Euphorbia peplus L., Euphorbiaceae

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Present on Pacific Islands?  yes

Threat only at high elevations?  no

Common name(s): [more details]

English: petty spurge

Habit:  herb

Description:  "Annual herbs; stems 1.5-3.5 dm long, glabrous.  Leaves bright green, caducous below, alternate below, becoming opposite or ternate above, membranous, floral leaves smaller, often congested and reflexed, spatulate, 1-1.4 cm long, 0.8-1.2 cm wide, margins entire, apex rounded, base acute or cuneate, petioles 0-0.6 cm long, stipules absent.  Cyathia solitary in the forks of the upper branches, peduncles 0.6-1 mm long; involucre pale green, ca. 1 mm high, glabrous, glands 4, green, crescent-shaped, ca. 0.5 mm long, with slender or filiform horns 0.5-0.7 mm long.  Capsules broadly ovoid, shallowly 3-lobed, 1.8-2 mm long, 2-2.2 mm in diameter.  Seeds gray, ovoid-oblong, weakly 6-angled, ca. 1.5 mm long, ca. 0.8 mm wide, coarsely pitted and minutely white tuberculate, carunculate"  (Wagner et al., 1999; pp. 619-620).

Habitat/ecology:  In Hawai‘i, "naturalized in open or often shaded, disturbed sites, especially pastures, 300-2,300 m" (Wagner et al., 1999; pp. 619-620).  In Fiji, "sparingly naturalized (or perhaps evanescent) at an elevation of about 750 m" (Smith, 1981; pp. 570-571).  "Uncommon in disturbed areas of Tongatapu" (Whistler, 1988; p. 18).

Propagation:  Seed

Native range:  Temperate Europe.

Presence:

Pacific
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Australia (Pacific offshore islands) Lord Howe Island	Lord Howe Island	introduced	Pickard, J. (1984) (p. 206)
Australia (Pacific offshore islands) Lord Howe Island	Lord Howe Island	introduced invasive	Orchard, Anthony E., ed. (1994) (p. 19) "A common weed of gardens and disturbed ground". Vouchers cited: J. Pickard 2670 (NSW), J. Pickard in A.N. Rodd 1319 (NSW), M.M.J. van Balgooy 1085 (NSW), J. Pickard 2767 (NSW)
Australia (Pacific offshore islands) Norfolk Islands	Norfolk Island	introduced invasive	Orchard, Anthony E., ed. (1994) (p. 8) "A common weed of gardens and disturbed ground". Vouchers cited: G. Uhe 1113 (K), P.S. Green 1442 (A)
Fiji Fiji Islands	Viti Levu Island	introduced invasive	Smith, Albert C. (1981) (pp. 570-571) Voucher cited: Greenwood 1171
French Polynesia Gambier Islands	Mangareva (Gambier) Island	introduced invasive	Florence, J. (1997) (pp. 62-63)
State of Hawaii Hawaiian Islands	Hawai‘i (Big) Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 619-620) Voucher cited: Rémy 599 (P)
State of Hawaii Hawaiian Islands	Kaua‘i Island	introduced invasive	Lorence, David H./Flynn, Timothy W./Wagner, Warren L. (1995) (p. 35) Voucher cited: D. Lorence et al. 5796 (PTBG, US)
State of Hawaii Hawaiian Islands	Kure Atoll	introduced invasive	Starr, Forest/Starr, Kim/Loope, Lloyd L. (2003) (p. 27) Voucher cited: Starr & Martz 010522-4 (BISH)
State of Hawaii Hawaiian Islands	Maui Island	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 619-620)
State of Hawaii Hawaiian Islands	O‘ahu Island	introduced	Wester, Lyndon (1992) (p. 137)
New Caledonia Îles Loyauté (Loyalte Islands)	Île Lifou	introduced	MacKee, H. S. (1994) (p. 51) Voucher cited: MacKee 40705
New Caledonia Îles Loyauté (Loyalte Islands)	Île Maré	introduced	MacKee, H. S. (1994) (p. 51) Voucher cited: Sarasin 492 (Z)
New Caledonia New Caledonia Archipelago	Île Grande Terre	introduced	MacKee, H. S. (1994) (p. 51) Vouchers cited: Delacour s.n., MacKee 40705
New Caledonia New Caledonia Archipelago	Île des Pins (Isle of Pines)	introduced	MacKee, H. S. (1994) (p. 51) Voucher cited: MacKee 5006
New Zealand (offshore islands) Kermadec Islands	Kermadec Islands	introduced invasive	Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 630)
New Zealand (offshore islands) Kermadec Islands	Raoul Island	introduced invasive	Sykes, W. R. (1977) (p. 106)
Pitcairn Islands Pitcairn Islands	Pitcairn Island	introduced invasive	Florence, J. (1997) (pp. 62-63)
Pitcairn Islands Pitcairn Islands	Pitcairn Island	introduced invasive	St. John, H. (1987) (p. 39) Voucher cited: Fosberg & B. Christian 11178
Tonga Tongatapu Group	Tongatapu Island		Whistler, W. A. (1992) (p. 23) Vouchers cited: Ilolahia 55, Soakai 745, Soakai 987
United States (other Pacific offshore islands) Midway Atoll	Midway Atoll	introduced invasive	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 619-620)

