risk assessments

Pacific Island Ecosystems at Risk (PIER)

Risk Assessments
Risk assessments for species beginning with the letter "S":

Information on Risk Assessments

Scientific Name Family Common name Risk assessment Country or Area Score Recommendation

Sabal mauritiiformis Arecaceae savannah palm Assessment Pacific -2 low risk

Saccharum arundinaceum Poaceae sweetcane Assessment U.S. 3 accept*

Saccharum arundinaceum Poaceae sweetcane Assessment U.S. (Florida) 3 accept*

Saccharum officinarum Poaceae sugar cane Assessment Pacific -2 low risk

Saccharum officinarum Poaceae sugar cane Assessment U.S. 5 accept*

Saccharum officinarum Poaceae sugar cane Assessment U.S. (Florida) 4 accept*

Saccharum officinarum Poaceae sugar cane Assessment U.S. (Florida) 5 accept*

Saccharum spontaneum Poaceae wild sugarcane Assessment Pacific 17 high risk

Saggitaria sagittifolia Alismataceae Chinese arrowhead Assessment United States medium-high

Salicornia virginica Chenopodiaceae Virginia pickleweed Assessment Pacific 4 low risk*

Salix babylonica Salicaceae weeping willow Assessment Pacific 9 high risk

Salsoli kali Chenopodiaceae tumbleweed Assessment Pacific 18.5 high risk

Salvia hispanica Lamiaceae chia Assessment Pacific -1 low risk

Salvia splendens Lamiaceae scarlet sage Assessment U.S. (Florida) 4 accept*

Salvinia molesta Salviniaceae salvinia Assessment Australia 19 reject

Salvinia molesta Salviniaceae salvinia Assessment Pacific 29 high risk

Samanea saman Fabaceae monkeypod Assessment Pacific 4 low risk*

Sambucus mexicana Caprifoliaceae Mexican elderberry Assessment Pacific 9 high risk

Sanchezia speciosa

Acanthaceae

sanchezia

Assessment

Pacific

3

low risk*

Sandoricum koetjape Meliaceae red santol Assessment Pacific 1 evaluate

Sansevieria hyacinthoides Agavaceae African bowstring hemp Assessment U.S. (Florida) 14 reject

Sansevieria trifasciata

Agavaceae

monther-in-law's tongue

Assessment

Pacific

9

high risk

Santalum album Santalaceae Indian sandal wood Assessment Pacific -3 low risk

Saraca asoca Fabaceae asoka tree Assessment Pacific 0 low risk

Saraca declinata Fabaceae red saraca Assessment Pacific -3 low risk

Saraca indica

Fabaceae

Ashoka tree

Assessment

Pacific

-7

low risk

Saraca thaipingensis Fabaceae yellow saraca Assessment Pacific 2 low risk

Saritaea magnifica Bignoniaceae glowvine Assessment Pacific 1 evaluate

Sauropus androgynus Euphorbiaceae star gooseberry Assessment Pacific 4 evaluate

Satakentia liukiuensis Arecaceae satake palm Assessment Pacific -2 low risk

Saxifraga sarmentosa

Saxifragaceae

strawberry saxifrage

Assessment

Pacific

3

low risk*

Scabiosa olgae Dipsacaceae Assessment U.S. (Florida) -2 accept

Scadoxus multiflorus Amaryllidaceae blood lily Assessment Pacific -1 low risk

Scaevola aemula Goodeniaceae common fanflower Assessment Pacific -6 low risk

Scaevola sericea Goodeniaceae beach naupaka Assessment U.S. (Florida) 14 reject**

Schefflera actinophylla

Araliaceae

octopus tree

Assessment

Pacific

13

high risk

Schefflera actinophylla Araliaceae octopus tree Assessment U.S. (Florida) 14 reject

Schefflera arboricola Araliaceae dwarf schefflera Assessment Pacific 3 evaluate

Schefflera elegantissima
Araliaceae
false aralia

Assessment

Pacific

0

low risk

Schefflera heptaphylla Araliaceae ivy tree Assessment Pacific 4 evaluate

Schefflera taiwaniana Araliaceae umbrella plant Assessment Pacific 1 evaluate

Schinus molle Anacardiaceae pepper tree Assessment Pacific 10 high risk

Schinus terebinthifolius

Anacardiaceae

Brazilian pepper

Assessment

Pacific

19

high risk

Schinus terebinthifolius Anacardiaceae Brazilian pepper Assessment U.S. (Florida) 19 reject

Schizachyrium condensatum Poaceae bush beardgrass Assessment Pacific 13 high risk

Schizostachyum brachycladum Poaceae sacred Bali bamboo Assessment Pacific -1 low risk

