OregonFlora: Hieracium longiberbe

	Hieracium longiberbe
	long-bearded hawkweed
Habit	Plants 10–60 cm; taprooted.
Stems	simple or branched, glabrous or pilose.
Leaves	cauline, rarely a few basal early, spatulate to oblanceolate, 5–15 cm, bases attenuate; margins entire or rarely denticulate; surfaces glabrous to lightly or densely pilose-setose, usually sessile.
Inflorescences	panicle- or raceme-like arrays, bracteate or not.
Involucres	campanulate in flower; ovoid in fruit, 7–10 mm.
Florets	12–30; ligules 10–15 mm, yellow.
Phyllaries	linear-lanceolate; surfaces densely long-setose with brown or black hairs; inner 10–16; outer gradually shorter.
Fruits	columnar, 3–4 mm, brown.

	Hieracium longiberbe
Distribution	[WildflowerSearch map] [BONAP county map]
Discussion	Rocky slopes and cliffs, open woods. Flowering May–Aug. 0–600 m. Casc. WA. Native. This species is limited to the Columbia River Gorge and its immediate vicinity. Its distinctive, densely pilose-setose involucres, lacking either tomentulose or stipitate-glandular pubescence, distinguish it from the closely allied species Hieracium scouleri, a widespread taxon whose numerous pubescence variants are not correlated with any particular geographical areas. Hieracium longiberbe and H. scouleri were shown to be sister taxa in a molecular phylogenetic study by Gaskin and Wilson (2007).
Source	Flora of Oregon, volume 2, page 289 Kenton Chambers
Sibling taxa	H. albiflorum, H. aurantiacum, H. bolanderi, H. caespitosum, H. greenei, H. horridum, H. lachenalii, H. murorum, H. parryi, H. pilosella, H. piloselloides, H. sabaudum, H. scouleri, 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

Hieracium longiberbe

long-bearded hawkweed

Habit

Plants 10–60 cm; taprooted.

Stems

simple or branched, glabrous or pilose.

Leaves

cauline, rarely a few basal early, spatulate to oblanceolate, 5–15 cm, bases attenuate;

margins entire or rarely denticulate;

surfaces glabrous to lightly or densely pilose-setose, usually sessile.

Inflorescences

panicle- or raceme-like arrays, bracteate or not.

Involucres

campanulate in flower; ovoid in fruit, 7–10 mm.

Florets

12–30;

ligules 10–15 mm, yellow.

Phyllaries

linear-lanceolate;

surfaces densely long-setose with brown or black hairs; inner 10–16; outer gradually shorter.

Fruits

columnar, 3–4 mm, brown.

Hieracium longiberbe

Distribution

[WildflowerSearch map]

[BONAP county map]

Discussion

Rocky slopes and cliffs, open woods. Flowering May–Aug. 0–600 m. Casc. WA. Native.

This species is limited to the Columbia River Gorge and its immediate vicinity. Its distinctive, densely pilose-setose involucres, lacking either tomentulose or stipitate-glandular pubescence, distinguish it from the closely allied species Hieracium scouleri, a widespread taxon whose numerous pubescence variants are not correlated with any particular geographical areas. Hieracium longiberbe and H. scouleri were shown to be sister taxa in a molecular phylogenetic study by Gaskin and Wilson (2007).

Source

Flora of Oregon, volume 2, page 289
Kenton Chambers

Sibling taxa