Vascular Plants
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Common names beginning with K:
Milky kelloggia (Kelloggia galioides)
Distribution: In the Olympics and east of the Cascades in Washington; Washington south to California, east to Montana, Wyoming and New Mexico
Habitat: Forest openings, mid- to high elevations in the mountains.
Origin: Native
Kenilworth-ivy (Cymbalaria muralis)
Distribution: Introduced west of the Cascades, British Columbia to Oregon
Habitat: Wasteland,disturbed soil
Origin: Introduced from Eurasia
Kindlingweed (Gutierrezia sarothrae)
Distribution: East of the Cascades in Washington, chiefly in southeastern part of state; Alberta to Manitoba, south to California and Texas.
Habitat: Dry, open places in the foothills, valleys and plains.
Origin: Native
King's-cureall (Oenothera biennis)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: Meadows and stream banks, from the plains to the lower mountains, typically where disturbed.
Origin: Introduced from Europe
Kinnikinnik (Arctostaphylos uva-ursi)
Distribution: Widely distributed throughout Washington; Alaska south to California and New Mexico, east to the Atlantic Coast; circumboreal.
Habitat: Coastal bluffs and prairies, rocky balds, dry subalpine meadows, and dry coniferous forest.
Origin: Native
Kiss-me-over-the-garden-gate (Persicaria orientalis)
Origin: Introduced
Fringe-petal kitten's-tail (Synthyris schizantha)
Distribution: In the Olympics and Cascades foothills of western Washington; Washington south to northwest Oregon.
Habitat: Uncommon on moist ground at mid-elevations in the mountains.
Origin: Native
Mountain kittentails (Synthyris missurica)
Distribution: Columbia River Gorge, southeast Washington and northeast Oregon, east to Idaho and Montana and south to California
Habitat: Moist ground, foothills to mid-elevations in the mountains
Origin: Native
Black knapweed (Centaurea nigra)
Distribution: Introduced in the Pacific Northwest and northeastern United States
Habitat: Uncommon weed in disturbed soil
Origin: Introduced from Europe
Brown knapweed (Centaurea jacea)
Origin: Introduced from Europe
Brownray knapweed (Centaurea jacea)
Origin: Introduced from Europe
Diffuse knapweed (Centaurea diffusa)
Distribution: Introduced throughout the Pacific Northwest; widespread and common in eastern Washington
Habitat: Noxious weed of dry, disturbed areas
Origin: Introduced from the eastern Mediterranean region
Featherhead knapweed (Centaurea trichocephala)
Origin: Introduced
Globe knapweed (Centaurea macrocephala)
Distribution: Sparingly introduced in Washington
Habitat: Occasionally escapes from cultivation
Origin: Introduced
Hybrid knapweed (Centaurea ×gerstlaueri)
Distribution: British Columbia to California, east to Idaho and Montana; also in eastern North America.
Habitat: Open ground, often where disturbed.
Origin: Introduced
Hybrid knapweed (Centaurea ×gerstlaueri)
Distribution: British Columbia to California, east to Idaho and Montana; also in eastern North America.
Habitat: Open ground, often where disturbed.
Origin: Introduced
Iberian knapweed (Centaurea iberica)
Origin: Introduced
Lesser knapweed (Centaurea nigra)
Distribution: Introduced in the Pacific Northwest and northeastern United States
Habitat: Uncommon weed in disturbed soil
Origin: Introduced from Europe
Meadow knapweed (Centaurea ×moncktonii)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho and Montana; also in the upper Midwest of the U.S. and northeastern North America.
Habitat: Disturbed meadows and forest openings, roadsides, and waste areas.
Origin: Introduced from Europe
Meadow knapweed (Centaurea ×moncktonii)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho and Montana; also in the upper Midwest of the U.S. and northeastern North America.
Habitat: Disturbed meadows and forest openings, roadsides, and waste areas.
Origin: Introduced from Europe
Protean knapweed (Centaurea ×moncktonii)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho and Montana; also in the upper Midwest of the U.S. and northeastern North America.