Schizostachyum glaucifolium

Poaceae

Hawaiian bamboo

Assessment

Pacific

0

low risk

Schleichera oleosa Sapindaceae Ceylon oak Assessment Pacific 1 evaluate

Schleinitzia insularum Fabaceae chotha-hao Assessment Pacific -1 low risk**

Schotia brachypetala

Fabaceae

elephant hedge bean tree

Assessment

Pacific

0

low risk

Schotia latifolia Fabaceae bush boer-bean Assessment U.S. (Florida) 3 evaluate

Scilla rosenii Hyacinthaceae scilla Assessment U.S. (Florida) 1 accept*

Scleranthus annuus Caryophyllaceae German knotweed Assessment U.S. (Florida) 5 evaluate

Searsia lancea Anacardiaceae willow rhus Assessment Pacific 8 high risk

Sedum pachypyllum Crassulaceae jelly beans Assessment Pacific 3 evaluate

Semecarpus anacardium Anacardiaceae marking nut tree Assessment Pacific 5 evaluate

Senecio cineraria

Asteraceae

dusty miller

Assessment

Pacific

2

low risk*

Senecio madagascariensis Asteraceae fireweed Assessment Australia 15 reject

Senecio madagascariensis

Asteraceae

fireweed

Assessment

Pacific

23

high risk

Senecio mandraliscae Asteraceae blue finger Assessment Pacific -3 low riski

Senna alata Fabaceae candle bush Assessment Australia 20 reject

Senna alata Fabaceae candle bush Assessment Pacific 10 high risk

Senna artemisioides Fabaceae silver senna Assessment Pacific 9 high risk

Senna bicapsularis Fabaceae Christmasbush Assessment Pacific 8 high risk

Senna multijuga Fabaceae leafy cassia Assessment Pacific 7 high risk

Senna obtusifolia Fabaceae sicklepod Assessment Australia 14 reject

Senna obtusifolia Fabaceae sicklepod Assessment Pacific 20 high risk

Senna siamea Fabaceae cassod tree Assessment Pacific 5 low risk*

Senna spectabilis Fabaceae spectacular cassia Assessment Pacific 11 high risk

Senna surattensis

Fabaceae

kolomona

Assessment

Pacific

0

evaluate

Senna tora Fabaceae Java bean Assessment Australia 10 reject

Sequoia sempervirens Cupressaceae California redwood
Assessment
Pacific -4
low risk

Serianthes kanehirae Fabaceae ukall Assessment Pacific -5
low risk

Serissa foetida Rubiaceae snow rose Assessment U.S. (Florida) -4
accept

Serissa japonica

Rubiaceae

serissa

Assessment

Pacific

-10

low risk

Sesbania cannabina Fabaceae sesbania pea Assessment Australia 17 reject

Sesbania grandiflora Fabaceae scarlet wisteria tree Assessment Pacific 2 low risk*

Sesbania punicea

Fabaceae

rattlebox

Assessment

Pacific

9.5

high risk

Sesbania sesban Fabaceae Egyptian riverhemp Assessment Pacific 11 high risk

Setaria italica Poaceae foxtail millet Assessment Australia 3 evaluate

Setaria italica Poaceae foxtail millet Assessment Pacific 9 high risk

Setaria palmifolia Poaceae palmgrass Assessment Australia 7 reject

Setaria setosa Poaceae West Indian bristlegrass Assessment U.S. (Florida) 1 accept*

Setaria sphacelata Poaceae African bristle grass Assessment Pacific 19 high risk

Sherardia arvensis Rubiaceae blue fieldmadder Assessment U.S. (Florida) 7 reject

Sida acuta Malvaceae broom weed Assessment Australia 19 reject

Sida cordifolia Malvaceae flannelweed Assessment Australia 15 reject

Sida rhombifolia Malvaceae paddy's lucerne Assessment Australia 13 reject

Sida spinosa Malvaceae prickly sida Assessment U.S. (Florida) 9 reject

Sideroxylon persimile Sapotaceae bastard cherry Assessment Pacific 8 high risk

Sigesbeckia orientalis Asteraceae small yellow crownbeard Assessment Pacific 13 high risk

Silene armeria Caryophyllaceae sweet William catchfly Assessment Pacific 7 high risk

Silene pygmaea Caryophyllaceae Assessment U.S. (Florida) -2 accept

Silybum marianum Asteraceae milk thistle Assessment Pacific 17.5 high risk

Simmondsia chinensis Simmondsiaceae jojoba Assessment Pacific -3 low risk

Sinacalia tangutica Asteraceae Chinese ragwort Assessment U.S. (Florida) 7 reject

Sindora supa Fabaceae supa Assessment Pacific 5 evaluate

Sinocalamus latiflorus Poaceae wideleaf bamboo Assessment U.S. (Florida) -2 accept

