Crepis vesicaria subsp. taraxacifolia (Thuill.)Thuill., Asteraceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Crepis taraxacifolia Thuill.; Crepis vesicaria subsp. haenseleri (Boiss. ex DC.) P. D. Sell

Common name(s): [more details]

English: beaked hawk's-beard

Habit:  herb

Description:  "Annual or biennial. Stems erect or ascending, branching, ribbed to grooved, 15-75-(100) cm tall; hairs both white, slender, crinkly, subappressed, and red-based, stout, straight, spreading. Rosette and lower stem leaves thick, petiolate, oblong to oblanceolate, usually deeply runcinately 1-2-pinnatifid, rarely simple and shallowly pinnatifid or toothed, (7)-10-20-(35) x (2)-4-8-(12) cm; hairs pale, 0.2-0.5 mm long, on both surfaces and margins; lobes slightly recurved, toothed or divided. Stem leaves similar, deeply pinnatisect to not lobed, toothed, sessile, subauriculate or lobed at base. Capitula campanulate; buds erect. Involucral bracts with pale subappressed cobwebby hairs and often dark, spreading glandular hairs on outer surface, and fine appressed straight hairs on inner surface; outer bracts 6-12, lanceolate to ovate-lanceolate, ?-1/2 length of inner bracts; inner bracts lanceolate, not keeled, (6)-9-12 mm long, with pale to scarious glabrous margins. Receptacle areoles with raised ciliate margins. Corolla yellow, sometimes with red stripe on outer face of ligule. Achenes brown, 10-ribbed, fusiform, scabrid, all long-beaked, 6-9 mm long. Pappus bristles in 1-(2) rows, fine, white"  (Webb et al., 1988; p. 324).

Habitat/ecology:  In New Zealand, "roadsides, railway yards, waste land, arable land"  (Webb et al., 1988; p. 324).

Propagation:  Seed

Native range:  Europe and northern Africa (GRIN).

Presence:

Pacific
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
State of Hawaii Hawaiian Islands	Hawai‘i (Big) Island	introduced invasive	Staples, George W./Imada, Clyde T./Herbst, Derral R. (2002) (p. 5) Voucher cited: L. Yoshida 79.099 (BISH)

Pacific Rim
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Canada Province of British Columbia	Canada (British Columbia)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2011)
New Zealand New Zealand	New Zealand (country)	introduced invasive	Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 324)
United States (west coast) United States (west coast states)	USA (Oregon)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2011)
United States (west coast) United States (west coast states)	USA (Washington)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2011)

Also reported from
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
United States (continental except west coast) United States (other states)	United States (other states)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2011)

Additional information:
Additional online information about Crepis vesicaria is available from the Hawaiian Ecosystems at Risk project (HEAR).

Information about Crepis vesicaria as a weed (worldwide references) may be available from the Global Compendium of Weeds (GCW).

Taxonomic information about Crepis vesicaria may be available from the Germplasm Resources Information Network (GRIN).

References:

Staples, George W./Imada, Clyde T./Herbst, Derral R. 2002. New Hawaiian plant records for 2000. In: Evenhuis, Neal L. and Eldredge, Lucius G., eds. Records of the Hawaii Biological Survey for 2000. Part 1: Articles. Bishop Museum Occasional Papers. 68:3-18.

U.S. Dept. Agr., Agr. Res. Serv. 2011. National Genetic Resources Program. Germplasm Resources Information Network (GRIN). Online searchable database.

U.S. Dept. Agr., Nat. Res. Cons. Serv. 2011. The PLANTS Database. National Plant Data Center, Baton Rouge, LA 70874-4490 USA.

Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. 1988. Flora of New Zealand, Volume IV: Naturalised pteridophytes, gymnosperms, dicotyledons. Botany Division, DSIR, Christchurch. 1365 pp.