Burke: Crepis tectorum vs. Crepis setosa

	Crepis tectorum	Crepis setosa
	annual hawksbeard, narrow leaf hawksbeard, rooftop hawksbeard	bristly hawksbeard, rough hawksbeard
Habit	Glabrous annual, 1-10 dm. tall, with milky juice.	Annuals with shallow taproots, the stems single, 8-80 cm. tall, simple or sparingly branched, with coarse, yellowish bristles.
Leaves	Basal leaves petiolate, the blade lanceolate or oblanceolate, finely toothed to pinnately parted, up to 15 cm. long and 4 cm. wide; reduced cauline leaves sessile and auriculate, linear, often involute.	Leaves alternate, the basal petiolate, the blades oblanceolate to lyrate, 5-30 cm. long and 1-8 cm. wide, the margins dentate to pinnately lobed; cauline leaves lanceolate, the bases saggitate, the margins dentate or laciniate.
Flowers	Heads several to numerous, 30-70 flowered; involucre 6-9 mm. high, its inner bracts 12-15, with fine hairs and sometimes with stalked glands as well, the outer bracts about one-third as long; corollas all ligulate, yellow.	Inflorescence a panicle with 10-20 heads; involucral bracts 12-16, 6-7 mm. long, strongly keeled and thickened, covered with coarse bristles, the margins green to yellowish, the tips acuminate, with 10-14 linear bractlets 2-4 mm. long; flowers 10-20, the corollas yellow, strap-shaped, 8-10 mm. long; pappus white, fine and soft.
Fruits	Achenes 2.5-4.5 mm. long, dark reddish-brown, spindle-shaped, with 10 ribs.	Achene reddish-brown, spindle-shaped, 3-5 mm. long, beaked.

	Crepis tectorum	Crepis setosa
Flowering time	June-August	June-August
Habitat	Roadsides, fields, ditches, wastelots, and other disturbed, open areas.	Roadsides, fields, ditches, wastelots, and other disturbed open areas at low elevations.
Distribution	Occurring in scattered locations on both sides of the Cascades crest in Washington; Alaska to California, east across the northern regions of the U.S. and Canada to the Atlantic Coast. [WildflowerSearch map] [BONAP county map]	Occurring west of the Cascades crest in southwestern Washington; southwestern British Columbia to California, also in Montana and eastern U.S. [WildflowerSearch map] [BONAP county map]
Origin	Introduced from Europe	Introduced
Conservation status	Not of concern	Not of concern
Sibling taxa	C. acuminata, C. atribarba, C. bakeri, C. barbigera, C. capillaris, C. intermedia, C. modocensis, C. nicaeensis, C. occidentalis, C. runcinata, C. setosa	C. acuminata, C. atribarba, C. bakeri, C. barbigera, C. capillaris, C. intermedia, C. modocensis, C. nicaeensis, C. occidentalis, C. runcinata, C. tectorum
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, 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 WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Crepis setosa

annual hawksbeard, narrow leaf hawksbeard, rooftop hawksbeard

bristly hawksbeard, rough hawksbeard

Habit

Glabrous annual, 1-10 dm. tall, with milky juice.

Annuals with shallow taproots, the stems single, 8-80 cm. tall, simple or sparingly branched, with coarse, yellowish bristles.

Leaves

Basal leaves petiolate, the blade lanceolate or oblanceolate, finely toothed to pinnately parted, up to 15 cm. long and 4 cm. wide; reduced cauline leaves sessile and auriculate, linear, often involute.

Leaves alternate, the basal petiolate, the blades oblanceolate to lyrate, 5-30 cm. long and 1-8 cm. wide, the margins dentate to pinnately lobed;

cauline leaves lanceolate, the bases saggitate, the margins dentate or laciniate.

Flowers

Heads several to numerous, 30-70 flowered;

involucre 6-9 mm. high, its inner bracts 12-15, with fine hairs and sometimes with stalked glands as well, the outer bracts about one-third as long;

corollas all ligulate, yellow.

Inflorescence a panicle with 10-20 heads;

involucral bracts 12-16, 6-7 mm. long, strongly keeled and thickened, covered with coarse bristles, the margins green to yellowish, the tips acuminate, with 10-14 linear bractlets 2-4 mm. long;

flowers 10-20, the corollas yellow, strap-shaped, 8-10 mm. long;

pappus white, fine and soft.

Fruits

Achenes 2.5-4.5 mm. long, dark reddish-brown, spindle-shaped, with 10 ribs.

Achene reddish-brown, spindle-shaped, 3-5 mm. long, beaked.

Crepis tectorum

Crepis setosa

Flowering time

June-August

Habitat

Roadsides, fields, ditches, wastelots, and other disturbed, open areas.

Roadsides, fields, ditches, wastelots, and other disturbed open areas at low elevations.

Distribution

Occurring in scattered locations on both sides of the Cascades crest in Washington; Alaska to California, east across the northern regions of the U.S. and Canada to the Atlantic Coast.

[WildflowerSearch map]

[BONAP county map]