Siparuna pauciflora Monimiaceae Assessment U.S. (Florida) -2 accept

Smilacina fusca Convallariaceae Assessment U.S. (Florida) 0 accept

Solandra maxima Solanaceae golden cup Assessment Pacific 3 evaluate

Solanum aethiopicum Solanaceae Chinese scarlet eggplant Assessment Pacific 4 low risk*

Solanum betaceum Solanaceae tree tomato Assessment Pacific 7 high risk

Solanum capsicoides Solanaceae cockroach berry Assessment Pacific 15 high risk

Solanum glaucophyllum Solanaceae waxy-leaf nightshade Assessment Pacific 10 high risk

Solanum lycopersicum Solanaceae wild tomato Assessment Australia 2 evaluate

Solanum mauritianum Solanaceae bugtree Assessment Pacific 24 high risk

Solanum melongena Solanaceae eggplant Assessment Pacific 1 low risk*

Solanum muricatum Solanaceae melon pear Assessment Pacific 5 low risk*

Solanum quitoense Solanaceae naranjilla Assessment Pacific 11 high risk

Solanum seaforthianum Solanaceae Brazilian nightshade Assessment Pacific 9 high risk

Solanum torvum Solanaceae turkeyberry Assessment Pacific 24 high risk

Solanum viarum Solanaceae tropical soda apple Assessment U.S. (Florida) 24 reject

Solanum viarum Solanaceae tropical soda apple Assessment United States high risk

Sonneratia caseolaris Lythraceae crabapple mangrove Assessment U.S. (Florida) 2 evaluate

Sophora tomentosa

Fabaceae

yellow necklacepod

Assessment

Pacific

-3

low risk

Sorghum bicolor Poaceae grain sorghum Assessment Australia 3 evaluate

Sorghum bicolor Poaceae grain sorghum Assessment Pacific 6 low risk*

Sorghum bicolor ssp. drummondii Poaceae shattercane Assessment Pacific 17.5 high risk

Sorghum bicolor (grain sorghum) Poaceae grain sorghum Assessment U.S. (Florida) 7 reject

Sorghum bicolor (shattercane) Poaceae shattercane Assessment U.S. (Florida) 18 reject

Sorghum bicolor (sweet) Poaceae shattercane Assessment U.S. 3 accept*

Sorghum bicolor (sweet) Poaceae sweet sorghum Assessment U.S. (Florida) 2 accept*

Sorghum halepense Poaceae Johnson grass Assessment Australia 25 reject

Soulamea amara Simaroubaceae bitter tree Assessment Pacific -1 low risk

Spartium junceum

Fabaceae

Spanish broom

Assessment

Pacific

12

high risk

Spathiphyllum cannifolium

Araceae

spathe flower

Assessment

Pacific

-4

low risk

Spathiphyllum wallisii

Araceae

peace lily

Assessment

Pacific

-4

low risk

Spathodea campanulata Bignoniaceae African tulip tree Assessment Pacific 14 high risk

Spathoglottis plicata Orchidaceae Philippine ground orchid Assessment Pacific 16 high risk

Spathoglottis unguiculata Orchidaceae clawed spathoglottis Assessment Pacific 3 low risk*

Spergula arvensis Caryophyllaceae corn spurrey Assessment U.S. (Florida) 20 reject

Sphagneticola trilobata Asteraceae Singapore daisy Assessment Australia 6 reject

Sphagneticola trilobata Asteraceae Singapore daisy Assessment Pacific 13 high risk

Sphagnum palustre Sphagnaceae peat moss Assessment Pacific 12.5 high risk

Spiraea cantoniensis Rosaceae Reeve's spiraea Assessment Pacific 4 evaluate

Spiraea mongolica Rosaceae Assessment U.S. (Florida) 0 accept

Spondias dulcis

Anacardiaceae

wi apple

Assessment

Pacific

-5

low risk

Spondias mombin Anacardiaceae mombin Assessment Pacific 10 high risk

Spondias purpurea Anacardiaceae purple mombin Assessment Pacific 5 evaluate

Sporobolus indicus Poaceae smutgrass Assessment U.S. (Florida) 18 reject

Sporobolus pyramidatus Poaceae whorled dropseed Assessment Pacific 14 high risk

Stachytarpheta cayennensis Verbenaceae blue rat's tail Assessment Australia 20 reject

Stachytarpheta mutabilis Verbenaceae coral porterweed Assessment Pacific 12 high risk

Stapelia gigantea Apocynaceae giant toadplant Assessment Pacific 3 low risk*

Stellaria media Caryophyllaceae common chickweed Assessment U.S. (Florida) 25 reject

