Canada

Ajuga

Ajuga reptans

Alder

Alnus glutinosa

Alexanders

Angelica atropurpurea

Allegheny Serviceberry

Amelanchier arborea

alpine lady's-mantle

Alchemilla alpina

All Species in Canada

scarlet beeblossom

Oenothera suffrutescens

scarlet malachite beetle

Malachius aeneus

Scentless false mayweed

Tripleurospermum inodorum

scentless mock-orange

Philadelphus inodorus

Schreber'S Aster

Eurybia schreberi

Schweinitz's cyperus

Cyperus schweinitzii

scopolia

Scopolia carniolica

Scorched Alpine-Sedge

Carex atrofusca

Scotch broom bruchid

Bruchidius villosus

Scottish false asphodel

Tofieldia pusilla

scratch grass

Muhlenbergia asperifolia

Scrub Pine

Pinus virginiana

Scrub Pine

Pinus albicaulis

seabeach angelica

Angelica lucida

Sea Bindweed

Calystegia soldanella

sea-buckthorn

Hippophae rhamnoides

Sea-Coast Tuber-Bulrush

Bolboschoenus robustus

sea-holly

Eryngium maritimum

sea lamprey

Petromyzon marinus

sea milkwort

Lysimachia maritima

sea rocket

Cakile maritima

Seashore Sedge

Carex marina

Seaside barley

Hordeum marinum

Extinct

Seaside Koniga

Lobularia maritima

sea thread hydroid

Obelia dichotoma

Sea Vase

Ciona intestinalis

Sedge

Carex vacillans

Seed bug

Megalonotus sabulicola

Seed bug

Peritrechus convivus

Seine Riverbank Ground Beetle

Bembidion tetracolum

Semi-striated pill beetle

Simplocaria semistriata

Seneca Root

Polygala senega

Sessile Bellwort

Uvularia sessilifolia

Sevenbark

Hydrangea arborescens

Shade Moonwort

Botrychium tenebrosum

Shallon

Gaultheria shallon

sharped-leaved fluellen

Kickxia elatine

sharp-wing monkey-flower

Mimulus alatus

Sheathed Sedge

Carex vaginata

sheet-web spiders

Erigone dentosa

Shellflower

Moluccella laevis

Shepherd's-needle

Scandix pecten-veneris

Critically Endangered

Shepherd's purse

Capsella bursa-pastoris

Shining Clubmoss

Huperzia lucidula

Shining feather-winged beetle

Ptenidium nitidum

Shining geranium

Geranium lucidum

Shining spurge

Euphorbia lucida

Shiny riverbank ground beetle

Bembidion lampros

Shiny spider beetle

Mezium affine

Shore Aster

Symphyotrichum tradescantii

short-fruited waterwort

Elatine brachysperma

short-fruited willowherb

Epilobium obscurum

Short-Headed Rush

Juncus brachycephalus

Short-Leaved Sedge

Carex disperma

short-ray fleabane

Erigeron lonchophyllus

Short's aster

Symphyotrichum shortii

short-stem iris

Iris brevicaulis

Short-winged firefly

Phosphaenus hemipterus

Showy baby's-breath

Gypsophila elegans

showy lobelia

Lobelia speciosa