Pacific Island Ecosystems at Risk (PIER)

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Isachne globosa
(Thunb.) Kuntze, Poaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  Reject, score: 18 (Go to the risk assessment)

Common name(s): [more details]

Chinese: liu ye ruo

Habit:  grass

Description:  "Annual or short-lived perennial; culms 5-60 cm tall, erect or decumbent and rooting at the lower nodes, the internodes cylindrical, hollow, glabrous, the nodes glabrous or pilose.  Sheaths rounded, usually glabrous, one margin ciliate, the collar usually glabrous, sometimes pubescent; ligule 1-3 mm long; blades 2-8 cm long, 4-14 mm wide, lanceolate to ovate-lanceolate, flat, acuminate, scabrous, sometimes pubescent on one or both surfaces, the margin scabrous. Panicle 3-12 cm long, the branches ascending to widely spreading, glabrous or scabrous, the pedicels with glandular spots or bands, the pulvini glabrous.  Spikelets 1.8-2.5 mm long, subglobose, obtuse, green or purplish; lower glume 1.6-2.4 mm long, ovate, obtuse, (5)-7-9 nerved, usually scabrous in the upper half sometimes with a few setae, the margin broadly hyaline; upper glume 1.4-2.1 mm long, slightly shorter than the lower, nearly orbicular, obtuse to emarginate, 7-11-nerved, usually scabrous in the upper half, the margin broadly hyaline; lower floret staminate, nearly membranous, 1.8-2.6 mm long, 0.9-1.3 mm wide, distinctly longer than the upper floret, broadly elliptic, glabrous, grooved on the back; upper floret pistillate, indurate, 1.4-2.4 mm long, 0.9-1.3 mm wide, broadly elliptic to ovate-elliptic, densely puberulent, stigmas purple; anthers 1.2-1.8 mm long; caryopsis suborbicular in outline, plano-convex, 1.0-1.1 mm long, 0.9-1.0 mm wide, dark reddish brown" (Dassanayake, 1994; pp. 265-266).

"Semiprostrate, with erect flowering culms 15-90 cm high; sheaths fairly loose, the leaf blades tapering to a rounded apex, the margins scabrous; panicle compact, 6-8 cm long, the racemes 6-18 mm long; spikelets rounded, the glumes ciliate along margins and nerves" (Smith, 1979; pp. 364-365).

Description from GrassBase.

Habitat/ecology:  In Fiji, "noted at only two localities at very diverse elevations, 800 m and sea level respectively.  At the higher elevation the species was found in open, sunny, swampy ground near a creek" (Smith, 1979; pp. 364-365).  In Sri Lanka, "in marshy habitats, rice fields, stream banks, ditches, from sea level to 1,800 m elevation" (Dassanayake, 1994; pp. 265-266).

Propagation:  Seed

Native range:  Eastern Asia (Smith, 1979; pp. 364-365). Fosberg et al. (1987; p. 45) list as native in Micronesia.