Stemmadenia litoralis

Apocynaceae

lecheso

Assessment

Pacific

-5

low risk

Stenocarpus sinuatus Proteaceae wheel of fire Assessment Pacific -4 low risk

Stenotaphrum secundatum Poaceae St. Augustine grass Assessment Australia 6 reject

Stenotaphrum secundatum Poaceae St. Augustine grass Assessment Pacific 15 high risk

Stepanotis floribunda Apocynaceae wedding flower Assessment Pacific -4 low risk

Sterculia apetala Sterculiaceae Panama tree Assessment Pacific 4 evaluate

Sterculia foetica Sterculiaceae Java olive Assessment Pacific 3 low risk*

Stigmaphyllon floribundum Malpighiaceae woolly Amazon vine Assessment Pacific -6 low risk

Strelitzia nicolai Strelitziaceae bird of paradise tree Assessment Pacific -1 low risk

Strelitzia reginae

Strelitziaceae

bird of paradise

Assessment

Pacific

-3

low risk

Streptosolen jamesonii Solanaceae marmalade bush Assessment Pacific 2 low risk

Striga gesnerioides Orobanchaceae cowpea witchweed Assessment U.S. (Florida) 15 reject

Strobilanthes dyeriana Acanthaceae Persian shield Assessment Pacific 7 high risk

Strobilanthes glomerata Acanthaceae strobilanthes Assessment Pacific 4 evaluate

Stromanthe macrochlamys Marantaceae stromanthe Assessment Pacific 0 low risk

Stromanthe tonckat Marantaceae stromanthe Assessment Pacific 7
high risk

Strongylodon macrobotrys Fabaceae jade vine Assessment Pacific -9 low risk

Strophanthus amboensis Apocynaceae elephant vine Assessment Pacific 2 evaluate

Strophanthus gratus Apocynaceae climbing oleander Assessment Pacific 0 low risk

Strophanthus preussii Apocynaceae climbing oleander Assessment Pacific 0 low risk

Strychnos toxifera Loganiaceae strychnine Assessment U.S. (Florida) -2 accept

Stylosanthes guianensis Fabaceae stylo Assessment Australia 12 reject

Stylosanthes guianensis Fabaceae stylo Assessment Pacific 11 high risk

Stylosanthes scabra

Fabaceae

shrubby stylo

Assessment

Pacific

1

low risk*

Suriana maritima Surianaceae bay cedar Assessment Pacific 2 evaluate**

Swietenia macrophylla

Meliaceae

large-leaf mahogany

Assessment

Pacific

4

evaluate

Swietenia mahagoni

Meliaceae

West Indian mahogany

Assessment

Pacific

2

low risk*

Syagrus romanzoffiana Arecaceae queen palm Assessment
Pacific

-2

low risk

Synadenium grantii Euphorbiaceae African milkbush Assessment Pacific 4 low risk*

Synadenium grantii Euphorbiaceae African milkbush Assessment U.S. (Florida) 3 accept

Syngonium auritum Araceae five-fingers Assessment Pacific 1 low risk*

Syngonium podophyllum Araceae arrowhead plant Assessment Pacific 15 high risk

Synsepalum dulcificum Sapotaceae miracle fruit Assessment Pacific -3 low risk

Syzygium australe Myrtaceae brush cherry Assessment Pacific 15 high risk

Syzygium cumini Myrtaceae Java plum Assessment Pacific 9 high risk

Syzygium cumini Myrtaceae Java plum Assessment U.S. (Florida) 9 reject

Syzygium jambos Myrtaceae Malabar-plum Assessment Pacific 20 high risk

Syzygium malaccense Myrtaceae mountain apple Assessment Pacific 0 low risk

Syzygium polyanthum Myrtaceae Indian bayleaf Assessment Pacific 7 high risk

*Accepted or rejected based on second screen.
**Native or early introduction in the Pacific region (excluding Hawai‘i).

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This page updated 22 March 2013

