Family = Asteraceae,
Displaying matches 1 - 50 of 373. Next page.
(= Achillea millefolium in Flora of the Pacific Northwest)
Aromatic perennial from a rhizome, 1-10 dm. tall.
Distribution: Both sides of the Cascades in Washington, from the coast to the alpine; circumboreal; widespread throughout North America.
Habitat: Common in open, dry to somewhat moist areas from low to high elevations; tolerant of disturbance.
(taxon is not treated in Flora of the Pacific Northwest)
Non-aromatic perennial, 3-10 dm. tall, short-hairy throughout.
Distribution: Introduced in Washington to Montana, and northeastern United States
Habitat: Occasionally escaped from cultivation
(= Centaurea repens in Flora of the Pacific Northwest)
Coarse, bushy perennial from deep rhizomes, 4-8 dm. tall, finely loose white-woolly throughout.
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.
(= Adenocaulon bicolor in Flora of the Pacific Northwest)
Somewhat glandular, slender perennial from fibrous roots, up to 9 dm. tall.
Distribution: Both sides of the Cascades in Washington; British Columbia south to California, east through the Rockies to Wisconsin and Ontario.
Habitat: Moist, shady woods at low to mid-elevations.
(= Eupatorium occidentale in Flora of the Pacific Northwest)
Rhizomatous perennial from a woody base, the several stems 1.5-7 dm. tall.
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Idaho and Utah.
Habitat: Rocky places at various altitudes.
(= Agoseris apargioides in Flora of the Pacific Northwest)
(= Agoseris aurantiaca in Flora of the Pacific Northwest)
Scapose, usually glabrous perennial, 1-6 dm. tall, with milky juice.
Distribution: Both sides of the Cascades in Washington; Alaska to California, east to Wyoming and New Mexico.
Habitat: Mid- to high elevations in the mountains.
(= Agoseris elata in Flora of the Pacific Northwest)
Scapose, mostly glabrous, stout perennial, 2-7 dm. tall, with milky juice.
Distribution: On both sides of the Cascades in Washington; Washington south to California.
Habitat: Meadows and open woods, from the valleys to moderate elevations in the mountains.
(= Agoseris glauca in Flora of the Pacific Northwest)
Highly variable, scapose, glabrous or hairy, sometimes glaucous perennial, 1-7 dm. tall, with milky juice.
Distribution: Widely distributed throughout Washington; Alaska south to California, east to Michigan and New Mexico.
Habitat: Open forests and open areas, low to high elevations in the mountains.
(= Agoseris grandiflora in Flora of the Pacific Northwest)
Scapose, stout perennial, 2-7 dm. tall, somewhat hairy when young, the juice milky.
Distribution: Distributed on both sides of the Cascades in Washington; British Columbia to California, east to Idaho and Nevada.
Habitat: Meadows and other open places in the lowlands and at moderate elevations in the mountains, often in dry areas.
(= Agoseris heterophylla in Flora of the Pacific Northwest)
Scapose, slender annual, usually glabrous, often with several scapes from the base, 3-40 cm. tall, with milky juice.
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to Montana and Arizona.
Habitat: Dry, open areas at low to mid-elevations.
Scapose perennial, 10-25 cm. tall, with milky juice; pubescence chiefly around the involucre, consisting partly of glandular, translucent hairs.
Distribution: East of the Cascades in Washington; Washington south to California, east to Nevada.
Habitat: Mesic meadows in the subalpine and alpine.
(= Agoseris retrorsa in Flora of the Pacific Northwest)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Nevada, Utah, and Arizona.
Habitat: Shrub-steppe and ponderosa pine forest openings.
(= Ambrosia acanthicarpa in Flora of the Pacific Northwest)
Monoecious, branching annual, 1-8 dm. tall, coarsely rough-hairy.
Distribution: Chiefly east of the Cascades, but widespread in western United States, to Texas and the Dakotas
Habitat: Weedy native in dry areas at low elevations
(= Ambrosia artemisiifolia in Flora of the Pacific Northwest)
Monoecious, branching annual, variously hairy, 1-10 dm. tall.
Distribution: Throughout the United States and the Pacific Northwest
Habitat: Drier areas at low elevations
(= Ambrosia chamissonis vars. bipinnatisecta, chamissonis in Flora of the Pacific Northwest)
Monoecious, succulent perennial 2-10 dm. tall, forming large, lax clumps, the stems much branched below the surface, the herbage silvery with appressed hairs.