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)		Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 157)
Chile (continental) Chile	Chile (Republic of)		Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 157)
China China	China (People's Republic of)		Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 157)
Mexico Mexico	Mexico (United Mexican States)		Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 157)
New Zealand New Zealand	New Zealand (country)	introduced invasive	Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 630) "Waste places, gardens, riverbeds, coastal sites, often in shingle or in stony ground".

Indian Ocean
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Mauritius Mautitius Islands (Mauritius and Rodrigues)	Mauritius Island		Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 157)

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

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

References:

Florence, J. 1997. Flore de la Polynésie française, Vol. 1. Paris. Editions de l'Orstom, Institut Français de Recherche Scientifique pour le Développement en Coopération, Collection Faune et Flore Tropicales 34. 393 pp.

Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. 1979. A geographical atlas of world weeds. John Wiley & Sons, New York. 391 pp.

Lorence, David H./Flynn, Timothy W./Wagner, Warren L. 1995. Contributions to the flora of Hawai‘i. III. New additions, range extensions, and rediscoveries of flowering plants. In: Evenhuis, Neal L. and Miller, Scott, E., eds. Records of the Hawaii Biological Survey for 1994. Part 1: Articles. Bishop Museum Occasional Papers. 41:19-58.

MacKee, H. S. 1994. Catalogue des plantes introduites et cultivées en Nouvelle-Calédonie. Muséum National d'Histoire Naturelle, Paris, 164 p.

Orchard, Anthony E., ed. 1994. Flora of Australia. Vol. 49, Oceanic islands 1. Australian Government Publishing Service, Canberra.

Pickard, J. 1984. Exotic plants on Lord Howe Island: Distribution in space and time, 1853-1981. J. of Biogeography 11:181-208.

Smith, Albert C. 1981. Flora Vitiensis nova: a new flora of Fiji. National Tropical Botanical Garden, Lawai, Kauai, Hawaii. Volume 2. 810 pp.

St. John, H. 1987. An account of the flora of Pitcairn Island with new Pandanus species. Honolulu, 65 pp.

Starr, Forest/Starr, Kim/Loope, Lloyd L. 2003. New plant records from the Hawaiian Archipelago. In: Evenhuis, Neal L. and Eldredge, Lucius G., eds. Records of the Hawaii Biological Survey for 2001-2002. Part 2: Notes. Bishop Museum Occasional Papers. 74:23-34.

Sykes, W. R. 1977. Kermadec Islands flora: an annotated checklist. New Zealand Department of Scientific and Industrial Research Bulletin 219, Wellington. 216 pp.

Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. 1999. Manual of the flowering plants of Hawaii. Revised edition. Bernice P. Bishop Museum special publication. University of Hawai‘i Press/Bishop Museum Press, Honolulu. 1919 pp. (two volumes).

Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. 1988. Flora of New Zealand, Volume IV: Naturalised pteridophytes, gymnosperms, dicotyledons. Botany Division, DSIR, Christchurch. 1365 pp.

Wester, Lyndon. 1992. Origin and distribution of adventive flowering plants in Hawai‘i. In: Stone, Charles P.; Smith, Clifford W. and Tunison, J. Timothy. Alien plant invasions in native ecosystems of Hawaii: Management and Research. University of Hawaii, Cooperative National Park Research Studies Unit, Honolulu. University of Hawaii Press. .

Whistler, W. A. 1988. Checklist of the weed flora of western Polynesia. Technical Paper No. 194, South Pacific Commission, Noumea, New Caledonia. 69 pp.

Whistler, W. A. 1992. Flora of Tonga [unpublished checklist]. 107 pp.