Scientific Name	Family	Common name	Risk assessment	Country or Area	Score	Recommendation
Sabal mauritiiformis	Arecaceae	savannah palm	Assessment	Pacific	-2	low risk
Saccharum arundinaceum	Poaceae	sweetcane	Assessment	U.S.	3	accept*
Saccharum arundinaceum	Poaceae	sweetcane	Assessment	U.S. (Florida)	3	accept*
Saccharum officinarum	Poaceae	sugar cane	Assessment	Pacific	-2	low risk
Saccharum officinarum	Poaceae	sugar cane	Assessment	U.S.	5	accept*
Saccharum officinarum	Poaceae	sugar cane	Assessment	U.S. (Florida)	4	accept*
Saccharum officinarum	Poaceae	sugar cane	Assessment	U.S. (Florida)	5	accept*
Saccharum spontaneum	Poaceae	wild sugarcane	Assessment	Pacific	17	high risk
Saggitaria sagittifolia	Alismataceae	Chinese arrowhead	Assessment	United States		medium-high
Salicornia virginica	Chenopodiaceae	Virginia pickleweed	Assessment	Pacific	4	low risk*
Salix babylonica	Salicaceae	weeping willow	Assessment	Pacific	9	high risk
Salsoli kali	Chenopodiaceae	tumbleweed	Assessment	Pacific	18.5	high risk
Salvia hispanica	Lamiaceae	chia	Assessment	Pacific	-1	low risk
Salvia splendens	Lamiaceae	scarlet sage	Assessment	U.S. (Florida)	4	accept*
Salvinia molesta	Salviniaceae	salvinia	Assessment	Australia	19	reject
Salvinia molesta	Salviniaceae	salvinia	Assessment	Pacific	29	high risk
Samanea saman	Fabaceae	monkeypod	Assessment	Pacific	4	low risk*
Sambucus mexicana	Caprifoliaceae	Mexican elderberry	Assessment	Pacific	9	high risk
Sanchezia speciosa	Acanthaceae	sanchezia	Assessment	Pacific	3	low risk*
Sandoricum koetjape	Meliaceae	red santol	Assessment	Pacific	1	evaluate
Sansevieria hyacinthoides	Agavaceae	African bowstring hemp	Assessment	U.S. (Florida)	14	reject
*Sansevieria trifasciata*	Agavaceae	monther-in-law's tongue	Assessment	Pacific	9	high risk
*Santalum album*	Santalaceae	Indian sandal wood	Assessment	Pacific	-3	low risk
Saraca asoca	Fabaceae	asoka tree	Assessment	Pacific	0	low risk
*Saraca declinata*	Fabaceae	red saraca	Assessment	Pacific	-3	low risk
*Saraca indica*	Fabaceae	Ashoka tree	Assessment	Pacific	-7	low risk
*Saraca thaipingensis*	Fabaceae	yellow saraca	Assessment	Pacific	2	low risk
*Saritaea magnifica*	Bignoniaceae	glowvine	Assessment	Pacific	1	evaluate
*Sauropus androgynus*	Euphorbiaceae	star gooseberry	Assessment	Pacific	4	evaluate
*Satakentia liukiuensis*	Arecaceae	satake palm	Assessment	Pacific	-2	low risk
Saxifraga sarmentosa	Saxifragaceae	strawberry saxifrage	Assessment	Pacific	3	low risk*
Scabiosa olgae	Dipsacaceae		Assessment	U.S. (Florida)	-2	accept
*Scadoxus multiflorus*	Amaryllidaceae	blood lily	Assessment	Pacific	-1	low risk
*Scaevola aemula*	Goodeniaceae	common fanflower	Assessment	Pacific	-6	low risk
Scaevola sericea	Goodeniaceae	beach naupaka	Assessment	U.S. (Florida)	14	reject**
*Schefflera actinophylla*	Araliaceae	octopus tree	Assessment	Pacific	13	high risk
*Schefflera actinophylla*	Araliaceae	octopus tree	Assessment	U.S. (Florida)	14	reject
Schefflera arboricola	Araliaceae	dwarf schefflera	Assessment	Pacific	3	evaluate
Schefflera elegantissima	Araliaceae	false aralia	Assessment	Pacific	0	low risk
*Schefflera heptaphylla*	Araliaceae	ivy tree	Assessment	Pacific	4	evaluate
Schefflera taiwaniana	Araliaceae	umbrella plant	Assessment	Pacific	1	evaluate
Schinus molle	Anacardiaceae	pepper tree	Assessment	Pacific	10	high risk
*Schinus terebinthifolius*	Anacardiaceae	Brazilian pepper	Assessment	Pacific	19	high risk
*Schinus terebinthifolius*	Anacardiaceae	Brazilian pepper	Assessment	U.S. (Florida)	19	reject
*Schizachyrium condensatum*	Poaceae	bush beardgrass	Assessment	Pacific	13	high risk