Distribution: Maritime shoreline from British Columbia to california
Habitat: Common on sandy beaches above high tide level
(= Ambrosia psilostachya in Flora of the Pacific Northwest)
Monoecious perennial from creeping rhizomes, 1-10 dm. tall.
Distribution: Introduced throughout the United states, but uncommon in the Pacific Northwest.
Habitat: Waste ground.
(= Ambrosia trifida in Flora of the Pacific Northwest)
Monoecious, coarse annual from a few decimeters to several meters tall with short, stiff hairs above.
Distribution: Native and widespread in central and eastern United States; an occasional introduction in the Pacific Northwest.
Habitat: Waste places, usually in moist soil.
(= Anaphalis margaritacea in Flora of the Pacific Northwest)
Dioecious, leafy, erect, rhizomatous perennial, 2-9 dm. tall, white-woolly throughout.
Distribution: Widely distributed throughout Washington; occurring throughout North America except for portions of central and southeastern U.S.
Habitat: Dry to somewhat moist open areas, low to mid-elevations.
Biennial or short lived perennial from a short rhizome, 2-7 dm. tall, the herbage spreading-hairy, becoming glandular upwards.
Distribution: Southern British Columbia to southern California.
Habitat: Open woods.
Mat-forming, stoloniferous perennials seldom over 1 dm. tall The small leaves and narrow, pointed involucre bracts blackish-green or brown in color should separate this species from others that might be found at high elevations.
Distribution: Chiefly in the Cascades and Olympic Mountains of Washington; Circumboreal, extending south in the high mountains to California and Colorado.
Habitat: Alpine meadows.
(= Antennaria anaphaloides in Flora of the Pacific Northwest)
Robust perennial without rhizomes, white-woolly throughout, 2-5 dm. tall. The similar A. lanata grows at higher elevations, is a smaller plant, and the scarious portion of the involucre bracts is dark. A. luzuloides has involucre bracts that are scarious to the base, the lower portion pale greenish-brown.
Distribution: Chiefly east of the Cascades, British Columbia to Oregon, east to Montana and Colorado.
Habitat: Hillsides and open woods at moderate elevations in the mountains, occasionally on grassy foothills.
(= Antennaria dimorpha in Flora of the Pacific Northwest)
Plants form small, compact mats from a multi-branched woody base (caudex). Plants are not stoloniferous (horizontal stems along ground surface).
Distribution: British Columbia to southern California, east to Montana, Nebraska and Colorado; east of the Cascades in central and eastern Washington.
Habitat: Dry, open places in lowlands to foothills.
(= Antennaria flagellaris in Flora of the Pacific Northwest)
Dwarf, short-lived perennial with numerous naked stolons about 1.5 dm. long tipped with a tuft of tiny leaf buds, nearly prostrate. No other Antennaria in our area has the long, hair-like, naked stolons.
Distribution: East of the Cascades in Washington and Oregon, east to Wyoming
Habitat: Shrub-steppe to dry, open areas at mid-elevations, often in lithosol
(= Antennaria neglecta in Flora of the Pacific Northwest)
Perennial with usually leafy stolons and upright stems 1.5-4 dm. tall. The green upper surface of the leaves separates Antennaria howellii from all other species except A. racemosa. The latter usually has an open inflorescence, broader and larger leaves, and glands on the upper stem.
Distribution: British Columbia to Oregon, east to Montana
Habitat: Open woods at low to moderate elevations; not common.
(= Antennaria lanata in Flora of the Pacific Northwest)
Perennial from a short woody base, not rhizomatous, 1-2 dm. tall, densely and persistently white-woolly throughout.
Distribution: Both sides of the Cascades in Washington; British Columbia south to Oregon, east to Alberta and Wyoming.
Habitat: Mountain meadows near timberline.
(= Antennaria luzuloides in Flora of the Pacific Northwest)
Thinly white-woolly perennial with stems clustered from a short, branched woody base, 1.5-7 dm. tall. Separate from the similar A. anaphaloides by the involucre bracts; A. luzuloides is scarious throughout, while A. anaphaloides is densely pubescent on the lower portion.
Distribution: Chiefly east of the Cascades in Washington; British Columbia south to California, east to Colorado and South Dakota.
