Pacific Island Ecosystems at Risk (PIER)

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Cyperus sanguinolentus
Vahl, Cyperaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Pycreus sanguinolentus (Vahl) Nees

Common name(s): [more details]

Chinese: hong lin bian suo

English: purple-glume flat sedge

Habit:  sedge

Description:  "Annuals with fibrous roots or perennials with short rhizomes; culms tufted, forming small clumps 5-60 cm tall.  Leaves basal, shorter than to slightly longer than the culm, 0.5-2 mm wide, apex acute; sheaths brown.  Inflorescences umbelliform or occasionally contracted into a more or less lobed, head-like, umbelliform cluster, rays 2-5, 1-5 cm long, spikes densely bearing 4-20 spikelets; involucral bracts 3-4, unequal, the lower ones longer than the inflorescence; spikelets 10-24-flowered, oblong-elliptic, flattened, 6-15 mm long, 2-2.5 mm wide, obtuse, rachilla not winged; glumes dark purple to brownish black with broad pale margins, thick, membranous, ovate, 1.8-2 mm long, apex obtuse, the keel green, 3-nerved; stamens 2-3; stigmas 2.  Achenes dark brown, obovate to obovate-orbicular, lenticular, 1-1.3 mm long, contracted to a short-acuminate apex"  (Wagner et al., 1999; p. 1427).

Habitat/ecology:  In Hawai‘i, "naturalized in wet sites, 910-920 m" (Wagner et al., 1999; p. 1427).  In China (native), "sparse forest margins, grasslands on mountain slopes, meadows, swamps, lake margins, sunny places at river margins or shallow water, valleys, wet places along trails, field margins, old fields; below 100-3400 m"  (Flora of China online).

Propagation:  Seed

Native range:  "Native to warm parts of the Old World" (Wagner et al., 1999; p. 1427). Africa, Asia and Australia (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
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1427, 1901)
As Pycreus sanguinolentus Voucher cited: Degener 20251 (BISH)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
Frohlich, Danielle/Lau, Alex (2008) (p. 5)
"Wet, disturbed grass and sedge area". Voucher cited: S. Ching USArmy 55 (BISH)
Papua New Guinea
Papua New Guinea (eastern New Guinea Island)
Papua New Guinea (eastern New Guinea Island) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Philippines
Philippine Islands
Philippine Islands native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Philippines
Philippine Islands
Philippine Islands   Merrill, Elmer D. (1925) (p. 110)
In open wet places at low and medium altitudes, ascending to 1,600 m.
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Australia
Australia (continental)
Australia (continental) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
South Australia, Tasmania, Victoria, Western Australia
Australia
Australia (continental)
New South Wales native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Australia
Australia (continental)
Queensland native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Cambodia
Cambodia
Cambodia (Kingdom of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
China
China
China (People's Republic of) native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
As Pycreus sanguinolentus (Vahl) Nees ex C. B. Clarke
China
China
Hong Kong native
Wu, Te-lin (2001) (p. 318)
As Pycreus sanguinolentus (Vahl) Nees. In paddy fields and grassland.
Indonesia
Indonesia
Indonesia (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Japan
Japan
Japan (country) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Hokkaido, Honshu, Kyushu, Shikoku
North Korea
North Korea
North Korea (Democratic People's Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
South Korea
South Korea
South Korea (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Malaysia
Malaysia
Malaysia (country of) 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. 190)
"A weedy grassy plant of wet waste places, about lake and swamp margins, and in wet pastures".
Taiwan
Taiwan Island
Taiwan Island native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
As Pycreus sanguinolentus (Vahl) Nees ex C. B. Clarke
Thailand
Thailand
Thailand (Kingdom of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Vietnam
Vietnam
Vietnam (Socialist 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
United States (continental except west coast)
United States (other states)
United States (other states) introduced
invasive
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Alabama, Georgia, Louisiana, Mississippi
Naturalized


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

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This page was created on 11 MAR 2007 and was last updated on 20 MAR 2013.