Page authors: Don Knoke, David Giblin
Eremogone congesta
ballhead sandwort, capitate sandwort
Specimens
Photos

Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to the Rocky Mountains.

Habitat: Sagebrush desert to alpine slopes.

Flowers: June-August

Origin: Native

Conservation Status: Not of concern

Description:
General:

Tufted, glabrous perennial from a branched, woody crown, forming mats up to 15 cm. broad, the flowering stems leafy, 1.5-4 dm. tall.

Leaves:

Leaves linear, 1-nerved, 0.5-8 cm. long, the basal ones with bundles of secondary leaves in their axils.

Flowers:

Flowers several to many, usually congested in a head-like cluster, occasionally more open; sepals 5, 1-nerved, broadly scarious-margined, thickened on the back at the base, 3-6 mm. long; petals 5, white, half again as long as the sepals; stamens 10; styles 3.

Fruits:

Capsule equaling the sepals, firm-walled, opening by 6 teeth.

Accepted Name:
Eremogone congesta (Nutt.) Ikonn.
Publication: Novosti Syst. Vyssh. Rast. 10: 139. 1973.

Synonyms & Misapplications:
Arenaria congesta Nutt. [HC]
Infraspecies:
var. cephaloidea – ballhead sandwort, sharptip sandwort    Occurring east of the Cascades crest in Washington; central Washington to southern Oregon, east to west-central Idaho.
var. congesta – ballhead sandwort    Occurring east of the Cascades crest in Washinton; Washington to California, east to Montana, Utah, and Colorado.
var. prolifera – ballhead sandwort    Occurring east of the Cascades crest in Washington; Washington to southern Oregon, east to western Idaho.
Additional Resources:

PNW Herbaria: Specimen records of Eremogone congesta in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Eremogone congesta checklist entry.

E-Flora BC: Eremogone congesta atlas page.

CalPhotos: Eremogone congesta photos.

USDA Plants: Eremogone congesta information.

42 photographs:
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