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FNA | Family List | FNA Vol. 5 | Polygonaceae | Eriogonum

17. Eriogonum lancifolium Reveal & Brotherson, Great Basin Naturalist. 27: 187, fig. 1. 1968.

Lance-leaf wild buckwheat

Eriogonum corymbosum Bentham var. davidsei Reveal

Shrubs, spreading, not scapose, 3.5-8(-10) × 5-10(-13) dm, grayish-tomentose, grayish. Stems spreading, usually without persistent leaf bases, sheathing up to 1/2 or more height of plant; caudex stems absent; aerial flowering stems erect to spreading, slender, solid, not fistulose, 0.5-1.2 dm, tomentose.  Leaves cauline, 1 per node; petiole 0.3-0.6 cm, tomentose; blade lanceolate to elliptic, 3-5 × 0.5-2 cm, densely silvery-tomentose on both surfaces or rarely less so to subglabrous and greenish abaxially, margins plane or slightly revolute, sometimes crenulate. Inflorescences cymose, often compact, (3-)6-14 × 3-10 dm; branches dichtomous, tomentose to subglabrous; bracts 3, scalelike, linear, and 1.5-3 mm, or leaflike, 10-15 mm, and similar to leaf blades. Peduncles absent. Involucres 1 per node, turbinate, 2.5-3 × 1.5-2 mm; teeth 5, erect, 0.4-1 mm. Flowers (2-)2.5-3.5 mm; perianth white to cream, glabrous; tepals connate proximal 1/ 4, essentially monomorphic, spatulate; stamens exserted, 1.5-4.5 mm; filaments glabrous or slightly pilose proximally. Achenes brown, 2-2.5 mm, glabrous. 2n = 40.

Flowering Jul-Oct. Heavy clay flats and slopes, mixed grassland and saltbush communities, juniper woodlands; of conservation concern; 1500-1800 m; Utah.

Eriogonum lancifolium is known only from Mancos Shale hills and flats east and south of Wellington, in Carbon and Emery counties. The largest population is found on the flats south of Mounds Reef. S. L. Welsh et al. (2003) reduced this species to synonymy under E. corymbosum var. corymbosum.


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