Pacific Island Ecosystems at Risk (PIER)

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Torilis arvensis
(Huds.) Link, Apiaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  High risk, score: 9 (Go to the risk assessment)

Other Latin names:  Caucalis elongata Hoffmanns. & Link; Caucalis purpurea Ten.; Torilis heterophylla Guss.; Torilis homophylla Stapf & Wettst.; Torilis neglecta Spreng.; Torilis radiata Moench

Common name(s): [more details]

English: Canada hedgeparsley, hedge parsley, spreading hedge-parsley

Habit:  herb

Description:  "Erect annual. Stems densely hairy above but glabrous or sparsely hairy near base, solid, striate, 20-60-(100) cm high, sometimes purple tinged; hairs deflexed. Basal leaves densely hairy above and below, 2-pinnate, petiolate; ultimate segments ovate to lanceolate, pinnatifid and serrate, 15-45 mm long, sessile or shortly petiolulate; stem leaves similar to basal, but 1-pinnate or pinnately 3-foliolate toward apex with less divided segments. Umbels 1-4-(5) cm in diameter, long-pedunculate, usually terminal; rays (2)-3-9, 5-20-(30) mm long; bracts 0-1, linear; bracteoles 5-6, linear. Flowers few to numerous, white or tinged pink,c. 2 mm in diameter., irregular. Fruit. ovoid, 3.5-4.5 mm long; all mericarps spinous; spines curved upward, thickened at tip"  (Webb et al., 1988; 138).

Habitat/ecology:  In New Zealand, "waste places, gardens, pasture, forest margins, coastal habitats"  (Webb et al., 1988; 138).

Propagation:  Seed. The abundant bur-like seeds cling tenaciously to animal fur and clothing.

Native range:  Africa, including the Madeira and Canary Islands; Europe; Asia as far east as Pakistan; naturalized in the Azores and elsewhere (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
Kaua‘i Island introduced
invasive
Staples, George W./Imada, Clyde T./Herbst, Derral R. (2002) (p. 5)
Voucher cited: Hobdy, R.; S. Perlman & S. Gon 3059 (BISH)
State of Hawaii
Hawaiian Islands
Maui Island introduced
invasive
Starr, Forest/Starr, Kim (2012) (p. 87)
East Maui. Voucher cited: Starr 111018-1 (BISH)
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Canada (British Colombia)
Province of British Columbia
Canada (British Columbia) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
New Zealand
New Zealand
New Zealand (country) introduced
invasive
Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 138)
United States (west coast)
United States (west coast states)
USA (Oregon) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (west coast)
United States (west coast states)
USA (California) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
United States (west coast)
United States (west coast states)
USA (Washington) introduced
U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)
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. (2013)


Need more info? Have questions? Comments? Information to contribute? Contact PIER! (pier@hear.org)

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This page was created on 26 DEC 2011 and was last updated on 12 APR 2013.