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Flower spike

Yavapai County Native & Naturalized Plants

Penstemon thurberi - Thurber's penstemon

Synonyms: Penstemon thurberi var. anestius
Plant Form: Forb

Family: Scrophulariaceae

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

Origin: Native   Life Cycle: Perennial
General Desc: Weedy or brushy in appearance with weak stems that lie or grow on the ground with erect or rising tips.
Identification notes: Corolla blue-purple, funnel-shaped, few hairs at the flower orifice, throat with ridges, staminode (nonfunctional stamen) without hairs; leaves narrow, green or grayish, without teeth, having an abrupt tip.
Height: To 1-1/2 feet


Habitat Description: Sandy or rocky slopes, roadside in lower elevations, chaparral and woodlands.
Plant Communities: Interior Chaparral, Semidesert Grasslands, Pinyon Juniper Woodland, Disturbed Areas
Elevation: 2000 - 5000 feet

Flower Characteristics

Color: Pinkish or pale blue-purple     Shape: Irregular in elongated clusters     Tubular: Y     Flowering Period: Mar - Oct
Description: Five petals; 1/2 inch in size.

Leaf and Stem Characteristics

Leaf Color: Bright green     Leaf Type: Simple     Leaf Shape: Narrow     Leaf Margin: Smooth     Leaf Attachment: Opposite     Leaves Clasp: N
Hairs: No     Spines: Y
Leaf Description: Leaves narrow, linear in shape with edges rolled upward nearly into a tube. Many slender stems emerge from a woody base.

Fruit and Seed Characteristics

Fruit Type: Capsule

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