Burke: Erigeron nivalis vs. Erigeron howellii

	Erigeron nivalis	Erigeron howellii
	northern daisy	Howell's fleabane
Habit		Rhizomatous perennial, the stems 2-5 dm. tall, with a few woolly hairs under the heads.
Leaves		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 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 nivalis	Erigeron howellii
Flowering time	June-August	April-June
Habitat	Rocky soil areas from middle elevations in the mountains to the subalpine.	Moist, rocky places in the lowlands.
Distribution	Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains. [WildflowerSearch map] [BONAP county map]	Known only from Skamania County in Washington; Skamania County, WA to Clackamas and Multnomah counties in Oregon. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Not of concern	Threatened in Washington (WANHP)
Sibling taxa	E. acris, E. aliceae, E. annuus, E. aureus, E. basalticus, E. bloomeri, E. caespitosus, E. chrysopsidis, E. compositus, E. corymbosus, E. davisii, E. disparipilus, E. divergens, E. eatonii, E. elatus, E. filifolius, E. flettii, E. glacialis, E. howellii, E. inornatus, E. karvinskianus, E. leibergii, E. linearis, E. lonchophyllus, E. oreganus, E. peregrinus, E. philadelphicus, E. piperianus, E. poliospermus, E. pumilus, E. salishii, E. speciosus, E. strigosus, E. subtrinervis	E. acris, E. aliceae, E. annuus, E. aureus, E. basalticus, E. bloomeri, E. caespitosus, E. chrysopsidis, E. compositus, E. corymbosus, E. davisii, E. disparipilus, E. divergens, E. eatonii, E. elatus, E. filifolius, E. flettii, E. glacialis, E. inornatus, E. karvinskianus, E. leibergii, E. linearis, E. lonchophyllus, E. nivalis, E. oreganus, E. peregrinus, E. philadelphicus, E. piperianus, E. poliospermus, E. pumilus, E. salishii, E. speciosus, E. strigosus, E. subtrinervis
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: OR, WA Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Erigeron howellii

northern daisy

Howell's fleabane

Habit

Rhizomatous perennial, the stems 2-5 dm. tall, with a few woolly hairs under the heads.

Leaves

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 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.