[The Prairie Stars of the Columbia River Gorge of Oregon and Washington]

Bulbiferous Prairie-star, Bulblet Prairie Star, Bulbous Woodland-star, Smooth Prairie Star

Lithophragma glabrum

Synonyms: Lithophragma bulbifera, Lithophragma bulbiferum, Lithophragma glabra, Lithophragma glabrum var. bulbiferum, Lithophragma glabrum var. ramulosum, Lithophragma tenellum var. floridum, Tellima bulbifera, Tellima glabra

Flower of Smooth Prairie Star: Lithophragma glabrum (Synonym: Lithophragma bulbifera, Lithophragma bulbiferum, Lithophragma glabra, Lithophragma glabrum var. bulbiferum, Lithophragma glabrum var. ramulosum, Lithophragma tenellum var. floridum, Tellima bulbifera, Tellima glabra)

The photo above shows a close-up of the narrow, deeply cleft petals of smooth prairie star as seen from along The Dalles Mt. Road to the northeast of The Dalles, Oregon.........March 17, 2007.

Smooth Prairie Star: Lithophragma glabrum (Synonym: Lithophragma bulbifera, Lithophragma bulbiferum, Lithophragma glabra, Lithophragma glabrum var. bulbiferum, Lithophragma glabrum var. ramulosum, Lithophragma tenellum var. floridum, Tellima bulbifera, Tellima glabra) Smooth prairie stars from scablands about 5 miles NW of The Dalles, OR....March 2, 1997.
Characteristics:

The USDA PLANTS Database currently has the species name spelled Lithophrgma glabrum. In addition, it has bulblet prairie star grouped as a part of this species.

Smooth prairie star is an attractive perennial with stems arising 5-25 cm from a cluster of small basal leaves. The stems and inflorescence are often purple-tinged in color, and the herbage is sparsely to thickly glandular-hairy throughout. The basal leaves are cleft to the base into 5 cuneate segments which are individually lobed. The basal leaves are smooth-surfaced to very lightly haired. With petioles, the basal leaves are from 1-2.5 cm long with blades from 1-2 cm wide. The 2-5 stem leaves are similar to the basal leaves, but reduced in size. They may bear several small reddish-purple bulblets within their axils. The bulblets may also be found within the inflorescence.

The inflorescence is usually a corymb or cluster of 2-5 flowers grouped closely near the tip of the stem (See photo of unopened flowers at right.). The flowers bear 5 white to pinkish-tinged petals, the blades cuneate-obovate, usually less than 8 mm long. The petals are 3-5 cleft, with each division further divided, often deeply, giving the petals a tattered look (See the photo atop of this page.). The calyx is cup-like, or broadly rounded at the base, and from 2.5-3.5 mm long in flower.


Habitat:

Smooth prairie star may be found on open, grassy and sagebrush slopes and in open ponderosa pine and oak woodlands.


Range:

Smooth prairie star may be found from Chelan and Kittitas Counties, Washington south along the eastern side of the Cascades to the Columbia River. Gorge, and hence south to south-central Oregon. It may be found eastward to northern Idaho, northwestern Montana, southeastern Washington, and northeastern Oregon.

In the Columbia River Gorge, it may be found between 100'-3000' on rocky outcrops near Crown Point east to near Horsethief Butte.


Calyx of Smooth Prairie Star: Lithophragma glabrum (Synonym: Lithophragma bulbifera, Lithophragma bulbiferum, Lithophragma glabra, Lithophragma glabrum var. bulbiferum, Lithophragma glabrum var. ramulosum, Lithophragma tenellum var. floridum, Tellima bulbifera, Tellima glabra)

The photo above shows the cup-shaped calyx of smooth prairie star. The calyx of the similar small-flowered prairie star tapers much more gradually than that of the smooth prairie star. Photographed along the Dalles Mt. Road to the northeast of The Dalles, OR..........March 17, 2007.

Bulbiferous Prairie-star, Bulblet Prairie Star, Bulbous Woodland-star, Smooth Prairie Star: Lithophragma glabrum (Synonym: Lithophragma bulbifera, Lithophragma bulbiferum, Lithophragma glabra, Lithophragma glabrum var. bulbiferum, Lithophragma glabrum var. ramulosum, Lithophragma tenellum var. floridum, Tellima bulbifera, Tellima glabra)

Smooth prairie star blooming along the Cherry Orchard Trail in the Columbia River Gorge..........March 7, 2011.

Bulbiferous Prairie-star, Bulblet Prairie Star, Bulbous Woodland-star, Smooth Prairie Star: Lithophragma glabrum (Synonym: Lithophragma bulbifera, Lithophragma bulbiferum, Lithophragma glabra, Lithophragma glabrum var. bulbiferum, Lithophragma glabrum var. ramulosum, Lithophragma tenellum var. floridum, Tellima bulbifera, Tellima glabra) - Bulbiferous Prairie-star, Bulblet Prairie Star, Bulbous Woodland-star, Smooth Prairie Star: Lithophragma glabrum (Synonym: Lithophragma bulbifera, Lithophragma bulbiferum, Lithophragma glabra, Lithophragma glabrum var. bulbiferum, Lithophragma glabrum var. ramulosum, Lithophragma tenellum var. floridum, Tellima bulbifera, Tellima glabra)

Smooth prairie stars in bloom along the Cherry Orchard Trail in the Columbia River Gorge.........March 14, 2012.

