: Simple     Leaf Shape: Narrow     Leaf Margin: Smooth     Leaf Attachment: Alternate     Leaves Clasp: N
Hairs: Leaves and stems     Spines: N
Leaf Description: Leaves are pinnately lobed or simple; lobes are generally linear or lance-shaped. Stem is erect.

Fruit and Seed Characteristics

Fruit Type: Capsule

  Arizona Cooperative Extension
Yavapai County
840 Rodeo Dr #C
Prescott, AZ 86305
(928) 445-6590
Version 7.0  
Last Updated: May 10, 2017  
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