Erigeron oreganus |
Erigeron howellii |
|
---|---|---|
Gorge fleabane, Oregon fleabane |
Howell's fleabane |
|
Habit | Perennial from a stout, woody base and root, the lax stem 5-15 cm. long, covered with glands and loose, sticky hairs. | Rhizomatous perennial, the stems 2-5 dm. tall, with a few woolly hairs under the heads. |
Leaves | Basal leaves tufted, spatulate to obovate, coarsely toothed or incised, up to 9 cm. long and 2.5 cm. wide; cauline leaves well developed, broadly lanceolate to ovate or elliptic, up to 4 cm. long and 1 cm. wide. |
Leaves alternate, thin, glabrous, the lower ones with an ellipitical blade 2-8 cm. long and 1.5-4.5 cm. wide, abruptly contracted to the 2-12 cm. petiole; middle cauline leaves ovate to cordate, strongly clasping at the base; upper leaves similar but smaller. |
Flowers | Heads 1-several in a leafy inflorescence, the disk 9-13 mm. wide; involucre 5-7 mm. high, the bracts loose, equal, thin and green; rays 30-60, pink or white to bluish; disk corollas 3.4-4.7 mm. long, yellow; pappus simple, of 15-20 bristles that are curled and twisted above. |
Heads solitary; disk 12-20 mm. wide; involucre bracts loose, equal, glandular, somewhat herbaceous; rays 30-50, white, 13-25 mm. long and 2-4 mm. wide; disk corollas yellow, 4-5 mm. long, the lobes flaring; pappus simple, of 20-30 capillary bristles. |
Fruits | Achenes asymmetrically 5-nerved. |
|
Erigeron oreganus |
Erigeron howellii |
|
Flowering time | May-September | April-June |
Habitat | Moist shady cliffs and ledges. | Moist, rocky places in the lowlands. |
Distribution | Occurring in the Columbia River Gorge in Washington; Columbia River Gorge in Washington to adjacent Gorge area in Oregon.
|
Known only from Skamania County in Washington; Skamania County, WA to Clackamas and Multnomah counties in Oregon.
|
Origin | Native | Native |
Conservation status | Threatened in Washington (WANHP) | Threatened in Washington (WANHP) |
Sibling taxa | ||
Web links |