*Schizostachyum brachycladum*	Poaceae	sacred Bali bamboo	Assessment	Pacific	-1	low risk
*Schizostachyum glaucifolium*	Poaceae	Hawaiian bamboo	Assessment	Pacific	0	low risk
*Schleichera oleosa*	Sapindaceae	Ceylon oak	Assessment	Pacific	1	evaluate
*Schleinitzia insularum*	Fabaceae	chotha-hao	Assessment	Pacific	-1	low risk**
*Schotia brachypetala*	Fabaceae	elephant hedge bean tree	Assessment	Pacific	0	low risk
Schotia latifolia	Fabaceae	bush boer-bean	Assessment	U.S. (Florida)	3	evaluate
Scilla rosenii	Hyacinthaceae	scilla	Assessment	U.S. (Florida)	1	accept*
Scleranthus annuus	Caryophyllaceae	German knotweed	Assessment	U.S. (Florida)	5	evaluate
*Searsia lancea*	Anacardiaceae	willow rhus	Assessment	Pacific	8	high risk
*Sedum pachypyllum*	Crassulaceae	jelly beans	Assessment	Pacific	3	evaluate
*Semecarpus anacardium*	Anacardiaceae	marking nut tree	Assessment	Pacific	5	evaluate
Senecio cineraria	Asteraceae	dusty miller	Assessment	Pacific	2	low risk*
Senecio madagascariensis	Asteraceae	fireweed	Assessment	Australia	15	reject
Senecio madagascariensis	Asteraceae	fireweed	Assessment	Pacific	23	high risk
*Senecio mandraliscae*	Asteraceae	blue finger	Assessment	Pacific	-3	low riski
Senna alata	Fabaceae	candle bush	Assessment	Australia	20	reject
Senna alata	Fabaceae	candle bush	Assessment	Pacific	10	high risk
Senna artemisioides	Fabaceae	silver senna	Assessment	Pacific	9	high risk
Senna bicapsularis	Fabaceae	Christmasbush	Assessment	Pacific	8	high risk
Senna multijuga	Fabaceae	leafy cassia	Assessment	Pacific	7	high risk
Senna obtusifolia	Fabaceae	sicklepod	Assessment	Australia	14	reject
Senna obtusifolia	Fabaceae	sicklepod	Assessment	Pacific	20	high risk
Senna siamea	Fabaceae	cassod tree	Assessment	Pacific	5	low risk*
Senna spectabilis	Fabaceae	spectacular cassia	Assessment	Pacific	11	high risk
Senna surattensis	Fabaceae	kolomona	Assessment	Pacific	0	evaluate
Senna tora	Fabaceae	Java bean	Assessment	Australia	10	reject
*Sequoia sempervirens*	Cupressaceae	California redwood	Assessment	Pacific	-4	low risk
*Serianthes kanehirae*	Fabaceae	ukall	Assessment	Pacific	-5	low risk
Serissa foetida	Rubiaceae	snow rose	Assessment	U.S. (Florida)	-4	accept
Serissa japonica	Rubiaceae	serissa	Assessment	Pacific	-10	low risk
Sesbania cannabina	Fabaceae	sesbania pea	Assessment	Australia	17	reject
Sesbania grandiflora	Fabaceae	scarlet wisteria tree	Assessment	Pacific	2	low risk*
*Sesbania punicea*	Fabaceae	rattlebox	Assessment	Pacific	9.5	high risk
*Sesbania sesban*	Fabaceae	Egyptian riverhemp	Assessment	Pacific	11	high risk
Setaria italica	Poaceae	foxtail millet	Assessment	Australia	3	evaluate
Setaria italica	Poaceae	foxtail millet	Assessment	Pacific	9	high risk
Setaria palmifolia	Poaceae	palmgrass	Assessment	Australia	7	reject
Setaria setosa	Poaceae	West Indian bristlegrass	Assessment	U.S. (Florida)	1	accept*
*Setaria sphacelata*	Poaceae	African bristle grass	Assessment	Pacific	19	high risk
Sherardia arvensis	Rubiaceae	blue fieldmadder	Assessment	U.S. (Florida)	7	reject
Sida acuta	Malvaceae	broom weed	Assessment	Australia	19	reject
Sida cordifolia	Malvaceae	flannelweed	Assessment	Australia	15	reject
Sida rhombifolia	Malvaceae	paddy's lucerne	Assessment	Australia	13	reject
Sida spinosa	Malvaceae	prickly sida	Assessment	U.S. (Florida)	9	reject
Sideroxylon persimile	Sapotaceae	bastard cherry	Assessment	Pacific	8	high risk
Sigesbeckia orientalis	Asteraceae	small yellow crownbeard	Assessment	Pacific	13	high risk
Silene armeria	Caryophyllaceae	sweet William catchfly	Assessment	Pacific	7	high risk
Silene pygmaea	Caryophyllaceae		Assessment	U.S. (Florida)	-2	accept