Habitat: Open, moderately dry areas from foothills to mid-elevations in the mountains.
(= Antennaria alpina var. media in Flora of the Pacific Northwest)
Mat-forming, stoloniferous perennials seldom over 1 dm. tall The small leaves and narrow, pointed involucre bracts should separate this species from others that might be found at high elevations.
Distribution: Circumboreal, south at high elevations in the mountains to California and Arizona
Habitat: Uncommon in high mountain meadows
(= Antennaria microphylla in Flora of the Pacific Northwest)
Dioecious, mat-forming, stoloniferous perennial 5-40 cm. tall; stolons up to 10 cm. long, decumbent; upper surface of the stems with stalked glands, the hairs white or purple.
Distribution: Alaska to California, east to North Dakota and Arizona, from lower montane to sub-alpine.
Habitat: Moist, open areas, flood plains of streams, margins of alkali depressions.
(= Antennaria parvifolia in Flora of the Pacific Northwest)
Stout, mat-forming, stoloniferous perennial up to 15 cm. tall, densely white-woolly throughout.
Distribution: Eastern base of the Rocky Mountains, extending westward rarely to eastern Washington and British Columbia.
Habitat: Foothills and dry open areas to moderate elevations.
(= Antennaria racemosa in Flora of the Pacific Northwest)
Perennial with creeping, leafy stolons, 1-6 dm. tall. The wide, green leaves and narrow, open inflorescence should separate Antennaria racemosa from A. howellii, the only other species in our area with green leaves, which has smaller leaves and a congested inflorescence.
Distribution: Widely distributed throughout the forested and mountainous areas of Washington; British Columbia south to California, east to the northern Rocky Mountains.
Habitat: Open, modertely dry areas from low to mid-elevations in the mountains.
Mat-forming, stoloniferous perennial 5-40 cm. tall, the herbage closely and persistently grey-woolly; stolons up to 10 cm. long, decumbent.
Distribution: Alaska to California, east to Quebec and New Mexico.
Habitat: Dry or moist ground, from near sea level to alpine.
(= Antennaria stenophylla in Flora of the Pacific Northwest)
Perennial from a short, woody base, the stems clustered, 3-15 cm. tall. Separate from Antennaria luzuloides by the narrower leaves, shorter stems and darker involucre bracts.
Distribution: East of the Cascades crest in Washington; Washington south to Nevada, east to Idaho.
Habitat: Shrub-steppe, dry meadows and open woods.
(= Antennaria umbrinella in Flora of the Pacific Northwest)
Mat-forming, stoloniferous perennial from a woody base, the stems up to 2 dm. tall.
Distribution: Washington, Oregon and British Columbia
Habitat: Uncommon in openings in the forest at moderate elevations
(= Anthemis arvensis in Flora of the Pacific Northwest)
Ill-smelling, glabrous, branched annual, 1-6 dm. tall.
Distribution: Introduced in much of the United States; more common west of the Cascades in Washington
Habitat: Roadsides, disturbed areas
(= Anthemis cotula in Flora of the Pacific Northwest)
Ill-smelling, glabrous, branched annual, 1-6 dm. tall.
Distribution: Introduced throughout the United States
Habitat: Weed of roadsides and disturbed area
(= Arctium lappa in Flora of the Pacific Northwest)
Distribution: Known from a few scattered locations in Washington; widely distributed throughout much of North America except the central U.S.
Habitat: Disturbed areas including roadsides, wastelots, and forest openings.
(= Arctium minus in Flora of the Pacific Northwest)
Coarse, perennial herb up to 1.5 m. tall. The only other Arctium species found here, A. lappa, has larger involucres and glandular peduncles.
Distribution: Introduced throughout the United States
Habitat: Weed of roadsides and disturbed area
(= Arnica chamissonis in Flora of the Pacific Northwest)
Perennial from long, naked rhizomes; stems solitary, 2-10 dm. tall; herbage variously pubescent, becoming glandular above.
Distribution: Occurring in the Cascades and northeastern corner of Washington; Alaska south to California, east across Canada and to the Rockies in the U.S.
Habitat: Meadows and wet places at moderate elevations.
