Pacific Island Ecosystems at Risk (PIER)

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Carex longii
Mackenzie, Cyperaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

English: Long's sedge

Habit:  sedge

Description:  "Carex longii can be distinguished from other species of Carex in the Hawaiian Islands by the terminal moniliform-spicate inflorescence with ascending, closely appressed perigynia and green, herbaceous, prominently veined inner bands of the leaf sheaths. It can be characterized as follows: Densely tufted perennial, forming small to medium sized clumps; culms sharply triangular, (15-) 30-80 (-120) cm tall, scabrous on angles just below the inflorescence. Leaves linear, flat, usually shorter than the culms, 1.5-4 mm wide; sheaths pale green, closely surrounding the culm, the inner band green, herbaceous, prominently veined. Inflorescence a narrowly ovoid to oblong-ovoid, head- like cluster of (2-) 3-10 (-11) spikes, the axis usually obscured, the spikes silvery green to silvery brown, ovoid, 7-11 cm long, 5-8 mm wide, gynecandrous, sessile; bracts short; pistillate glumes pale brown or reddish brown, membranaceous, ovate, shorter and narrower than their perigynia, the apex obtuse to subacute. Perigynium membranaceous, pale brown, ascending, the beaks appressed, elliptic to rhombic, widest near the middle, 3-4.5 mm long, 1.7-2.5 mm wide, prominently several nerved, margins narrowly winged, scabrous toward the apex, the apex gradually narrowed to a beak ca. 1 mm long, the beak deeply bifid on dorsal side, shallowly 2-toothed on ventral side; stigmas 2. Achenes ovoid, lenticular, substipitate. Literature used in preparing description was Correll & Johnston (1970), Standley & Steyermark (1958), and Fernald (1950)." (Strong & Wagner, 1997).

Habitat/ecology:  (no habitat/ecology info known by PIER)

Propagation:  Seed

Native range:  "Carex longii is native to North America, from Canada (Great Lakes Region and the Maritime Provinces) to New England , south to Florida and Texas. Sporadic throughout Mexico, Central America, the West Indies, and Andean South America" (Strong & Wagner, 1997).

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
Strong, Mark T./Wagner, Warren L. (1997) (pp. 37-39)
Vouchers cited: Rubtzoff 2720 (US), Carlson s.n. (BISH), Herbst 1705 (BISH), Stemmermann 7106 (BISH, US), Wagner et al. 5955 (BISH, US), Wagner et al. 5958 (BISH, US)
State of Hawaii
Hawaiian Islands
Maui Island introduced
invasive
Strong, Mark T./Wagner, Warren L. (1997) (pp. 37-39)
East Maui. Vouchers cited: Hobdy 1094 (BISH), Canfield & Stemmermann 791 (MICH)
State of Hawaii
Hawaiian Islands
Moloka‘i Island introduced
invasive
Oppenheimer, Hank (2010) (p. 35)
Voucher cited: Oppenheimer H90823 (BISH, PTBG)
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Central America
Central America (Pacific rim)
Costa Rica (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Central America
Central America (Pacific rim)
Guatemala (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Mexico
Mexico
Mexico (United Mexican States) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
New Zealand
New Zealand
New Zealand (country) introduced
invasive
Healy, A. J./Edgar, E. (1980) (p. 158)
Voucher cited: Hikurangi, R. Cooper, R. Mason and N. Moar (AK 35898a)
South America (Pacific rim)
South America (Pacific rim)
Colombia (Republic of) native
U.S. Dept. Agr., Agr. Res. 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
Canada (except British Colombia)
Canada
Canada (country) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Nova Scotia, Ontario
United States (continental except west coast)
United States (other states)
United States (other states) native
U.S. Dept. Agr., Agr. Res. 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 16 JAN 2004 and was last updated on 12 OCT 2006.