Silybum marianum	Asteraceae	milk thistle	Assessment	Pacific	17.5	high risk
*Simmondsia chinensis*	Simmondsiaceae	jojoba	Assessment	Pacific	-3	low risk
Sinacalia tangutica	Asteraceae	Chinese ragwort	Assessment	U.S. (Florida)	7	reject
*Sindora supa*	Fabaceae	supa	Assessment	Pacific	5	evaluate
Sinocalamus latiflorus	Poaceae	wideleaf bamboo	Assessment	U.S. (Florida)	-2	accept
Siparuna pauciflora	Monimiaceae		Assessment	U.S. (Florida)	-2	accept
Smilacina fusca	Convallariaceae		Assessment	U.S. (Florida)	0	accept
Solandra maxima	Solanaceae	golden cup	Assessment	Pacific	3	evaluate
Solanum aethiopicum	Solanaceae	Chinese scarlet eggplant	Assessment	Pacific	4	low risk*
Solanum betaceum	Solanaceae	tree tomato	Assessment	Pacific	7	high risk
Solanum capsicoides	Solanaceae	cockroach berry	Assessment	Pacific	15	high risk
Solanum glaucophyllum	Solanaceae	waxy-leaf nightshade	Assessment	Pacific	10	high risk
Solanum lycopersicum	Solanaceae	wild tomato	Assessment	Australia	2	evaluate
Solanum mauritianum	Solanaceae	bugtree	Assessment	Pacific	24	high risk
Solanum melongena	Solanaceae	eggplant	Assessment	Pacific	1	low risk*
Solanum muricatum	Solanaceae	melon pear	Assessment	Pacific	5	low risk*
*Solanum quitoense*	Solanaceae	naranjilla	Assessment	Pacific	11	high risk
Solanum seaforthianum	Solanaceae	Brazilian nightshade	Assessment	Pacific	9	high risk
Solanum torvum	Solanaceae	turkeyberry	Assessment	Pacific	24	high risk
Solanum viarum	Solanaceae	tropical soda apple	Assessment	U.S. (Florida)	24	reject
Solanum viarum	Solanaceae	tropical soda apple	Assessment	United States		high risk
Sonneratia caseolaris	Lythraceae	crabapple mangrove	Assessment	U.S. (Florida)	2	evaluate
*Sophora tomentosa*	Fabaceae	yellow necklacepod	Assessment	Pacific	-3	low risk
Sorghum bicolor	Poaceae	grain sorghum	Assessment	Australia	3	evaluate
Sorghum bicolor	Poaceae	grain sorghum	Assessment	Pacific	6	low risk*
Sorghum bicolor ssp. drummondii	Poaceae	shattercane	Assessment	Pacific	17.5	high risk
Sorghum bicolor (grain sorghum)	Poaceae	grain sorghum	Assessment	U.S. (Florida)	7	reject
Sorghum bicolor (shattercane)	Poaceae	shattercane	Assessment	U.S. (Florida)	18	reject
Sorghum bicolor (sweet)	Poaceae	shattercane	Assessment	U.S.	3	accept*
Sorghum bicolor (sweet)	Poaceae	sweet sorghum	Assessment	U.S. (Florida)	2	accept*
Sorghum halepense	Poaceae	Johnson grass	Assessment	Australia	25	reject
Soulamea amara	Simaroubaceae	bitter tree	Assessment	Pacific	-1	low risk
Spartium junceum	Fabaceae	Spanish broom	Assessment	Pacific	12	high risk
*Spathiphyllum cannifolium*	Araceae	spathe flower	Assessment	Pacific	-4	low risk
*Spathiphyllum wallisii*	Araceae	peace lily	Assessment	Pacific	-4	low risk
Spathodea campanulata	Bignoniaceae	African tulip tree	Assessment	Pacific	14	high risk
Spathoglottis plicata	Orchidaceae	Philippine ground orchid	Assessment	Pacific	16	high risk
Spathoglottis unguiculata	Orchidaceae	clawed spathoglottis	Assessment	Pacific	3	low risk*
Spergula arvensis	Caryophyllaceae	corn spurrey	Assessment	U.S. (Florida)	20	reject
Sphagneticola trilobata	Asteraceae	Singapore daisy	Assessment	Australia	6	reject
Sphagneticola trilobata	Asteraceae	Singapore daisy	Assessment	Pacific	13	high risk
Sphagnum palustre	Sphagnaceae	peat moss	Assessment	Pacific	12.5	high risk
Spiraea cantoniensis	Rosaceae	Reeve's spiraea	Assessment	Pacific	4	evaluate
Spiraea mongolica	Rosaceae		Assessment	U.S. (Florida)	0	accept
*Spondias dulcis*	Anacardiaceae	wi apple	Assessment	Pacific	-5	low risk
*Spondias mombin*	Anacardiaceae	mombin	Assessment	Pacific	10	high risk
