Pacific Island Ecosystems at Risk (PIER)

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Eustachys petraea
(Sw.) Desv., Poaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Chloris petraea Swartz

Common name(s): [more details]

English: pinewoods fingergrass

Habit:  grass

Description:  "Perennial, often developing stolons.  Culms 20-120 cm tall.  Ligule a short ciliate crown.  Blades flat or folded, mostly 8-20 cm long and 0.8-1.0 cm broad, obtuse at apex.  Panicles with 2-8 erect or erect-spreading branches 4-21 cm long.  Spikelets closely imbricated and widely divergent.  First glume lanceolate, 0.9-1.5 mm long, the second nearly linear, 1.1-1.7 mm long, short-awned from the obtusely lobed apex.  Lemma of perfect (lower) floret ovate-lanceolate, dark brown at maturity, 1.1-2.5 mm long, pilose on upper 1/2-3/4 with short hairs, awnless or mucronate.  Reduced floret cylindrical, truncate, 0.8-1.0 mm long, awnless or mucronate"  (Howard, 1979; p. 83).

Description from GrassBase.

Habitat/ecology:  "Open, exposed site, most frequent on and near the seashore" (Howard, 1979; p. 83).

Propagation:  Seed, locally by stolons.

Native range:  "Southern United States, eastern Mexico and throughout the Antilles to Trinidad and northern South America" (Howard, 1979; p. 83).

