Eriogonum soredium Reveal
Family: Polygonaceae
Eriogonum soredium image
Daniela Roth  
Herbs, matted, scapose, 0.01-0.1 × 1-3 dm, densely white-tomentose, whitish. Stems matted, with persistent leaf bases, up to 1/ 5 height of plant; caudex stems matted; aerial flowering stems scapelike, erect, slender, solid, not fistulose, 0.02-0.15 dm, tomentose.  Leaves basal, fasciculate and sheathing nearly entire length of stem; petiole 0.05-0.2(-0.3) cm, tomentose; blade narrowly elliptic to narrowly oblong, 0.2-0.7 × (0.07-)0.1-0.25 cm, densely white-tomentose, margins plane. Inflorescences capitate, 0.5-1 cm; branches absent; bracts 6-8, scalelike, lanceolate to narrowly triangular, 1.3-1.6 mm. Peduncles absent. Involucres 4-6 per cluster, turbinate, 2-2.5 × 1.3-1.5 mm, rigid; teeth (4-)5, erect, 0.5-0.6 mm. Flowers (1.5-)2-2.5 mm; perianth white, glabrous; tepals connate proximal 1/ 4, slightly dimorphic, oblanceolate to ovate or obovate, those of outer whorl 1.5-2 mm wide, those of inner whorl 1-1.5 mm wide; stamens included, 2-2.5 mm; filaments sparsely pubescent proximally. Achenes light brown, 2-2.5 mm, glabrous. Flowering Jun-Sep. Gravelly to rocky limestone slopes, mixed saltbush and sagebrush communities, pinyon-juniper woodlands; of conservation concern; 2000-2300 m; Utah. Eriogonum soredium is a rare and localized species known only from the San Francisco Mountains of Beaver County. It is considered a 'sensitive' species in Utah, and occasionally is seen in cultivation.

Eriogonum soredium image
Daniela Roth  
Eriogonum soredium image
Tony Frates  
Eriogonum soredium image
Tony Frates  
Eriogonum soredium image
Tony Frates  
Eriogonum soredium image
Daniela Roth  
Eriogonum soredium image
Daniela Roth  
Eriogonum soredium image
Daniela Roth  
The National Science Foundation
This project made possible by National Science Foundation Award 1410069