*Spondias purpurea*	Anacardiaceae	purple mombin	Assessment	Pacific	5	evaluate
Sporobolus indicus	Poaceae	smutgrass	Assessment	U.S. (Florida)	18	reject
Sporobolus pyramidatus	Poaceae	whorled dropseed	Assessment	Pacific	14	high risk
Stachytarpheta cayennensis	Verbenaceae	blue rat's tail	Assessment	Australia	20	reject
Stachytarpheta mutabilis	Verbenaceae	coral porterweed	Assessment	Pacific	12	high risk
Stapelia gigantea	Apocynaceae	giant toadplant	Assessment	Pacific	3	low risk*
Stellaria media	Caryophyllaceae	common chickweed	Assessment	U.S. (Florida)	25	reject
*Stemmadenia litoralis*	Apocynaceae	lecheso	Assessment	Pacific	-5	low risk
*Stenocarpus sinuatus*	Proteaceae	wheel of fire	Assessment	Pacific	-4	low risk
Stenotaphrum secundatum	Poaceae	St. Augustine grass	Assessment	Australia	6	reject
Stenotaphrum secundatum	Poaceae	St. Augustine grass	Assessment	Pacific	15	high risk
Stepanotis floribunda	Apocynaceae	wedding flower	Assessment	Pacific	-4	low risk
Sterculia apetala	Sterculiaceae	Panama tree	Assessment	Pacific	4	evaluate
*Sterculia foetica*	Sterculiaceae	Java olive	Assessment	Pacific	3	low risk*
Stigmaphyllon floribundum	Malpighiaceae	woolly Amazon vine	Assessment	Pacific	-6	low risk
*Strelitzia nicolai*	Strelitziaceae	bird of paradise tree	Assessment	Pacific	-1	low risk
Strelitzia reginae	Strelitziaceae	bird of paradise	Assessment	Pacific	-3	low risk
*Streptosolen jamesonii*	Solanaceae	marmalade bush	Assessment	Pacific	2	low risk
Striga gesnerioides	Orobanchaceae	cowpea witchweed	Assessment	U.S. (Florida)	15	reject
Strobilanthes dyeriana	Acanthaceae	Persian shield	Assessment	Pacific	7	high risk
Strobilanthes glomerata	Acanthaceae	strobilanthes	Assessment	Pacific	4	evaluate
*Stromanthe macrochlamys*	Marantaceae	stromanthe	Assessment	Pacific	0	low risk
*Stromanthe tonckat*	Marantaceae	stromanthe	Assessment	Pacific	7	high risk
Strongylodon macrobotrys	Fabaceae	jade vine	Assessment	Pacific	-9	low risk
Strophanthus amboensis	Apocynaceae	elephant vine	Assessment	Pacific	2	evaluate
Strophanthus gratus	Apocynaceae	climbing oleander	Assessment	Pacific	0	low risk
Strophanthus preussii	Apocynaceae	climbing oleander	Assessment	Pacific	0	low risk
Strychnos toxifera	Loganiaceae	strychnine	Assessment	U.S. (Florida)	-2	accept
Stylosanthes guianensis	Fabaceae	stylo	Assessment	Australia	12	reject
Stylosanthes guianensis	Fabaceae	stylo	Assessment	Pacific	11	high risk
*Stylosanthes scabra*	Fabaceae	shrubby stylo	Assessment	Pacific	1	low risk*
*Suriana maritima*	Surianaceae	bay cedar	Assessment	Pacific	2	evaluate**
Swietenia macrophylla	Meliaceae	large-leaf mahogany	Assessment	Pacific	4	evaluate
*Swietenia mahagoni*	Meliaceae	West Indian mahogany	Assessment	Pacific	2	low risk*
Syagrus romanzoffiana	Arecaceae	queen palm	Assessment	Pacific	-2	low risk
Synadenium grantii	Euphorbiaceae	African milkbush	Assessment	Pacific	4	low risk*
Synadenium grantii	Euphorbiaceae	African milkbush	Assessment	U.S. (Florida)	3	accept
*Syngonium auritum*	Araceae	five-fingers	Assessment	Pacific	1	low risk*
Syngonium podophyllum	Araceae	arrowhead plant	Assessment	Pacific	15	high risk
Synsepalum dulcificum	Sapotaceae	miracle fruit	Assessment	Pacific	-3	low risk
Syzygium australe	Myrtaceae	brush cherry	Assessment	Pacific	15	high risk
Syzygium cumini	Myrtaceae	Java plum	Assessment	Pacific	9	high risk
Syzygium cumini	Myrtaceae	Java plum	Assessment	U.S. (Florida)	9	reject
Syzygium jambos	Myrtaceae	Malabar-plum	Assessment	Pacific	20	high risk
Syzygium malaccense	Myrtaceae	mountain apple	Assessment	Pacific	0	low risk
Syzygium polyanthum	Myrtaceae	Indian bayleaf	Assessment	Pacific	7	high risk