[Strict Buckwheat] [Buckwheats: The Genus Eriogonum East of the Cascade Mountains of Oregon and Washington]

Blue Mountain Buckwheat, Proliferous Wild Buckwheat, Strict Buckhweat

Eriogonum strictum var. proliferum

Synonyms: Eriogonum fulvum, Eriogonum ovalifolium var. proliferum, Eriogonum proliferum, Eriogonum strictum ssp. bellum, Eriogonum strictum ssp. proliferum, Eriogonum srictum ssp. proliferum var. proliferum, Eriogonum strictum var. argenteum

Flower head of Strict Buckwheat: Eriogonum strictum var. proliferum (Synonyms: Eriogonum fulvum, Eriogonum proliferum, Eriogonum strictum ssp. bellum, Eriogonum strictum ssp. proliferum var. proliferum, Eriogonum strictum var. argenteum)

The photo above shows several flower heads of strict buckwheat (var. proliferum) as seen at Horsethief butte to the northeast of The Dalles, OR ...........October 7, 2006. Note the dense coat of white hairs lining parts of the stem as well as the involucel.

Flowers of Strict Buckwheat: Eriogonum strictum var. proliferum (Synonyms: Eriogonum fulvum, Eriogonum proliferum, Eriogonum strictum ssp. bellum, Eriogonum strictum ssp. proliferum var. proliferum, Eriogonum strictum var. argenteum) The photo at right shows a close-up of the flowers of strict buckwheat as seen at Horsethief Butte........October 7, 2006. Note the numerous white hairs at the base of each petal.
Characteristics:

Strict buckwheat is a mat forming subshrub to 60 cm tall. The woody stems are prostrate to ascending. The flower stems are leafless above the basal leaves, although a pair of tiny bracts may be found at the point where the stem branches into the inflorescence. The leaves are mostly basal, with the blades oval to ovate in shape tapering abruptly to long, thin petioles which are 1-4 times longer than the blade.. The leaves range from 5-25 mm long and the lower blade surface is gray-woolly, the upper surface being gray to green, either woolly to sparsely haired.

The inflorescence is open and two to three branched, subtended by 2 linear bracts. The involucres are tubular and bell-shaped and range from 3-5 mm long. Five short, erect triangular teeth are found at the distal end of the involucral tube. The flowers are typically white, creamy, or occasionally yellow as in the variety anserinum. The individual flowers range from 3-4 mm long and lack hairs on their outer surfaces.


Varieties of Strict Buckwheat:

subspecies strictum : Involucres solitary and glabrous. Open inflorescence. Leaf blades greenish above, elliptic to ovate-elliptic inshape, and 1-2 cm long. Petioles 2-4 longer than blade. Flowers white, cream, light yellow or pink. Found in the Blue Mts. and Wallowa Mts. of southeastern Washington and northeastern Oregon and west-central Idaho.

subspecies proliferum variety anserinum : Involucres tomentose. If glabrous, the involucres are congested. Leaves grayish on both surfaces. Flowers yellow. Found along the east base of the Cascade Mts from Chelan County, Washington south to south-central and southeastern Oregon, northeastern California and Nevada.

subspecies proliferum variety glabrum : Involucres congested and mostly glabrous. Leaves grayish on both surfaces. Flowers white or cream. Found from Yakima, west Grant, and Douglas Counties in Washington.

subspecies proliferum variety proliferum : Involucres floccose to tomentose and congested. Flowers white or cream Leaves grayish on both surfaces. Found across the range of the species but less common within the range of the above varieties.


Habitat:

Found in both Ponderosa Pine forests and sagebrush, on sandy or gravelly soil.


Range:

A widespread species, found from north-central Washington east to Idaho and western Montana, south to Nevada, then west to the east slopes of the Sierra of northern California and Cascades of the Pacific Northwest.


Dorsal leaf surface of Strict Buckwheat: Eriogonum strictum var. proliferum (Synonyms: Eriogonum fulvum, Eriogonum proliferum, Eriogonum strictum ssp. bellum, Eriogonum strictum ssp. proliferum var. proliferum, Eriogonum strictum var. argenteum)

Ventral leaf surface of Strict Buckwheat: Eriogonum strictum var. proliferum (Synonyms: Eriogonum fulvum, Eriogonum proliferum, Eriogonum strictum ssp. bellum, Eriogonum strictum ssp. proliferum var. proliferum, Eriogonum strictum var. argenteum)

The photos above show the leaves of Eriogonum strictum var. proliferum. Note the lighter gray vental surface (at bottom), and the upper surface (above), with a tinge of green visible. Photo taken at Horsethief Butte, Columbia River Gorge..........October 7, 2006.

