Pacific Island Ecosystems at Risk (PIER)

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Bothriochloa pertusa
(L.) A.Camus, Poaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Andropogon pertusus (L.) Willd.

Common name(s): [more details]

Chinese: kong ying cao

English: hurricane grass, Indian couch grass, pitted beardgrass, pitted bluestem

Spanish: comagueyana

Habit:  grass

Description:  "Sprawling perennials, rhizomes contracted; culms 30-100 cm tall, hollow, freely branching, glabrous except upwardly bearded at nodes, rooting at lower nodes.  Sheaths keeled, hirsute; ligule a ciliate membrane, 0.7-1.2 mm long; blades 3-4 mm wide, with scattered, elongate, papillose-based hairs along margins and above ligule.  Inflorescences terminal, often purplish, flabellate, 3-5 cm long, peduncles exserted up to 12 cm from the subglabrous, bladeless upper sheath, glabrous or slightly bearded at apex, consisting of several ascending racemes, racemosely arranged along a short axis, pedicels of pedicellate spikelet ca. 3 mm long, densely villous, flattened; pedicellate spikelet 3-4 mm long, sterile or sometimes staminate, often purple-tinged, scaberulous; sessile spikelet ca. 5 mm long; first glume subcoriaceous, with a conspicuous pit in the middle, villous on lower 1/2, scabrous on upper 1/2, attenuate, often bidentate at apex, second glume ca. 5 mm long, submembranous, keeled, minutely puberulent at apex, otherwise glabrous, apiculate; first (sterile) lemma 2.5-2.7 mm long, hyaline, ciliate on upper margins, fertile lemma reduced to a slender, geniculate, reddish brown awn 15-20 mm long; palea absent.  Caryopsis ovoid to ellipsoid, 1.5-2 mm long."  (Wagner et al., 1999; p. 1503).

Description from GrassBase.

Habitat/ecology:  In Hawai‘i, "naturalized usually in open, disturbed sites such as pastures, savannas, and along roadsides, 5-1,340 m" (Wagner et al., 1999; p. 1503). In New Caledonia, "commun en pâturages de la côte Ouest" (MacKee, 1994; p. 57).

Propagation:  Seed

Native range:  Paleotropics, now naturalized in the neotropics (Wagner et al., 1999; p. 1503).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Tinian Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1985) (voucher ID: PTBG 41078)
Taxon name on voucher: Bothriochloa pertusa (L.) A. Camus
Cook Islands
Southern Cook Islands
Aitutaki Atoll   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2002) (voucher ID: PTBG 41391)
Taxon name on voucher: Bothriochloa pertusa
French Polynesia
Marquesas Islands
Nuku Hiva (Nukahiva) Island introduced
invasive
Lorence, David H./Wagner, Warren L. (2013)
French Polynesia
Marquesas Islands
Nuku Hiva (Nukahiva) Island introduced
invasive
Florence, J./Chevillotte, H./Ollier, C./Meyer, J.-Y. (2013)
Voucher cited: D.H. Lorence & W.L. Wagner 6074 (PAP)
French Polynesia
Marquesas Islands
Nuku Hiva (Nukahiva) Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1988) (voucher ID: PTBG 6616)
Taxon name on voucher: Bothriochloa pertusa
Guam
Guam Island
Guam Island   Donnegan, Joseph A./Butler, Sarah L./Grabowiecki, Walter/Hiserote, Bruce A./Limtiaco, David (2004) (p. 22)
State of Hawaii
Hawaiian Islands
Hawai‘i (Big) Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1503)
State of Hawaii
Hawaiian Islands
Kaho‘olawe Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1503)
State of Hawaii
Hawaiian Islands
Kaua‘i Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1503)
State of Hawaii
Hawaiian Islands
Lāna‘i Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1503)
State of Hawaii
Hawaiian Islands
Maui Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1503)
State of Hawaii
Hawaiian Islands
Moloka‘i Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1503)
State of Hawaii
Hawaiian Islands
Ni‘ihau Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1503)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 1503)
Voucher cited: Hosaka 1378 (BISH)
New Caledonia
Matthew Island
Île Matthew introduced
MacKee, H. S. (1994) (p. 57)
Voucher cited: Veillon 3411
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
invasive
Gargominy, Oliver/Bouchet, Philipe/Pascal, Michel/Jaffre, Tanguy/Tourneu, Jean-Christophe (1996) (p. 380)
Commune en pâturages de la côte Ouest.
New Caledonia
New Caledonia Archipelago
Île Grande Terre introduced
cultivated
MacKee, H. S. (1994) (p. 57)
Voucher cited: Däniker 1678
United States (other Pacific offshore islands)
Midway Atoll
Midway Atoll introduced
invasive
Starr, Forest/Martz, Kim (2000) (p. 11)
Voucher cited: Starr & Martz 990507-4 (BISH)
United States (other Pacific offshore islands)
Midway Atoll
Sand Island introduced
invasive
Starr, Forest/Starr, Kim/Loope, Lloyd (2008) (pp. B-4)
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
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)
Grassy hills, disturbed ground; 1200-1500 m. Guangdong, Sichuan, Yunnan.
China
China
Hong Kong native
Wu, Te-lin (2001) (p. 328)
In grasses of hillslopes.
Indonesia
Indonesia
Indonesia (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)
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)


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This page was created on 23 APR 2005 and was last updated on 30 NOV 2008.