Lepidium
hoarycress, peppergrass, pepperweed
Synonyms:
Cardaria [HC]
Coronopus [HC]
17 species
2 subspecies and varieties
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Lepidium appelianumglobepodded hoarycress, whitetop
Distribution: Widely distributed throughout many areas in Washington, though more common east of the Cascades crest; widely distributed throughout much of North America.
Habitat: Disturbed soil, waste areas, in dry and moist places.
Origin: Introduced from Asia
Flowers: April-August
Lepidium campestrefield cress, field peppergrass pepperwort
Distribution: Distributed across Washington in scattered locations; distributed throughout much of North America.
Habitat: Dry, disturbed areas.
Origin: Introduced from Eurasia
Flowers: May-July
Lepidium chalepensechalapa hoarycress, lens-podded hoarycress, Asian white-top
Distribution: Occurring east of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: Disturbed areas, especially where dry, often associated with agriculture.
Origin: Introduced from Asia
Flowers: May-June
Lepidium densiflorumcommon peppergrass, elongate peppergrass, hairy-fruited peppergrass, large-fruited peppergrass, prairie peppergrass
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout North America.
Habitat: Dry, open areas.
Origin: Native
Flowers: April-June
Lepidium dictyotumalkali peppergrass, veiny peppergrass
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Idaho, Nevada, and Utah.
Habitat: Open areas often where seasonally moist, such as vernal ponds; tolerant of alkaline soils.
Origin: Native
Flowers: April-May
Lepidium didymumlesser swinecress, lesser wartcress
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California and Arizona, and Texas eastward and northward to the Atlantic Coast.
Habitat: Roadsides, gardens and wasteland.
Origin: Introduced from South America (or possibly Eurasia)
Flowers: May-July
Lepidium drabaheart-podded hoarycress, hoary pepperwort
Distribution: Occurring chiefly east of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: Widespread weed in lowlands.
Origin: Introduced from Eurasia
Flowers: April-August
Lepidium heterophyllumSmith's pepperwort
Distribution: West of the Cascades in Washington; British Columbia south to California; in scattered locations in eastern U.S.
Habitat: Roadsides, pastures, and other disturbed ground.
Origin: Introduced from Europe
Flowers: May-June
Lepidium latifoliumdittander, broad-leaved peppergrass, broad-leaved pepperwort
Distribution: Chiefly east of the Cascades in Washington but also found in the western lowlands; widely distributed throughout central and western North America.
Habitat: Moist areas and irrigated land, but also on drier areas.
Origin: Introduced from Eurasia
Flowers: June-September
Lepidium nitidumshining peppergrass
Distribution: Known from Klickitat County in Washington; Washington south to California.
Habitat: Dry, open areas at low elevation.
Origin: Native
Flowers: March-April
Lepidium oblongum
Origin: Introduced
Lepidium oxycarpumforked pepperwort, sharpfruited pepperwort
Distribution: Chiefly in south-central California, rare in the Pacific Northwest.
Habitat: Usually on saline soil.
Origin: Native
Flowers: March - May
Lepidium perfoliatumclasping-leaved peppergrass, round-leaved peppergrass, yellow-flowered peppergrass, clasping peppergrass pepperwort
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout North America.
Habitat: Disturbed areas, such as overgrazed land and waste areas, usually where dry.
Origin: Introduced from Eurasia
Flowers: March-June
Lepidium ramosissimumbranched peppergrass, dull peppergrass
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout much of western and northern North America.
Habitat: Sagebrush, ponderosa pine forest openings, roadsides, fields, and other disturbed open areas.
Origin: Native
Flowers: June-August
Lepidium sativumgarden cress pepperwort
Origin: Introduced from western Asia
Flowers: April - June
Lepidium strictumupright peppergrass
Origin: Introduced
Lepidium virginicumtall pepperweed
Distribution: Throughout the United States, north to Alaska
Habitat: Weedy native of the lowlands
Origin: Native
Flowers: March - June
ssp. menziesii – coastal peppergrass, hairy peppergrass, Idaho peppergrass, Menzies' peppergrass, tall peppergrass, tall western peppergrass