(= Arnica cordifolia vars. cordifolia, pumila in Flora of the Pacific Northwest)
Perennial from long rhizomes, 1-6 dm. tall, pubescent, stems solitary or a few clustered together. The similar Arnica latifolia has smaller and usually more heads, and the leaves and achenes are usually glabrous.
Distribution: Pacific Northwest, including southern British Columbia, and east into the Rocky Mountains
Habitat: Moderately dry, open forests from fairly low (where common) to sub-alpine
(= Arnica discoidea var. eradiata in Flora of the Pacific Northwest)
Perennial from long rhizomes, the stems mostly solitary, 2-5 dm. tall, glandular-puberulent and more or less long-hairy. The similar rayless Arnica parryi has narrower leaves and the heads are nodding in bud.
Distribution: Cascades of Klickitat and Skamania counties in Washington; Washington south to California.
Habitat: Open forest at moderate elevations.
(= Arnica fulgens in Flora of the Pacific Northwest)
Perennial from a short, rooting, scaly rhizome, with stout stems 2-6 dm. tall, covered with stalked glands. The tufts of wool in the lower leaf axils should separate Arnica fulgens from the similar A. sororia.
Distribution: British Columbia to California, uncommon east to North Dakota; east of the Cascades in Washington and Oregon
Habitat: Open places from the foothills to moderate elevations in the mountains
(= Arnica latifolia var. gracilis in Flora of the Pacific Northwest)
Perennial from a scaly caudex, the several slender stems 1-3 dm. high.
Distribution: Occurring in mountainous areas throughout Washington; British Columbia south to California, east to Colorado and Utah.
Habitat: Rocky places, usually at rather high elevations in the mountains.
Perennial from a freely-rooting rhizome, 3-8 dm. tall, more or less glandular and hairy.
Distribution: Cascades Mountains to the coast in Washington; Alaska to California, east to western Montana.
Habitat: Streambanks and moist woods at moderate to mid-elevations in the mountains.
(= Arnica latifolia var. latifolia in Flora of the Pacific Northwest)
Perennial, 1-6 dm. tall, glandular at least above. The similar Arnica cordifolia has larger heads, frequently solitary; its leaves and achenes are pubescent.
Distribution: Both sides of the Cascades in Washington; Alaska south through Washington.
Habitat: Common in open forests and open, rocky areas at mid- to high elevations in the mountains.
(= Arnica longifolia in Flora of the Pacific Northwest)
Densely tufted perennial, often in large patches, from a short rhizome; many sterile, leafy stems; flowering stems leafy, 3-6 dm. high.
Distribution: Southern Alberta south to Washington, Colorado and California.
Habitat: Rocky soil in seeps or springs, cliffs, or riverbanks, at moderate to high elevations in the mountains.
(= Arnica mollis in Flora of the Pacific Northwest)
Perennial from freely rooting rhizomes, 2-6 dm. tall.
Distribution: In the mountains from British Columbia to California, east to Alberta and Colorado
Habitat: Frequent in moist meadows at mid- to high elevations in the mountains
(= Arnica nevadensis in Flora of the Pacific Northwest)
Perennial from long, naked, branched rhizomes, 1-3 dm. tall, glandular throughout, the stems often solitary. The similar Arnica cordifolia has copius long, white hairs on the involucre, while A. nevadensis is only glandular; also, A. nevadensis has entire leaves, while A. cordifolia usually has toothed leaves.
Distribution: Cascade and Olympic Mountains of Washington, south to California; rare in our range.
Habitat: Open, rocky slopes at high elevations in the mountains.
Perennial from a freely rooting rhizome, the stems solitary or tufted, 1.5-4 dm. tall.
Distribution: Both sides of the Cascades in Washington; Alaska south to California, east to Montana and Utah.
Habitat: Rocky places at moderate to high elevations in the mountains.
(= Arnica parryi var. parryi in Flora of the Pacific Northwest)
Heads generally several, narrow, with few disk flowers; involucre 10-14 mm. high with pointed bracts, covered with stalked glands; rays about 8 or about 13, 1.5-2 cm. long; pappus straw-colored, sub-plumose. The other rayless species in our area, Arnica discoidea, has wider leaves, and the heads are upright in bud.
Distribution: In the mountains from British Columbia to California, east to Alberta and Colorado
Habitat: Open woods and meadows, moderate to mid-elevations in the mountains
Displaying matches 1 - 50 of 373. Next page.
