[The Genus Phacelia East of the Cascade Mts. of Oregon and Washington]

Carson's Phacelia, Threadleaf Phacelia, Thread-leaf Scorpion-weed, Thread-leaf Phacelia

Phacelia linearis

Carson's Phacelia, Threadleaf Phacelia, Thread-leaf Scorpion-weed, Thread-leaf Phacelia: Phacelia linearis

The photo above shows threadleaf phacelia as seen along the old Vantage Highway on the east bank of the Columbia River north of Vantage, WA........April 30, 2007.

Close-up of the flower of Carson's Phacelia, Threadleaf Phacelia, Thread-leaf Scorpion-weed, Thread-leaf Phacelia: Phacelia linearisThe photo at right shows a close-up of the stamens of threadleaf phacelia as seen along the old Vantage Highway on the east bank of the Columbia River north of Vantage, WA........April 30, 2007. Note the long, spreading hairs on the filaments.
Characteristics:

Also known as narrow-leaved phacelia, threadleaf phacelia is an attractive annual with either a simple, unbranched stem, or more often, an erect, many-branched stem from 12.5-50 cm high. The herbage consists of minute, fine, short hairs and additional bristles over much of the plant. The leaves are all found on the stems. They are narrow or linear in shape, either sessile or with short petioles, and from 1.5-11 cm long and 1.5-12 mm wide. Some of the leaves bear 1-4 narrow, diverging segments or lobes from below mid-leaf.

The attractive flowers are clustered at the tops of the stems or branches with blue-lavender corollas which are broadly campanulate (like flared bells), the openings 8-18 mm wide The sepals are narrow or linear, with bristly margins, and the stamens are about equal in length to the corolla lobes, but extend beyond the mouth of the flower as the corolla lobes flare outwards. The style is cleft less than a third of its length.

Plants are occasionally available from nurseries and make interesting additions for dry, sunny sections at the front of the garden.


Habitat:

Threadleaf phacelia is usually found in dry open places or dry open woods at low to middle elevations.


Range:

Threadleaf phacelia may be found from southern British Columbia south along the eastern edge of the Cascades to northern California, and east to Alberta, Utah, and Wyoming.


Carson's Phacelia, Threadleaf Phacelia, Thread-leaf Scorpion-weed, Thread-leaf Phacelia: Phacelia linearis - Inflroescence of Carson's Phacelia, Threadleaf Phacelia, Thread-leaf Scorpion-weed, Thread-leaf Phacelia: Phacelia linearis

The photo at left shows a more branched specimen of threadleaf phacelia as seen along the old Vantage Highway on the east bank of the Columbia River north of Vantage, WA........April 30, 200.7. The photo at right shows a close-up of the inflorescence of threadleaf phacelia as seen along the Hard Stone Trail, western bank of the John Day River, Cottonwood Canyon State Park.......May 3, 2017.

Carson's Phacelia, Threadleaf Phacelia, Thread-leaf Scorpion-weed, Thread-leaf Phacelia: Phacelia linearis

Close-up of a flower of threadleaf phacelia as seen at a small borrow pit along Road 35 about one-half mile uphill from the southern forest boundary on Table Mountain, Wenatchee National Forest..........June 4, 2013.

Close-up of a flower of Carson's Phacelia, Threadleaf Phacelia, Thread-leaf Scorpion-weed, Thread-leaf Phacelia: Phacelia linearis - Close-up of a stem leaf of Carson's Phacelia, Threadleaf Phacelia, Thread-leaf Scorpion-weed, Thread-leaf Phacelia: Phacelia linearis

The photos above show a close-up of the flower and leaf of threadleaf phacelia as seen along the old Vantage Highway along the eastern bank of the Columbia River in central Washington........April 17, 2002. Note the numerous long, white hairs on the filaments of the flower and the narrow leaf with 2 narrow lobes at its base.

Carson's Phacelia, Threadleaf Phacelia, Thread-leaf Scorpion-weed, Thread-leaf Phacelia: Phacelia linearis - Carson's Phacelia, Threadleaf Phacelia, Thread-leaf Scorpion-weed, Thread-leaf Phacelia: Phacelia linearis

The photo at left shows a whitish-flowered threadleaf phacelia as seen high above the lower Imnaha River along the Buckhorn Lookout to Eureka Bar trail in the Wallowa-Whitman N.F........June 27, 2008. The photo at right shows threadleaf phacelia as seen in the Bickleton Ridge Unit of the Klickitat Wildlife Area........June 17, 2017..

Carson's Phacelia, Threadleaf Phacelia, Thread-leaf Scorpion-weed, Thread-leaf Phacelia: Phacelia linearis - Carson's Phacelia, Threadleaf Phacelia, Thread-leaf Scorpion-weed, Thread-leaf Phacelia: Phacelia linearis - Carson's Phacelia, Threadleaf Phacelia, Thread-leaf Scorpion-weed, Thread-leaf Phacelia: Phacelia linearis

Threadleaf phacelia as seen (left) on sand dunes atop the White Bluffs (north), Hanford Reach National Monument..........April 26, 2014.

Paul Slichter