Burke: Hieracium longiberbe vs. Hieracium albiflorum

	Hieracium longiberbe	Hieracium albiflorum
	long-bearded hawkweed	white hawkweed, white-flowered hawkweed
Habit	Perennial herbs with milky juice, the stems 3-6 dm. tall, sub-glabrous or with a few long bristles.	Perennial from fibrous roots and a short rhizome, 3-13 dm. tall, a few long hairs on the lower stem, with milky juice.
Leaves	: Leaves alternate, several, the lowermost reduced and early-deciduous, those next above the largest, up to 12 cm. long and 3 cm. wide, the middle ones well developed and only gradually reduced upward; leaves thin, often toothed, with bristly hairs on the margins, but sparsely hairy to glabrous on the surfaces.	Basal and lower cauline leaves persistent and tufted, mostly entire, 4-17 cm. long including the short petiole, and 1.2-4.5 cm. wide; middle and upper leaves sessile and reduced; stellate hairs wanting.
Flowers	Heads few to several in a flat-topped inflorescence; involucre 9-11 mm.high, with fine, stellate hairs and a few long bristles; corollas all ligulate, yellow	Heads several to many in an open inflorescence, on slender peduncles; involucre 6-11 mm. high, narrow, blackish-green, nearly glabrous; corollas 13-34, all ligulate and white; pappus of whitish capillary bristles.
Fruits	Achene.	Achenes ribbed and grooved longitudinally.

	Hieracium longiberbe	Hieracium albiflorum
Flowering time	June-July	June-September
Habitat	Dry rocky slopes and ledges.	Open woods from low to middle elevations.
Distribution	Occurring in the Columbia River Gorge in Washington; south-central Washington to adjacent north-central Oregon; endemic to the Columbia River Gorge. [WildflowerSearch map] [BONAP county map]	Widely distributed in forested areas on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains, northern Great Plains, Great Lakes region, and eastern Canada. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Not of concern	Not of concern
Sibling taxa	H. albiflorum, H. aurantiacum, H. caespitosum, H. flagellare, H. ×floribundum, H. glomeratum, H. lachenalii, H. maculatum, H. murorum, H. pilosella, H. piloselloides, H. sabaudum, H. scouleri, H. ×stoloniflorum, H. triste, H. umbellatum	H. aurantiacum, H. caespitosum, H. flagellare, H. ×floribundum, H. glomeratum, H. lachenalii, H. longiberbe, H. maculatum, H. murorum, H. pilosella, H. piloselloides, H. sabaudum, H. scouleri, H. ×stoloniflorum, H. triste, H. umbellatum
Web links	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	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Hieracium albiflorum

long-bearded hawkweed

white hawkweed, white-flowered hawkweed

Habit

Perennial herbs with milky juice, the stems 3-6 dm. tall, sub-glabrous or with a few long bristles.

Perennial from fibrous roots and a short rhizome, 3-13 dm. tall, a few long hairs on the lower stem, with milky juice.

Leaves

: Leaves alternate, several, the lowermost reduced and early-deciduous, those next above the largest, up to 12 cm. long and 3 cm. wide, the middle ones well developed and only gradually reduced upward;

leaves thin, often toothed, with bristly hairs on the margins, but sparsely hairy to glabrous on the surfaces.

Basal and lower cauline leaves persistent and tufted, mostly entire, 4-17 cm. long including the short petiole, and 1.2-4.5 cm. wide; middle and upper leaves sessile and reduced; stellate hairs wanting.

Flowers

Heads few to several in a flat-topped inflorescence;

involucre 9-11 mm.high, with fine, stellate hairs and a few long bristles;

corollas all ligulate, yellow

Heads several to many in an open inflorescence, on slender peduncles;

involucre 6-11 mm. high, narrow, blackish-green, nearly glabrous;

corollas 13-34, all ligulate and white;

pappus of whitish capillary bristles.

Fruits

Achene.

Achenes ribbed and grooved longitudinally.

Hieracium longiberbe

Hieracium albiflorum

Flowering time

June-July

June-September

Habitat

Dry rocky slopes and ledges.

Open woods from low to middle elevations.

Distribution

Occurring in the Columbia River Gorge in Washington; south-central Washington to adjacent north-central Oregon; endemic to the Columbia River Gorge.

[WildflowerSearch map]

[BONAP county map]

Widely distributed in forested areas on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains, northern Great Plains, Great Lakes region, and eastern Canada.

[WildflowerSearch map]

[BONAP county map]

Origin

Native

Conservation status

Not of concern

Sibling taxa