Habitat: Disturbed meadows and forest openings, roadsides, and waste areas.
Origin: Introduced from Europe
Russian knapweed (Acroptilon repens)
Distribution: Introduced chiefly east of the Cascades in Washington; widely distributed throughout much of North America.
Habitat: Dry, open areas at low elevation and foothills.
Origin: Introduced
Short fringed knapweed (Centaurea nigrescens)
Distribution: Introduced and widely distributed in northeast United States and southeast Canada; occasional in the Pacific Northwest.
Habitat: Fields, roadsides and waste places.
Origin: Introduced from Europe
Tumble knapweed (Centaurea diffusa)
Distribution: Introduced throughout the Pacific Northwest; widespread and common in eastern Washington
Habitat: Noxious weed of dry, disturbed areas
Origin: Introduced from the eastern Mediterranean region
Tyrol knapweed (Centaurea nigrescens)
Distribution: Introduced and widely distributed in northeast United States and southeast Canada; occasional in the Pacific Northwest.
Habitat: Fields, roadsides and waste places.
Origin: Introduced from Europe
White knapweed (Centaurea diffusa)
Distribution: Introduced throughout the Pacific Northwest; widespread and common in eastern Washington
Habitat: Noxious weed of dry, disturbed areas
Origin: Introduced from the eastern Mediterranean region
Annual knawel (Scleranthus annuus)
Distribution: Occasional introductions throughout the Pacific Northwest
Habitat: Disturbed soils, waste lots, cultivated areas.
Origin: Introduced from Europe
Doubtful knight's-spur (Consolida ajacis)
Distribution: Limited in distribution to a few localities west of the Cascades in Washington; widely distributed throughout much of North America.
Habitat: Drainage ditches, roadsides, old home sites, waste areas.
Origin: Introduced
Knotgrass (Paspalum distichum)
Distribution: Occurring chiefly along the lower Columbia River corridor in Washington; occurring in most of western North America and the southeastern U.S.
Habitat: Along ditches and streams where the soil is moist much of the season.
Origin: Introduced
Austin's knotweed (Polygonum austiniae)
Distribution: Central Oregon to northeast California, east to Idaho and southcentral Montana.
Habitat: Dry to moist banks and flats, from sagebrush plains to lower mountains, often with ponderosa pine.
Origin: Native
Austin's knotweed (Polygonum austiniae)
Distribution: Central Oregon to northeast California, east to Idaho and southcentral Montana.
Habitat: Dry to moist banks and flats, from sagebrush plains to lower mountains, often with ponderosa pine.
Origin: Native
Beach knotweed (Polygonum paronychia)
Distribution: Occurring west of the Cascades crest along the coast; Vancouver Island, B.C., south to Monterey, California.
Habitat: Coastal shorelines and sand dunes.
Origin: Native
Black knotweed (Polygonum paronychia)
Distribution: Occurring west of the Cascades crest along the coast; Vancouver Island, B.C., south to Monterey, California.
Habitat: Coastal shorelines and sand dunes.
Origin: Native
Blake's knotweed (Polygonum achoreum)
Origin: Native
Bohemian knotweed (Fallopia x bohemica)
Origin: Introduced from eastern Asia
Bohemian knotweed (Fallopia x bohemica)
Origin: Introduced from eastern Asia
California knotweed (Polygonum californicum)
Origin: Native
Dotted knotweed (Persicaria punctata)
Distribution: Occurring mostly in south-central Washington; British Columbia south to California, east to the Atlantic Coast.
Habitat: Lake and pond shores, marshes, and wet forests.
Origin: Native
Douglas' knotweed (Polygonum douglasii)
Distribution: Widely distributed throughout most of Washington; British Columbia south to California, east to the Rocky Mountains and across northern U.S./southern Canada to the Atlantic Coast.
Habitat: Common in dry to moist areas, lowlands to mid-elevations in the mountains.
Origin: Native
Douglas's knotweed (Polygonum douglasii)
Distribution: Widely distributed throughout most of Washington; British Columbia south to California, east to the Rocky Mountains and across northern U.S./southern Canada to the Atlantic Coast.
