United States

Agrimony

Agrimonia eupatoria

Near Threatened

Ajuga

Ajuga reptans

Alder

Alnus glutinosa

Alder leaf beetle

Agelastica alni

Alder Spittlebug

Aphrophora alni

All Species in United States

Silver hairgrass

Aira cupaniana

Silver july croton

Croton argenteus

Silverleaf cotoneaster

Cotoneaster pannosus

Silver Leaf Disease

Chondrostereum purpureum

Silver leafhopper

Athysanus argentarius

Silverleaf mountain gum

Eucalyptus pulverulenta

Silverleaf nightshade

Solanum elaeagnifolium

Silver Meadow

Boloria selene

Extinct

Silver-Moss

Bryum argenteum

Silver ragwort

Jacobaea maritima

Silver sage

Salvia argentea

Silversheath knotweed

Polygonum argyrocoleum

Silver wattle

Acacia dealbata

Silver wattle

Acacia retinodes

Silvery-Flowered Sedge

Carex argyrantha

Extinct

Simon bamboo

Pleioblastus simonii

Simon poplar

Populus simonii

Simons' cotoneaster

Cotoneaster simonsii

Simpleleaf bushweed

Flueggea acidoton

Simpleleaf chastetree

Vitex trifolia

Simple-stem everlasting

Gamochaeta simplicicaulis

Sinewed Bush Lichen

Ramalina americana

Singapore holly

Malpighia coccigera

Single-Dotted Wave

Idaea dimidiata

Single-Spored Map Lichen

Rhizocarpon disporum

Sinkwa towelsponge

Luffa acutangula

Sinoper Lichen

Acarospora sinopica

Sisal hemp

Agave sisalana

Sitka Brome

Bromus sitchensis

Six-Celled Moss Dot Lichen

Bilimbia sabuletorum

Six-Spotted Orbweaver

Araniella displicata

Six-spotted spider beetle

Ptinus sexpunctatus

Sixweeks threeawn

Aristida adscensionis

Skeleton shrimp

Caprella equilibra

Skillet Clubtail

Gomphurus ventricosus

Skimming Bluet

Enallagma geminatum

Skin beetle

Dermestes peruvianus

Skin beetle

Thorictodes heydeni

Skin beetle

Trogoderma angustum

Ski-tipped Emerald

Somatochlora elongata

Skyblue clustervine

Jacquemontia pentanthos

Sky plant

Tillandsia ionantha

Slash pine

Pinus elliottii

Slaty-backed Gull

Larus schistisagus

Slaty Skimmer

Libellula incesta

Sleepy Orange

Abaeis nicippe

Slender amaranth

Amaranthus viridis

slender beaked moss

Kindbergia praelonga

Slender Bedstraw

Galium pumilum

Near Threatened

Slender bird's-foot trefoil

Lotus angustissimus

Slender Bluet

Enallagma traviatum

Slender centaury

Centaurium tenuiflorum

Slender Cliff Fern

Woodsia gracilis

Slender Coral

Ramariopsis subtilis

Near Threatened

Slender Cottongrass

Eriophorum gracile

Slender Cottonweed

Froelichia gracilis

Slender Crabgrass

Digitaria filiformis

Extinct

Slender Dogtooth Moss

Cynodontium gracilescens

Slender dwarf morning-glory

Evolvulus alsinoides

Slender false garlic

Nothoscordum gracile