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
Rota Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 43)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Rota Island introduced
invasive
Waterhouse, B. M (2003) (pp. 100-101)
Vouchers cited: Fosberg & Moore 58248 (US, BISH, POM, K, MO, BRI), Raulerson 1584 (US), Herbst & Falanruw 6732 (US), Herbst & Falanruw 6690 (US)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Saipan Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 43)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Saipan Island introduced
invasive
Fosberg, F. R./Falanruw, M. V. C. (1975) (pp. 77-78)
Vouchers cited: Fosberg 50547 (US), Fosberg 47715 (US)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Tinian Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 43)
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Tinian Island introduced
invasive
Waterhouse, B. M (2003) (pp. 100-101)
Voucher cited: Fosberg 59888 (US, BISH, BM, TI, BRI, NY)
Federated States of Micronesia
Chuuk Islands
Weno (Moen) Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 43)
Federated States of Micronesia
Chuuk Islands
Weno (Moen) Island introduced
invasive
Waterhouse, B. M (2003) (pp. 100-101)
Voucher cited: Fosberg 60307 (US, BISH, POM, MO)
Federated States of Micronesia
Kosrae Island
Kosrae Island introduced
invasive
Space, James C./Waterhouse, Barbara/Denslow, Julie S./Nelson, Duane/Waguk, Erick E. (2000) (p. Voucher specimen)
Voucher: BMW 5745 (BISH, BRI)
Federated States of Micronesia
Kosrae Island
Kosrae Island introduced
invasive
Lorence, David H./Flynn, Timothy (2010) (p. 10)
Voucher cited: Lorence 10117 (PTBG)
Naturalized
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 43)
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island introduced
invasive
Herrera, Katherine/Lorence, David H./Flynn, Timothy/Balick, Michael J. (2010) (p. 57)
Naturalized
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island introduced
invasive
Waterhouse, B. M (2003) (pp. 100-101)
Voucher cited: Falanruw 3236 (US)
Federated States of Micronesia
Pohnpei Islands
Pohnpei Island introduced
invasive
Fosberg, F. R./Falanruw, M. V. C. (1980) (p. 202)
Voucher cited: Falanruw 3236 (US)
Guam
Guam Island
Guam Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 43)
Guam
Guam Island
Guam Island introduced
invasive
Fosberg, F. R./Falanruw, M. V. C. (1975) (pp. 77-78)
Vouchers cited: Falanruw 1286 (US), Falanruw 956 (US)
Guam
Guam Island
Guam Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1994) (voucher ID: PTBG 22350)
Taxon name on voucher: Eustachys petraea (Sw.) Desv.
State of Hawaii
Hawaiian Islands
French Frigate Shoals introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1513, 1906)
Adventive
Kiribati
Line Islands
Kiritimati (Christmas) Atoll   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1995) (voucher ID: PTBG 38254)
Taxon name on voucher: Eustachys petraea (Sw.) Desv.
Kiribati
Tungaru (Gilbert) Islands
Abemama Atoll introduced
invasive
Space, James C./Imada, Clyde T. (2004) (p. 10)
Voucher: Imada 2003-119 (BISH 697730)
Kiribati
Tungaru (Gilbert) Islands
Butaritari Atoll introduced
invasive
Space, James C./Imada, Clyde T. (2004) (p. 10)
Voucher: Imada 2003-62 (BISH 697677)
Kiribati
Tungaru (Gilbert) Islands
Maiana Atoll introduced
invasive
Space, James C./Imada, Clyde T. (2004) (p. 10)
Voucher: Imada 2003-97 (BISH 697712)
Kiribati
Tungaru (Gilbert) Islands
Makin Island introduced
invasive
Space, James C./Imada, Clyde T. (2004) (p. 10)
Kiribati
Tungaru (Gilbert) Islands
Tarawa Atoll introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 43)
Kiribati
Tungaru (Gilbert) Islands
Tarawa Atoll introduced
invasive
Space, James C./Imada, Clyde T. (2004) (p. 10)
Voucher: Imada 2003-17 (BISH 697632)
Kiribati
Tungaru (Gilbert) Islands
Tarawa Atoll introduced
invasive
Waterhouse, B. M (2003) (pp. 100-101)
Voucher cited: Raulerson 3644 (US)
Marshall Islands
Ralik Chain
Bikini (Pikinni) Atoll introduced
Fosberg, F. R. (1988) (p. 11)
Marshall Islands
Ralik Chain
Kili (Kõle) Atoll introduced
invasive
Vander Velde, Nancy/Vander Velde, Brian (2006) (p. 4)
"Common to abundant; major component of grassy fields, in ruderal areas, around houses".
Marshall Islands
Ralik Chain
Kwajalein (Kuwajleen) Atoll introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 43)
Marshall Islands
Ralik Chain
Kwajalein (Kuwajleen) Atoll introduced
invasive
Whistler, W. A./Steele, O. (1999) (pp. 85-86)
Vouchers cited: Fosberg 48036, Fosberg 48047, Herbst 8888, Herbst 8958, Herbst 8968, Herbst 9005, Herbst 9626, Whistler 11231
Marshall Islands
Ralik Chain
Kwajalein (Kuwajleen) Atoll introduced
invasive
Fosberg, F. R./Falanruw, M. V. C. (1975) (pp. 77-78)
Vouchers cited: Fosberg 48036 (US), Fosberg 48047 (US)
Marshall Islands
Ralik Chain
Wotho (Wõtto) Atoll introduced
invasive
Whistler, W. A./Steele, O. (1999) (pp. 85-86)
Marshall Islands
Ratak Chain
Arno Atoll introduced
invasive
Vander Velde, Nancy/Vander Velde, Brian (2007) (p. 3)
"Abundant; major componant of lawns, some patches in ruderal areas".
Marshall Islands
Ratak Chain
Majuro (Mãjro) Atoll introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 43)
Marshall Islands
Ratak Chain
Majuro (Mãjro) Atoll introduced
invasive
Waterhouse, B. M (2003) (pp. 100-101)
Vouchers cited: Falanruw 3200 (US), Fosberg 58812 (US)
Marshall Islands
Ratak Chain
Majuro (Mãjro) Atoll introduced
invasive
Vander Velde, Nancy (2003) (p. 51)
Marshall Islands
Ratak Chain
Majuro (Mãjro) Atoll introduced
invasive
Fosberg, F. R./Falanruw, M. V. C. (1980) (p. 202)
Vouchers cited: Falanruw 3200 (US), Fosberg 58812 (US)
Marshall Islands
Ratak Chain
Maloelap Atoll   Imada, Clyde (2006)
Marshall Islands
Ratak Chain
Mili (Mile) Atoll introduced
invasive
Vander Velde, Nancy/Vander Velde, Brian (2010) (p. A6)
Abundant; in runway, fields and ruderal areas throughout Mili.
Palau
Palau (Belau ) (main island group)
Angaur (Ngeaur) Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 43)
Palau
Palau (Belau ) (main island group)
Angaur (Ngeaur) Island introduced
invasive
Waterhouse, B. M (2003) (pp. 100-101)
Voucher cited: Canfield 189 (US)
Palau
Palau (Belau ) (main island group)
Angaur (Ngeaur) Island introduced
invasive
Fosberg, F. R./Falanruw, M. V. C. (1980) (p. 202)
Voucher cited: Canfield 189 (US)
Palau
Palau (Belau ) (main island group)
Peleliu (Beliliou) Island   Wagner, W. L./ Herbst, D. R./Weitzman, A./Lorence, D.H. (2013)
United States (other Pacific offshore islands)
Midway Atoll
Eastern Island introduced
invasive
Starr, Forest/Starr, Kim/Loope, Lloyd (2008) (pp. B-8)
United States (other Pacific offshore islands)
Midway Atoll
Midway Atoll introduced
invasive
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1513, 1906)
Adventive
United States (other Pacific offshore islands)
Midway Atoll
Sand Island introduced
invasive
Starr, Forest/Starr, Kim/Loope, Lloyd (2008) (pp. B-8)
United States (other Pacific offshore islands)
Midway Atoll
Spit Island introduced
invasive
Starr, Forest/Starr, Kim/Loope, Lloyd (2008) (pp. B-8)
United States (other Pacific offshore islands)
Wake Islands
Wake Island introduced
invasive
Whistler, W. A./Steele, O. (1999) (pp. 85-86)
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Costa Rica
Costa Rica
Costa Rica (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Honduras
Honduras
Honduras (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)
Nicaragua
Nicaragua
Nicaragua (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Panama
Panama
Panama (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
British Indian Ocean Territory
Chagos Archipelago
Diego Garcia Island introduced
invasive
Whistler, W. Arthur (1996) (p. 24)
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., Nat. Res. Cons. Serv. (2013)
United States (continental except west coast)
United States (other states)
USA (Florida) native
U.S. Dept. Agr., Nat. Res. Cons. 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 1 JAN 1999 and was last updated on 30 NOV 2008.