Habitat: Common in dry to moist areas, lowlands to mid-elevations in the mountains.
Origin: Native
Erect knotweed (Polygonum erectum)
Origin: Native
Fall knotweed (Polygonum spergulariiforme)
Distribution: British Columbia to California, chiefly west of the Cascades in Washington, east to southeast Washington, Idaho and Colorado.
Habitat: Gravelly, sandy or heavy dry or moist soil at low elevations.
Origin: Native
Fall knotweed (Polygonum spergulariiforme)
Distribution: British Columbia to California, chiefly west of the Cascades in Washington, east to southeast Washington, Idaho and Colorado.
Habitat: Gravelly, sandy or heavy dry or moist soil at low elevations.
Origin: Native
Garden knotweed (Persicaria wallichii)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California; also in eastern North America.
Habitat: Waste areas, roadsides, and other disturbed areas where often where somewhat moist.
Origin: Introduced from eastern Asia
Giant knotweed (Fallopia sachalinensis)
Origin: Introduced from eastern Asia
Giant knotweed (Fallopia sachalinensis)
Origin: Introduced from eastern Asia
Himalayan knotweed (Persicaria wallichii)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California; also in eastern North America.
Habitat: Waste areas, roadsides, and other disturbed areas where often where somewhat moist.
Origin: Introduced from eastern Asia
Himalayan knotweed (Persicaria wallichii)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California; also in eastern North America.
Habitat: Waste areas, roadsides, and other disturbed areas where often where somewhat moist.
Origin: Introduced from eastern Asia
Hybrid Japanese knotweed (Fallopia x bohemica)
Origin: Introduced from eastern Asia
Hybrid Japanese knotweed (Fallopia x bohemica)
Origin: Introduced from eastern Asia
Japanese knotweed (Fallopia japonica)
Origin: Introduced from eastern Asia
Japanese knotweed (Fallopia japonica)
Origin: Introduced from eastern Asia
Leafy dwarf knotweed (Polygonum minimum)
Distribution: British Columbia south in the Cascades and higher coastal mountains to the southern Sierra Navada, east in the Rockies from Montana to Colorado.
Habitat: Open or semi-barren soil in the alpine and subalpine.
Origin: Native
Nuttall's knotweed (Polygonum nuttallii)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia south to Oregon
Habitat: Prairies, grassy balds, and forest openings at low to moderate elevations.
Origin: Native
Palouse knotweed (Polygonum majus)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Dry, often semi-barren, gravelly to heavy soil, sagebrush desert to lower mountains.
Origin: Native
Parry's knotweed (Polygonum parryi)
Origin: Native
Spurry knotweed (Polygonum spergulariiforme)
Distribution: British Columbia to California, chiefly west of the Cascades in Washington, east to southeast Washington, Idaho and Colorado.
Habitat: Gravelly, sandy or heavy dry or moist soil at low elevations.
Origin: Native
Spurry knotweed (Polygonum spergulariiforme)
Distribution: British Columbia to California, chiefly west of the Cascades in Washington, east to southeast Washington, Idaho and Colorado.
Habitat: Gravelly, sandy or heavy dry or moist soil at low elevations.
Origin: Native
Wiry knotweed (Polygonum majus)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Dry, often semi-barren, gravelly to heavy soil, sagebrush desert to lower mountains.
Origin: Native
Wiry knotweed (Polygonum majus)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Dry, often semi-barren, gravelly to heavy soil, sagebrush desert to lower mountains.
Origin: Native
Zigzag knotweed (Polygonum minimum)
Distribution: British Columbia south in the Cascades and higher coastal mountains to the southern Sierra Navada, east in the Rockies from Montana to Colorado.
Habitat: Open or semi-barren soil in the alpine and subalpine.
Origin: Native
Bellard's kobresia (Kobresia myosuroides)
Origin: Native
Kruhsea (Streptopus streptopoides)
Origin: Native
Kruhsea (Streptopus streptopoides)
Origin: Native