Cryptotaenia canadensis (L.) DC., Apiaceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Deringa canadensis (L.) Kuntze

Common name(s): [more details]

English: Canadian honewort, honewort, white chervil

Habit:  herb

Description:  "Plants slender, 3-12 dm tall.  Basal and lower cauline leaves ternately compound, deltate, 2-10 cm wide, the leaflets obovate to rhombic-obovate, margins doubly serrate, the teeth mucronate, apex obtuse to acuminate, base cuneate; upper cauline leaves reduced, the leaflets narrow, petioles usually longer than blades, 7-20 cm long.  Rays 2-7, slender, stiffly ascending, 1-6 cm long, pedicels 2-10, ascending, 2-35 mm long.  Fruit linear to ovoid-oblong, 3.5-8 mm long, 1-3 mm wide, mericarps readily separating" (Wagner et al., 1999; p. 203).

Habitat/ecology:  In Hawai‘i, "occasionally cultivated and naturalized" (Wagner et al., 1999; p. 203).

Propagation:  Seed

Native range:  North America and eastern Asia (Wagner et al., 1999; p. 203).

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 cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 203)
State of Hawaii Hawaiian Islands	Kaua‘i Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 203)
State of Hawaii Hawaiian Islands	Maui Island	introduced invasive	Oppenheimer, Hank L./Meidell, J. Scott/Bartlett, R. T. (1999) (p. 7) Voucher cited: Oppenheimer H19801 (BISH)
State of Hawaii Hawaiian Islands	Moloka‘i Island	introduced invasive	Oppenheimer, Hank L./Meidell, J. Scott/Bartlett, R. T. (1999) (p. 7) Voucher cited: Oppenheimer H99701 (BISH)
State of Hawaii Hawaiian Islands	O‘ahu Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 203) Voucher cited: Pope 1271 (BISH)

Pacific Rim
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Canada Canada	Canada (country)	native	U.S. Dept. Agr., Agr. Res. 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)	native	U.S. Dept. Agr., Agr. Res. Serv. (2011)

Comments:  Reported as possibly an invasive plant in the Hawaiian Islands per Staples et al., 2000.

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

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

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

References:

Oppenheimer, Hank L./Meidell, J. Scott/Bartlett, R. T. 1999. New plant records for Maui and Moloka‘i. In: Evenhuis, Neal L. and Eldredge, Lucius G., eds. Records of the Hawaii Biological Survey for 1998. Part 2: Notes. Bishop Museum Occasional Papers. 59:7-11.

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.

Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. 1999. Manual of the flowering plants of Hawaii. Revised edition. Bernice P. Bishop Museum special publication. University of Hawai‘i Press/Bishop Museum Press, Honolulu. 1919 pp. (two volumes).