Hieracium aurantiacum |
Hieracium horridum |
|
---|---|---|
devil's paintbrush, king-devil, orange hawkweed |
shaggy hawkweed |
|
Habit | Plants 15–60 cm; taprooted, stoloniferous. | Plants 10–30 cm; taprooted. |
Stems | erect; simple, pilose-hispid, usually also stipitate-glandular, tomentulose distally. |
simple or branched, densely pilose-villous. |
Leaves | basal, sometimes 1 near stem base, oblanceolate, 5–20 cm; margins entire; tips acute or obtuse; surfaces pilose-setose; petioles short, winged. |
basal and cauline, broadly elliptic to oblanceolate, 2–15 cm; margins entire; tips acute or obtuse; surfaces densely pilose-villous; petioles winged. |
Inflorescences | raceme- or panicle-like arrays, bracteate or not. |
panicle-like arrays, bracteate. |
Involucres | campanulate in flower; ovoid in fruit, 6–8 mm. |
± cylindric in flower and fruit, 6–9 mm. |
Florets | 25–100+; ligules 10–15 mm; reddish orange, drying purplish. |
6–15; ligules 8–9 mm, yellow. |
Phyllaries | linear-lanceolate; surfaces blackish stipitate-glandular, usually setose-hispid; inner 13–30; outer > inner. |
lanceolate; surfaces densely pilose-villous; inner 12–15; outer > inner. |
Fruits | columnar, 1.2–2 mm, dark brown. |
columnar, 3–3.5 mm; reddish brown. |
2n | =18, 27, 36, 45, 54, 63, 72. |
=18. |
Hieracium aurantiacum |
Hieracium horridum |
|
Distribution | ||
Discussion | Disturbed areas, roadsides, clearcuts, riverbanks, pastures. Flowering Jun–Aug. 100–1400 m. BW, Casc, CR, ECas. CA, ID, NV, WA; scattered in North America; Europe. Exotic. Hieracium aurantiacum is a conspicuous and well-known weed over much of the United States and southern Canada. Its scattered distribution in Oregon indicates an ability to disperse by seed, and once established it may persist and spread by both seeds and stolons. |
Alpine rock outcrops, gravelly slopes, meadows. Flowering Jun–Oct. 1500–2300 m. Casc. CA, NV. Native. |
Source | Flora of Oregon, volume 2, page 288 Kenton Chambers |
Flora of Oregon, volume 2, page 289 Kenton Chambers |
Sibling taxa | ||
Web links |