UW Burke Herbarium species comparison

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Hieracium scouleri

Hieracium lachenalii

hound-tongue hawkweed, Scouler's hawkweed

common hawkweed, English hawkweed, European hawkweed
Habit Perennial herbs with milky juice from a short rhizome with fibrous roots; stems 3-10 dm. tall; herbage bristly below and often glaucous above. Perennials with milky juice from a short rhizome, the stems 30-60 cm. tall, with stiff hairs below and stellate-pubescence and stalked glands above.
Leaves

Basal and lower cauline leaves 5-20 cm. long and 1-3.5 cm. wide, entire, the short petiole winged;

leaves reduced and becoming sessile upward.

Leaves mostly basal, lance-elliptic to lanceolate, entire or more or less dentate, 5-10 cm. long and 1-5 cm. wide, the bases usually wedge-shaped;

cauline leaves often mottled with purple.
Flowers

Achene terete, narrowed toward the base, ribbed.

Heads 3-9 in a flat-topped inflorescence, the peduncles and involucres stellate-pubescent and stipitate-glandular;

involucres 8-10 mm. high, the bracts pointed;

flowers 40-80, all ligulate, yellow, 13-18 mm. long;

pappus of straw-colored, capillary bristles.
Fruits

Achenes columnar, 2.5-3 mm. long.

Hieracium scouleri

Hieracium lachenalii
Flowering time June-August June-August
Habitat Mostly dry places in open woods, from foothills to middle elevations in the mountains. Open forest, fields, shores, wastelots, and other disturbed areas generally at low to middle elevations.
Distribution
Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Alberta, Montana, Wyoming, and Utah.
[WildflowerSearch map]
[BONAP county map]
Occurring west of the Cascades crest in Washington; British Columbia to northern Oregon; also in eastern North America.
[WildflowerSearch map]
[BONAP county map]
Origin Native Introduced from Europe
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. longiberbe, H. maculatum, H. murorum, H. pilosella, H. piloselloides, H. sabaudum, H. ×stoloniflorum, H. triste, H. umbellatum
H. albiflorum, H. aurantiacum, H. caespitosum, H. flagellare, H. ×floribundum, H. glomeratum, H. longiberbe, H. maculatum, H. murorum, H. pilosella, H. piloselloides, H. sabaudum, H. scouleri, H. ×stoloniflorum, H. triste, H. umbellatum
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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