[The Mustard Family East of the Cascade Mts. of Oregon and Washington]

Wall flowers East of the Cascade Mountains of Oregon and Washington

The Genus Erysimum

Pale Wallflower: Erysimum occidentale

Pale Wallflower: Erysimum occidentale

Cascade Wallflower, Sand-dwelling Wallflower: Erysimum arenicola (Synonyms: Cheiranthus arenicola, Erysimum arenicola var. arenicola, Erysimum arenicola var. torulosum,Erysimum perenne var. tephrinum, Erysimum torulosum)

Douglas' Wallflower, Prairie Rocket, Rough Wallflower, Sanddune Wallflower, Western Wallflower: Erysimum capitatum var. capitatum (Synonyms: Erysimum arkansanum, Erysimum asperum, Erysimum asperum ssp. capitatum, Erysimum asperum var. arkansanum, Erysimum asperum var. capitatum , Erysimum capitaum var. stellatum, Erysimum capitatum var. washoense, Erysimum elatum, Erysimum moniliforme, Erysimum wheeleri) - Petals 15-25 mm long, lemon yellow to orange or reddish. Fruits 4-angled, 3-15 cm long on spreading to ascending pedicels.

Treacle Mustard, Wormseed Mustard: Erysimum cheiranthoides (Cheiranthus cheiranthoides, Cheirnia cheiranthoides) - Petals 4-5 mm long. Fruits 12-27 mm long.

Aegean Wallflower: Erysimum cheiri (Synonym: Cheiranthus cheiri)

Prairie Rocket, Small Wallflower, Small-flowered Rocket: Erysimum inconspicuum (Synonyms: Erysimum inconspicuum var. inconspicuum, Erysimum parviflorum)- Petals less than 11 mm long, light to pale yellow. Fruits less than 5 cm long with pedicels about one-half as thick as the fruit.

Pale Wallflower: Erysimum occidentale (Synonyms: Cheiranthus occidentalis, Cheirinia occidentalis) - Petals yellow, 12-18 mm long. Fruits flattened, 18-100 mm long.

Sierra Wallflower: Erysimum perenne (Synonyms: Erysimum capitatum ssp. perenne, Erysimum capitatum var. perenne)

Bushy Wallflower, Repand Wallflower, Spreading Wallflower: Erysimum repandum (Synonym: Cheirinia repanda) - Petals less than 11 mm long, light to pale yellow. Fruits 4-10 cm long with pedicels as thick as the fruit.

Paul Slichter E-Mail