Erigeron subtrinervis |
Erigeron basalticus |
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three-veined fleabane |
basalt fleabane |
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Habit | Perennial from a short, woody base, 1.5-8 dm. tall, the stems clustered, amply leafy, spreading-hairy throughout. | Several stems from a perennial taproot, sprawling, branched and leafy, especially near the tip. |
Leaves | Leaves triple-nerved, entire, the lower oblanceolate or spatulate, petiolate, mostly deciduous, the other becoming sessile but ample. |
Leaves with stiff, blunt hairs and fine glands, wedge-shaped to obovate, up to 4 cm. long and 1.5 cm. wide, deeply tri-lobed, the lobes broad. |
Flowers | Heads 1-13 in a open inflorescence; involucre 6-9 mm. high; rays 65-150, blue or rarely white or pink, 9-18 mm. long and 1 mm. wide; pappus 20-30 bristles, a few of the outer ones shorter. |
Heads terminating the branches, the disk 8-12 mm. wide; involucre 5-6 mm. high, densely glandular; rays 25-30, light pink or pinkish-purple, 5-7 mm. long and 1.5 mm. wide; disk corollas 3-4 mm. long, pale yellow; pappus of 10-15 capillary bristles. |
Erigeron subtrinervis |
Erigeron basalticus |
|
Flowering time | July-September | May-July |
Habitat | Moderately dry, open places at low to middle elevations. | Cliff crevices in rocky canyons. |
Distribution | Occurring on both sides of the Cascades crest in Washington; British Columbia to Washington, east to the Rocky Mountains.
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Occurring east of the Cascades crest where endemic to Kittitas and Yakima counties in Washington.
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Origin | Native | Native |
Conservation status | Not of concern | Threatened in Washington (WANHP) |
Sibling taxa | ||
Web links |