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

Silverleaf Phacelia, White-leaf Phacelia

Phacelia hastata var. hastata

Synonyms: Phacelia hastata var. alpina (lumped here in Washington), Phacelia hastata var. leptosepala, Phacelia hastata var. leucophylla, Phacelia leptosepala, Phacelia leucophylla var. leucophylla, Phacelia leucophylla var. suksdorfii

Silverleaf Phacelia, White-leaf Phacelia: Phacelia hastata var. hastata (Synonyms: Phacelia hastata var. alpina (lumped here in Washington), Phacelia hastata var. leptosepala, Phacelia hastata var. leucophylla, Phacelia leptosepala, Phacelia leucophylla var. leucophylla, Phacelia leucophylla var. suksdorfii)

Silverleaf phacelia as seen in the Umatilla National Forest at Bald Mountain, several miles east of Tollgate, OR............July 1, 2012.

Silverleaf Phacelia, White-leaf Phacelia: Phacelia hastata var. hastata (Synonyms: Phacelia hastata var. alpina (lumped here in Washington), Phacelia hastata var. leptosepala, Phacelia hastata var. leucophylla, Phacelia leptosepala, Phacelia leucophylla var. leucophylla, Phacelia leucophylla var. suksdorfii) Photo at right of Phacelia hastata from Newberry Crater, Deschutes County, OR..........7/14/94.
Characteristics:

Silver-leaf Phacelia is a perennial with a taproot and one to several prostrate to more or less erect stems from 50-100 cm high. The stems and leaves are covered with fine, short, silvery hairs. Any bristles that may be present are mostly ascending or appressed except in the inflorescence. The leaves are simple with prominent pinnate venation and the margins are usually entire, although some leaves may have a pair of small lateral lobes at the base of the blade. The basal leaves are numerous and tufted and narrowly to broadly elliptic in shape tapering to long petioles. The stem leaves are reduced in size and become sessile on the upper stems.

The inflorescence is usually short and compact, although it may occasionally be longer and thinner. The corolla 4-7 mm long and wide and is a dull white to lavender or dull purple in coloration. The filaments are conspicuously longer than the corolla lobes.


Varieties of Silverleaf Phacelia:

var. alpina: Stems prostrate or ascending only at their tips. Leaves generally all entire. Herbage is ggreener than silvery. Flowers a light lavender to dull purple color. Plants of mountains in the Great Basin and northward to Montana, central Idaho and northeastern Oregon.

var. compacta: Stems generally prostrate an not over 15 cm tall. Leaves typically with a pair of lateral lobes. Flowers mostly whitish. Dwarf alpine and subalpine plants from the Cascades of Washington south to the Sierra Nevada and east in mountainous areas across eastern Washington to Idaho and central and southern Nevada.

var. hastata: Stems ascending to erect, generally over 15 cm high. Plants of the foothills and lower elevations. Herbage silvery. Leaves with a pair of small lateral lobes at their base. Often found in sandy soils along the Columbia River north to Kittitas County, Washington and south to Deschutes and Grant counties in Oregon.

var. leptosepala: Stems ascending or erect, generally from 15-50 cm high with greenish, bristly herbage. The larger leaves typically have a pair of lateral lobes. The flowers are whitish. Found at moderate leaves in the mountains from southern British Columbia south through central Washington to northeastern Oregon and east to northern Idaho and northwestern Montana.

var. leucophylla: Stems ascending to erect, generally over 15 cm high. Plants of the foothills and lower eleavtions. Herbage silvery. Leaves all entire or with a pair of small lateral lobes. Widespread variety across much of the Pacific Northwest to the east of the Cascades and Sierra Nevada except where variety hastata is found.


Habitat:

Silver-leaf phacelia may be found in dry rocky to sandy locations at all elevations.


Silverleaf Phacelia, White-leaf Phacelia: Phacelia hastata var. hastata (Synonyms: Phacelia hastata var. alpina (lumped here in Washington), Phacelia hastata var. leptosepala, Phacelia hastata var. leucophylla, Phacelia leptosepala, Phacelia leucophylla var. leucophylla, Phacelia leucophylla var. suksdorfii)

Photo above of silverleaf phacelia from the Dalles Mt. Rd, northeast of Dallesport, WA.....May 6 1990.

Range:

Silver-leaf phacelia may be found from southern British Columbia east to Alberta and south to California, Colorado, and western Nebraska.


Silverleaf Phacelia, White-leaf Phacelia: Phacelia hastata var. hastata (Synonyms: Phacelia hastata var. alpina (lumped here in Washington), Phacelia hastata var. leptosepala, Phacelia hastata var. leucophylla, Phacelia leptosepala, Phacelia leucophylla var. leucophylla, Phacelia leucophylla var. suksdorfii)

Silverleaf phacelia as seen in the Umatilla National Forest at Bald Mountain, several miles east of Tollgate, OR............July 1, 2012.

Silverleaf Phacelia, White-leaf Phacelia: Phacelia hastata var. hastata (Synonyms: Phacelia hastata var. alpina (lumped here in Washington), Phacelia hastata var. leptosepala, Phacelia hastata var. leucophylla, Phacelia leptosepala, Phacelia leucophylla var. leucophylla, Phacelia leucophylla var. suksdorfii)

Silverleaf phacelia as seen at Camas Land (DNR) to the the southeast of Leavenworth, Washington.........June 7, 2015.

Paul Slichter