[Wildrye: The Genus Elymus East of the Cascade Mountains of Oregon and Washington]

Creeping Wildrye, Quackgrass

Elymus repens

Synonyms: Agropyron caesium, Agropyron repens, Agropyron repens var. subulatum, Elytrigia repens, Elytrigia repens var. repens, Elytrigia repens var. vaillantiana, Elytrigia vaillantiana, Triticum repens, Triticum vaillantianum

Creeping Wildrye, Quackgrass: Elymus repens (Synonyms: Agropyron caesium, Agropyron repens, Agropyron repens var. subulatum, Elytrigia repens, Elytrigia repens var. repens, Elytrigia repens var. vaillantiana, Elytrigia vaillantiana, Triticum repens, Triticum vaillantianum) - Creeping Wildrye, Quackgrass: Elymus repens (Synonyms: Agropyron caesium, Agropyron repens, Agropyron repens var. subulatum, Elytrigia repens, Elytrigia repens var. repens, Elytrigia repens var. vaillantiana, Elytrigia vaillantiana, Triticum repens, Triticum vaillantianum) - Creeping Wildrye, Quackgrass: Elymus repens (Synonyms: Agropyron caesium, Agropyron repens, Agropyron repens var. subulatum, Elytrigia repens, Elytrigia repens var. repens, Elytrigia repens var. vaillantiana, Elytrigia vaillantiana, Triticum repens, Triticum vaillantianum) - Creeping Wildrye, Quackgrass: Elymus repens (Synonyms: Agropyron caesium, Agropyron repens, Agropyron repens var. subulatum, Elytrigia repens, Elytrigia repens var. repens, Elytrigia repens var. vaillantiana, Elytrigia vaillantiana, Triticum repens, Triticum vaillantianum) - Creeping Wildrye, Quackgrass: Elymus repens (Synonyms: Agropyron caesium, Agropyron repens, Agropyron repens var. subulatum, Elytrigia repens, Elytrigia repens var. repens, Elytrigia repens var. vaillantiana, Elytrigia vaillantiana, Triticum repens, Triticum vaillantianum)

Close-up views details of the inflorescence and leaf sheath of quackgrass as seen along forest road #3521, Wenatchee National Forest.........August 13, 2009.

Creeping Wildrye, Quackgrass: Elymus repens (Synonyms: Agropyron caesium, Agropyron repens, Agropyron repens var. subulatum, Elytrigia repens, Elytrigia repens var. repens, Elytrigia repens var. vaillantiana, Elytrigia vaillantiana, Triticum repens, Triticum vaillantianum) - Inflorescence of Creeping Wildrye, Quackgrass: Elymus repens (Synonyms: Agropyron caesium, Agropyron repens, Agropyron repens var. subulatum, Elytrigia repens, Elytrigia repens var. repens, Elytrigia repens var. vaillantiana, Elytrigia vaillantiana, Triticum repens, Triticum vaillantianum) - Creeping Wildrye, Quackgrass: Elymus repens (Synonyms: Agropyron caesium, Agropyron repens, Agropyron repens var. subulatum, Elytrigia repens, Elytrigia repens var. repens, Elytrigia repens var. vaillantiana, Elytrigia vaillantiana, Triticum repens, Triticum vaillantianum)

Quackgrass observed in Big Creek Campground, Logan Valley, Malheur National Forest......July 9, 2023.

Creeping Wildrye, Quackgrass: Elymus repens (Synonyms: Agropyron caesium, Agropyron repens, Agropyron repens var. subulatum, Elytrigia repens, Elytrigia repens var. repens, Elytrigia repens var. vaillantiana, Elytrigia vaillantiana, Triticum repens, Triticum vaillantianum)

An old pasture full of quackgrass observed along the Military Road at Eightmile Creek, Columbia Hills Historical State Park.....March 6, 2023. This non-native grass is densely rhizomatous and large populations can prevent many native forbs from surviving wherever it becomes established.
Paul Slichter