Page authors: David Giblin, Don Knoke
Leymus mollis
American dunegrass
WTU specimens
Other herbaria

Distribution: Coastal areas of Washington; Alaska south to California; northern areas of North America.

Habitat: Coastal sand dunes, marshes, headlands.

Flowers: June-August

Origin: Native

Conservation Status: Not of concern

Description:
General:

Strong perennial with thick rhizomes but forming large clumps, the culms stout, erect, 5-15 dm. tall, usually finely hairy above.

Leaves:

Sheaths open, glabrous; auricles developed on some leaves; ligules up to 1 mm. long; blades tough, flat, 6-15 mm. broad, with numerous prominent nerves.

Flowers:

Inflorescence a terminal, stout spike 15-30 cm. long and 1-2 cm. thick; spikelets usually two per node, 20-30 mm. long and 4- to 6-flowered; glumes lanceolate, acuminate, 15-25 mm. long, prominently 3- to 6-nerved, usually soft-pubescent; lemmas prominently nerved, 10-20 mm. long, acuminate but not awned, usually copiously soft-hairy; paleas about equal to the lemmas.

Accepted Name:
Leymus mollis (Trin.) Pilg.

Synonyms & Misapplications:
Elymus arenarius L. ssp. mollis (Trin.) Hultén
Elymus arenarius L. var. scabrinervis (Bowden) B. Boivin
Elymus mollis Trin. [HC]
Leymus arenarius (L.) Hochst. ssp. mollis (Trin.) Tzvelev
Infraspecies:
ssp. mollis – American dunegrass
Additional Resources:

PNW Herbaria: Specimen records of Leymus mollis in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Leymus mollis checklist entry.

E-Flora BC: Leymus mollis atlas page.

CalPhotos: Leymus mollis photos.

USDA Plants: Leymus mollis information.

6 photographs:
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