Inflorescence of Bulbiferous Prairie-star, Bulblet Prairie Star, Bulbous Woodland-star, Smooth Prairie Star: Lithophragma glabrum (Synonym: Lithophragma bulbifera, Lithophragma bulbiferum, Lithophragma glabra, Lithophragma glabrum var. bulbiferum, Lithophragma glabrum var. ramulosum, Lithophragma tenellum var. floridum, Tellima bulbifera, Tellima glabra) - Basal leaf of Bulbiferous Prairie-star, Bulblet Prairie Star, Bulbous Woodland-star, Smooth Prairie Star: Lithophragma glabrum (Synonym: Lithophragma bulbifera, Lithophragma bulbiferum, Lithophragma glabra, Lithophragma glabrum var. bulbiferum, Lithophragma glabrum var. ramulosum, Lithophragma tenellum var. floridum, Tellima bulbifera, Tellima glabra) - Mid-stem leaves of Bulbiferous Prairie-star, Bulblet Prairie Star, Bulbous Woodland-star, Smooth Prairie Star: Lithophragma glabrum (Synonym: Lithophragma bulbifera, Lithophragma bulbiferum, Lithophragma glabra, Lithophragma glabrum var. bulbiferum, Lithophragma glabrum var. ramulosum, Lithophragma tenellum var. floridum, Tellima bulbifera, Tellima glabra)

Smooth prairie stars blooming on open slopes above the Crawford Oaks trailhead at Columbia Hills State Park.........February 18, 2015.

Bulbiferous Prairie-star, Bulblet Prairie Star, Bulbous Woodland-star, Smooth Prairie Star: Lithophragma glabrum (Synonym: Lithophragma bulbifera, Lithophragma bulbiferum, Lithophragma glabra, Lithophragma glabrum var. bulbiferum, Lithophragma glabrum var. ramulosum, Lithophragma tenellum var. floridum, Tellima bulbifera, Tellima glabra) - Bulbiferous Prairie-star, Bulblet Prairie Star, Bulbous Woodland-star, Smooth Prairie Star: Lithophragma glabrum (Synonym: Lithophragma bulbifera, Lithophragma bulbiferum, Lithophragma glabra, Lithophragma glabrum var. bulbiferum, Lithophragma glabrum var. ramulosum, Lithophragma tenellum var. floridum, Tellima bulbifera, Tellima glabra)

The photo at left shows an early blooming smooth prairie star as seen along the old highway between the Coyote Wall Trailhead and the Labyrinth, Columbia River Gorge..........January 25, 2015. The photo at right shows smooth prairie stars blooming on a rock outcrop on USFS lands above the Wasco County Rock Quarry on Sevenmile Hill.........March 8, 2015..

Basal leaves of Bulbiferous Prairie-star, Bulblet Prairie Star, Bulbous Woodland-star, Smooth Prairie Star: Lithophragma glabrum (Synonym: Lithophragma bulbifera, Lithophragma bulbiferum, Lithophragma glabra, Lithophragma glabrum var. bulbiferum, Lithophragma glabrum var. ramulosum, Lithophragma tenellum var. floridum, Tellima bulbifera, Tellima glabra) - Bulbiferous Prairie-star, Bulblet Prairie Star, Bulbous Woodland-star, Smooth Prairie Star: Lithophragma glabrum (Synonym: Lithophragma bulbifera, Lithophragma bulbiferum, Lithophragma glabra, Lithophragma glabrum var. bulbiferum, Lithophragma glabrum var. ramulosum, Lithophragma tenellum var. floridum, Tellima bulbifera, Tellima glabra)

Inflorescence of Bulbiferous Prairie-star, Bulblet Prairie Star, Bulbous Woodland-star, Smooth Prairie Star: Lithophragma glabrum (Synonym: Lithophragma bulbifera, Lithophragma bulbiferum, Lithophragma glabra, Lithophragma glabrum var. bulbiferum, Lithophragma glabrum var. ramulosum, Lithophragma tenellum var. floridum, Tellima bulbifera, Tellima glabra)

Smooth prairiestars beginning to bloom on the south-facing slopes of Sevenmile Hill above the County Rock Quarry, Columbia River Gorge.........February 15, 2016.

Smooth Prairie Star: Lithophragma glabrum (Synonym: Lithophragma bulbifera, Lithophragma bulbiferum, Lithophragma glabra, Lithophragma glabrum var. bulbiferum, Lithophragma glabrum var. ramulosum, Lithophragma tenellum var. floridum, Tellima bulbifera, Tellima glabra)

Smooth prairie star found about 2 miles NE of Warm Springs, OR.........March 23, 1997.

Paul Slichter