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devil's paintbrush, king-devil, orange hawkweed

mouse-ear hawkweed

Habit Plants 15–60 cm; taprooted, stoloniferous. Plants 4–35 cm; taprooted, stoloniferous.
Stems

erect; simple, pilose-hispid, usually also stipitate-glandular, tomentulose distally.

simple, tomentulose and lightly stipitate-glandular throughout or only distally, sometimes pilose proximally.

Leaves

basal, sometimes 1 near stem base, oblanceolate, 5–20 cm;

margins entire;

tips acute or obtuse;

surfaces pilose-setose;

petioles short, winged.

basal or occasionally 1 or 2 cauline near bases, oblanceolate, 2–10+ cm, bases attenuate;

margins entire;

surfaces glabrous or pilose-setose, sometimes tomentulose below;

petioles short, winged.

Inflorescences

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

in raceme- or panicle-like arrays.

Involucres

campanulate in flower; ovoid in fruit, 6–8 mm.

campanulate in flower; ovoid in fruit, 7–9 mm.

Florets

25–100+;

ligules 10–15 mm; reddish orange, drying purplish.

60–120+;

ligules 10–15 mm, yellow.

Phyllaries

linear-lanceolate;

surfaces blackish stipitate-glandular, usually setose-hispid; inner 13–30; outer > inner.

linear-lanceolate;

surfaces densely stipitate-glandular with black hairs, tomentulose; inner 18–30+; outer gradually shorter.

Fruits

columnar, 1.2–2 mm, dark brown.

columnar, 1.5–2 mm, dark brown.

Heads

1(2–3).

2n

=18, 27, 36, 45, 54, 63, 72.

=18, 36, 45, 54, 63.

Hieracium aurantiacum

Hieracium pilosella

Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
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.

Grasslands, roadsides, lawns, disturbed areas. Flowering May–Jun. 0–300 m. Casc, WV. WA; widely scattered in North America; Europe. Exotic.

Source Flora of Oregon, volume 2, page 288
Kenton Chambers
Flora of Oregon, volume 2, page 290
Kenton Chambers
Sibling taxa
H. albiflorum, H. bolanderi, H. caespitosum, H. greenei, H. horridum, H. lachenalii, H. longiberbe, H. murorum, H. parryi, H. pilosella, H. piloselloides, H. sabaudum, H. scouleri, H. triste, H. umbellatum
H. albiflorum, H. aurantiacum, H. bolanderi, H. caespitosum, H. greenei, H. horridum, H. lachenalii, H. longiberbe, H. murorum, H. parryi, H. piloselloides, H. sabaudum, H. scouleri, H. triste, H. umbellatum
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