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Federated States of Micronesia
Chuuk Islands
Dublon (Tonowas) Island native
Fosberg, F. R./Sachet, M.-H. (1982) (p. 54)
Var. ciliaris Ohwi; vouchers cited: Hatusima 10710 (FU, isotype), Hosaka 2759 (US, BISH, POM, K, MO, CANB, L)
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island native
Herrera, Katherine/Lorence, David H./Flynn, Timothy/Balick, Michael J. (2010) (p. 58)
Vouchers cited: S.F. Glassman 2741 (BISH), T. Hosokawa 5982 (BISH), M. Takamatsu 1084 (BISH)
Federated States of Micronesia
Yap Islands
Yap (Waqab) Island native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 45)
Federated States of Micronesia
Yap Islands
Yap (Waqab) Island native
Fosberg, F. R./Sachet, M.-H. (1982) (p. 54)
Voucher cited: Kanehira & Hatusima 4353 (KYO)
Fiji
Fiji Islands
Viti Levu Island introduced
invasive
Smith, Albert C. (1979) (pp. 364-365)
Vouchers cited: Greenwood 1178, DA 7597
Palau
Palau (Belau ) (main island group)
Babeldaob Island native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 45)
Palau
Palau (Belau ) (main island group)
Babeldaob Island native
Fosberg, F. R./Sachet, M.-H. (1982) (p. 54)
Vouchers cited: Hosokawa 7387 (US), Kanehira & Hatusima 4548 (KYO)
Palau
Palau (Belau ) (main island group)
Koror (Oreor) Island native
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 45)
Palau
Palau (Belau ) (main island group)
Koror (Oreor) Island native
Fosberg, F. R./Sachet, M.-H. (1982) (p. 54)
Voucher cited: Kanehira & Hatusima 4429 (KYO)
Papua New Guinea
Papua New Guinea (eastern New Guinea Island)
Papua New Guinea (eastern New Guinea Island) native
Henty, E. E. (1969) (p. 114)
Common on wet soil in grassland, garden clearings, etc., from about 3000 to 7000 ft.
Philippines
Philippine Islands
Philippine Islands native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Philippines
Philippine Islands
Philippine Islands native
Merrill, Elmer D. (1925) (p. 59)
In swamps about Lake Lanao, altitude about 650 m.
Solomon Islands
Solomon Islands
Solomon Islands   Swarbrick, John T. (1997) (p. 93)
Solomon Islands
Solomon Islands
Solomon Islands native
Hancock, I. R./Henderson, C. P. (1988) (p. 83)
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)
China
China
China (People's Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
China
China
Hong Kong native
Wu, Te-lin (2001) (p. 339)
On grasslands.
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)
Japan
Ryukyu Islands
Ryukyu Islands native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
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
Edgar, E./Connor, H. (2000) (p. 596)
"Edges of swamps and lake margins, often partly submerged, sometimes in deep gullies, coastal".
Singapore
Singapore
Singapore (Republic of)   Waterhouse, D. F. (1993) (p. 66)
Singapore
Singapore
Singapore (Republic of) uncertain if introduced
invasive
Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 51)
Weed of uncertain origin
Taiwan
Taiwan Island
Taiwan Island native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Thailand
Thailand
Thailand (Kingdom of)   Waterhouse, D. F. (1993) (p. 66)
Vietnam
Vietnam
Vietnam (Socialist Republic of)   Waterhouse, D. F. (1993) (p. 66)

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

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

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

References:

Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. 2009. A checklist of the total vascular plant flora of Singapore: native, naturalised and cultivated species. Raffles Museum of Biodiversity Research, National University of Singapore. 273 pp.

Dassanayake, M. D., gen. ed. 1994. A revised handbook to the flora of Ceylon. Vol VIII. Amerind Pub. Co., New Delhi. 458 pp.

Edgar, E./Connor, H. 2000. Flora of New Zealand, vol. V: Gramineae. Manaaki Whenua Press. .

Fosberg, F. R./Sachet, M.-H. 1982. Micronesian Poaceae: Critical and distributional notes. Micronesica 18(2):45-102.

Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce. 1987. A geographical checklist of the Micronesian monocotyledonae. Micronesica 20:1-126.

Hancock, I. R./Henderson, C. P. 1988. Flora of the Solomon Islands. Research Bulletin No. 7. Ministry of Agriculture and Lands, Honiara. 203 pp.

Henty, E. E. 1969. A manual of the grasses of New Guinea. Department of Forests, Division of Botany, Botany Bull. No. 1. Lae, New Guinea. 215 pp.

Herrera, Katherine/Lorence, David H./Flynn, Timothy/Balick, Michael J. 2010. Checklist of the vascular plants of Pohnpei with local names and uses. Allertonia, in press. National Tropical Botanical Garden, Lawai, Hawai‘i. 146 pp.

Merrill, Elmer D. 1925. An enumeration of Philippine flowering plants, vol. 1 [reprint]. Bureau of Printing, Manila. 463 pp.

Smith, Albert C. 1979. Flora Vitiensis nova: a new flora of Fiji. National Tropical Botanical Garden, Lawai, Kauai, Hawaii. Volume 1. 494 pp.

Swarbrick, John T. 1997. Weeds of the Pacific Islands. Technical paper no. 209. South Pacific Commission, Noumea, New Caledonia. 124 pp.

U.S. Dept. Agr., Agr. Res. Serv. 2013. National Genetic Resources Program. Germplasm Resources Information Network (GRIN). Online searchable database.

Waterhouse, D. F. 1993. The major arthropod pests and weeds of agriculture in Southeast Asia. The Australian Centre for International Agricultural Research, Canberra. 141 pp.

Wu, Te-lin. 2001. Check List of Hong Kong Plants. Hong Kong Herbarium and the South China Institute of Botany. Agriculture, Fisheries and Conservation Department Bulletin 1 (revised). 384 pp.

Zhengyi, Wu/Raven, Peter H./Deyuan, Hong. 2013. Flora of China (online resource).


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This page was created on 1 JAN 1999 and was last updated on 30 NOV 2008.