Report to the Republic of Palau: 2008 update on Invasive Plant ...

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Table C. Critical species that should be subject <strong>to</strong> inter-island quarantine Scientific Name Common name Present on: Sesbania grandiflora katurai, hummingbird tree, scarlet wisteria tree Koror, Malakal, Babeldaob Solanum <strong>to</strong>rvum prickly solanum, devil’s fig Babeldaob louch beluu, blue rat’s tail, dark blue Koror, Malakal, , Babeldaob, Angaur, Kayangel, Stachytarpheta cayennensis snakeweed Peleliu, Ngidech, Urukthapel Syngonium angustatum arrowhead plant, goosefoot plant Koror, Malakal, Ngerkebesang, Babeldaob, Angaur, Peleliu Tephrosia candida white tephrosia Babeldaob Thunbergia grandiflora bung el etiu, blue trumpet vine, Bengal trumpet Koror, Babeldaob, Kayangel Timonius timon liberal Ngerkebesang, Angaur, Peleliu, Kayangel, Bkul a Chesemiich, Ngercheu (Carp Resort), Ngerchong, Ngchelobel, Ngeanges Turnera ulmifolia/subulata yellow alder, sage rose/white alder Koror, Malakal, Ngerkebesang, Babeldaob, Angaur, Peleliu Vitex parviflora small-leaved vitex Malakal (Toirechuil) Wedelia trilobata ngesil ra ngebard, Singapore daisy Koror, Malakal, Ngerkebesang, Babeldaob, Angaur, Peleliu Note: This table lists only <strong>the</strong> most serious invasive plants <strong>of</strong> environmental concern. See Appendices 6 and 7 for complete lists <strong>of</strong> species not yet present on each island or island group. • Table D (beginning next page) shows <strong>the</strong> most serious invasive plant species in <strong>Palau</strong> and summarizes recommendations for <strong>the</strong>ir management. In a number <strong>of</strong> cases, more detailed information and recommendations follow <strong>the</strong> table. 36
Table D. Summary <strong>of</strong> major invasive species present in <strong>Palau</strong> with recommendations for <strong>the</strong>ir management Scientific Name Common Names (abridged) Family Comments and recommendations *† Acacia farnesiana Elling<strong>to</strong>n curse, klu, sweet acacia Fabaceae Eradicate if still present. Adenan<strong>the</strong>ra pavonina telengtúngd, telentundalel, coral bean tree Fabaceae Assess extent and rate <strong>of</strong> spread, control as appropriate in sensitive and natural areas. Aeschynomene americana American joint vetch Fabaceae Map extent <strong>of</strong> infestation, determine if control or eradication is needed. *† † Allamanda cathartica allamanda, yellow trumpet vine Apocynaceae Discourage planting; remove when a problem. Alternan<strong>the</strong>ra brasiliana Brazilian joyweed, Joseph’s coat Amaranthaceae Alternan<strong>the</strong>ra ficoidea [=A. tenella] ‘Bettzickiana’ Discontinue planting; be alert <strong>to</strong> escapes from cultivation; eradicate single plant on Ngercheu Island (Carp Resort) and o<strong>the</strong>r isolated plantings. sanguinarea Amaranthaceae Evaluate for invasiveness (request or conduct risk assessment). Antigonon lep<strong>to</strong>pus dilngau, chain <strong>of</strong> love Polygonaceae Arundo donax giant reed Poaceae Discourage fur<strong>the</strong>r planting; map current distribution and work <strong>to</strong> eradicate over time. Map infestations; limit burning and moni<strong>to</strong>r for spread after wildfires; control as needed in sensitive and natural areas. Asparagus densiflorus asparagus fern, sprengeri fern Liliaceae Eradicate this and o<strong>the</strong>r ornamental Asparagus species. Barleria lupulina hophead, Philippine violet Acanthaceae Eradicate if <strong>of</strong> limited extent. Bryophyllum pinnatum life plant Crassulaceae Control outside <strong>of</strong> cultivation. Bryophyllum delagoense chandelier plant Crassulaceae Control outside <strong>of</strong> cultivation. * Calamus sp. rattan, bangerenguis ra ngebard Arecaceae Map distribution; evaluate and possibly propose for eradication. Cala<strong>the</strong>a majestica [=C. Moni<strong>to</strong>r for possible spread and <strong>to</strong> determine if control or eradication is no common name Marantaceae princeps] needed. Calotropis gigantea calotrope, crown flower, madar Ascelepiadaceae Moni<strong>to</strong>r for spread. † Calliandra calothyrsus powderpuff, red calliandra Fabaceae Discourage fur<strong>the</strong>r planting; eradicate if <strong>of</strong> limited extent. † Calliandra surinamensis pink powder puff Fabaceae Discourage fur<strong>the</strong>r planting; eradicate if <strong>of</strong> limited extent. Casuarina equisetifolia ngas, casuarina, ironwood, Australian pine Casuarinaceae Chloris virgata fea<strong>the</strong>r finger grass, fea<strong>the</strong>ry Rhodes grass Poaceae Chromolaena odorata ngesngesil, chromolaena, Siam weed Asteraceae Chrysopogon aciculatus iul, Mackie’s pest, lovegrass Poaceae Eradicate on Tobi and Helen’s Reef; exclude from Sonsorol and o<strong>the</strong>r islands <strong>of</strong> Sonsorol State; consider replacement with more suitable species on Rock Island beaches. Map extent <strong>of</strong> infestation and evaluate whe<strong>the</strong>r control or eradication is needed. Introduce new biological control agents if practical and maintain existing ones; extirpate on Ngidech Island and any o<strong>the</strong>r isolated areas in <strong>the</strong> Rock Islands. Provide advice on control <strong>to</strong> Sonsorol and Tobi; promptly eradicate if found on new islands. Cinnamomum verum ochod ra ngebard, cinnamon tree Lauraceae Eradicate if found and <strong>of</strong> limited extent. 37
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Page 4 and 5: Pulo Ana ..........................
Page 7 and 8: Report to<
Page 9 and 10: of known or potent
Page 11 and 12: Leucas lavandulifolia [voucher 9929
Page 13 and 14: Rock Islands We were especially int
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Scientific Name Hawai'i Guam Yap Pa
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Synonym Listed as Family Gomphrena
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Fosberg, F. R., and M.-H. Sachet. 1
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Stoddart, D. R. 19
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