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AGAVE AND YUCCA | CACTI | WILDFLOWERS

Penstemon Gracilentus, Slender Penstemon


Plants > Wildflowers > Plantaginaceae > Penstemon Gracilentus
Slender Penstemon; Penstemon gracilentus along the Cluster Lakes Trail, Lassen Volcanic National Park, California
Penstemon gracilentus along the Cluster Lakes Trail, Lassen Volcanic National Park, California
Common names:
Slender penstemon, slender beardtongue
Family:
Plantain (Plantaginaceae)
Scientific name:
Penstemon gracilentus
Main flower color:
Purple
Range:
North California, south Oregon and northwest Nevada
Height:
Up to 2 feet
Habitat:
Woodland, sagebrush; up to 9,000 feet
Leaves:
Narrowly lanceolate or oblanceolate to linear, up to 4 inches long, with entire edges
Season:
June to August
Pintrest
Distinguishing features of penstemon gracilentus include the hairy staminode (infertile stamen), the hairless and unlobed leaves, and the lower lip of the corolla, which is not curved backwards. Stems are also hairless, and become woody with age. Leaves are concentrated along the stems rather than at the base, in opposite pairs.

Unlike the stems and leaves, the flowers and their stalks are glandular, covered by short sticky, hairs. Flowers consist of a short, purplish-green calyx, opening to five lance-shaped lobes, and a tubular, blue-purple corolla, a little less than one inch long. Corolla lobes are much shorter than the tube, and all open by about the same amount, less than 90 degrees. The staminode has a covering of yellow hairs.




Open cluster
Open cluster
Slender Penstemon
Linear leaves
Three purple flowers
Three purple flowers
Withering flowers
Withering flowers
Basal leaves
Basal leaves
Calyces and fruit
Calyces and fruit
Tall, thin stems
Tall, thin stems
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