Strict Buckwheat: Eriogonum strictum var. proliferum (Synonyms: Eriogonum fulvum, Eriogonum proliferum, Eriogonum strictum ssp. bellum, Eriogonum strictum ssp. proliferum var. proliferum, Eriogonum strictum var. argenteum) - Strict Buckwheat: Eriogonum strictum var. proliferum (Synonyms: Eriogonum fulvum, Eriogonum proliferum, Eriogonum strictum ssp. bellum, Eriogonum strictum ssp. proliferum var. proliferum, Eriogonum strictum var. argenteum)

Views of strict buckwheat (var. proliferum) as seen along US Highway 97 at a pass about ten miles southwest of Toppenish, WA.........June 5, 2009.


Involucel of Strict Buckwheat: Eriogonum strictum var. proliferum (Synonyms: Eriogonum fulvum, Eriogonum proliferum, Eriogonum strictum ssp. bellum, Eriogonum strictum ssp. proliferum var. proliferum, Eriogonum strictum var. argenteum) - Inflorescence of Strict Buckwheat: Eriogonum strictum var. proliferum (Synonyms: Eriogonum fulvum, Eriogonum proliferum, Eriogonum strictum ssp. bellum, Eriogonum strictum ssp. proliferum var. proliferum, Eriogonum strictum var. argenteum)

Basal leaves of Strict Buckwheat: Eriogonum strictum var. proliferum (Synonyms: Eriogonum fulvum, Eriogonum proliferum, Eriogonum strictum ssp. bellum, Eriogonum strictum ssp. proliferum var. proliferum, Eriogonum strictum var. argenteum)

Close-up views of strict buckwheat (var. proliferum) as seen along US Highway 97 at a pass about ten miles southwest of Toppenish, WA.........June 5, 2009.


Blue Mountain Buckwheat, Proliferous Wild Buckwheat, Strict Buckhweat: Eriogonum strictum var. proliferum (Synonyms: Eriogonum fulvum, Eriogonum ovalifolium var. proliferum, Eriogonum proliferum, Eriogonum strictum ssp. bellum, Eriogonum strictum ssp. proliferum, Eriogonum srictum ssp. proliferum var. proliferum, Eriogonum strictum var. argenteum) - Blue Mountain Buckwheat, Proliferous Wild Buckwheat, Strict Buckhweat: Eriogonum strictum var. proliferum (Synonyms: Eriogonum fulvum, Eriogonum ovalifolium var. proliferum, Eriogonum proliferum, Eriogonum strictum ssp. bellum, Eriogonum strictum ssp. proliferum, Eriogonum srictum ssp. proliferum var. proliferum, Eriogonum strictum var. argenteum)

Inflorescence of Blue Mountain Buckwheat, Proliferous Wild Buckwheat, Strict Buckhweat: Eriogonum strictum var. proliferum (Synonyms: Eriogonum fulvum, Eriogonum ovalifolium var. proliferum, Eriogonum proliferum, Eriogonum strictum ssp. bellum, Eriogonum strictum ssp. proliferum, Eriogonum srictum ssp. proliferum var. proliferum, Eriogonum strictum var. argenteum) - Basal leaves of Blue Mountain Buckwheat, Proliferous Wild Buckwheat, Strict Buckhweat: Eriogonum strictum var. proliferum (Synonyms: Eriogonum fulvum, Eriogonum ovalifolium var. proliferum, Eriogonum proliferum, Eriogonum strictum ssp. bellum, Eriogonum strictum ssp. proliferum, Eriogonum srictum ssp. proliferum var. proliferum, Eriogonum strictum var. argenteum) - Inflorescence of Blue Mountain Buckwheat, Proliferous Wild Buckwheat, Strict Buckhweat: Eriogonum strictum var. proliferum (Synonyms: Eriogonum fulvum, Eriogonum ovalifolium var. proliferum, Eriogonum proliferum, Eriogonum strictum ssp. bellum, Eriogonum strictum ssp. proliferum, Eriogonum srictum ssp. proliferum var. proliferum, Eriogonum strictum var. argenteum)

Additional photos of proliferous buckwheat as seen around Calamity Lookout, Malheur National Forest........July 18, 2010.

Blue Mountain Buckwheat, Proliferous Wild Buckwheat, Strict Buckhweat: Eriogonum strictum var. proliferum (Synonyms: Eriogonum fulvum, Eriogonum ovalifolium var. proliferum, Eriogonum proliferum, Eriogonum strictum ssp. bellum, Eriogonum strictum ssp. proliferum, Eriogonum srictum ssp. proliferum var. proliferum, Eriogonum strictum var. argenteum)

Proliferous buckwheat as seen on rocky slopes uphill to the north of the day use area at Cottonwood Canyon State Park, Sherman County, Oregon.........March 18, 2016.


Inflorescence of Strict Buckwheat: Eriogonum strictum var. proliferum (Synonyms: Eriogonum fulvum, Eriogonum proliferum, Eriogonum strictum ssp. bellum, Eriogonum strictum ssp. proliferum var. proliferum, Eriogonum strictum var. argenteum)

The photo above shows the leaves of strict buckwheat (var. proliferum) as seen at Sun Lakes State Park in central Washington........May 2, 1998.

Paul Slichter