Setaria italica (foxtail millet) Poaceae 767 -- bristles mostly 1-3; occ. found as a weed; like S viridis but with larger spikelets ca 3mm

Setaria magna (salt marsh fox tail grass) 767 -- bristles mostly 1-3; 1-4m; curved or nodding, often interrupted near the base; coastal salt marshes

Setaria sp. (fox tail grass) Poaceae -- bristles mostly 1-3

Setaria verticillata (bur foxtail grass) 766 -- bristles mostly 1-3; 3-10dm; erect, yellow-green or purplish; weed in gardens & greenhouses & along stream banks

Setaria viridis (green foxtail grass) 766 -- bristles mostly 1-3; 2-25 dm; green or purple hairs; erect or sl. nodding; cosmopolitan Shepherdia canadensis (rabbit berry) Elaeagnaceae 288 -- 0 4 8 0/0 4 0 1; sepals greenish-yellow within; fr red or sometimes yellow

Sherardia arvensis (field madder) Rubiaceae ((4) 4 4 1 epi) 473 --

Sicyos angulatus (bur cucumber) Cucurbitaceae 151 -- hairy vine; greenish-white fls; sticky hairy pedicels

Sida spinosa (prickly sida) Malvaceae (5 5 5 1 hypo) 137

Sigesbeckia orientalis Asteraceae/Heliantheae 503 --

Silene antirrhina (sleepy catchfly) 110 -- white or pink fls

Silene armeria (sweet william catchfly) -- pink or lavender fls

Silene caroliniana (wild pink) 110 -- pink pets broadest at tip; OE & basal rosette, lance

Silene conica (conical campion) 110 -- white to reddish fls, calyx about 30-veined

Silene dichotoma (forking campion) 110 -- white to reddish fls

Silene dioica (red campion) Caryophyllaceae (5 5 10 5 sup) 108 -- red-purple or pink fls; plants densely pubescent throughout

Silene gallica (French campion) Caryophyllaceae (0 5 10 3 sup) 110 -- white to pink fls; plants densely pubescent throughout

Silene latifolia (white campion) Caryophyllaceae (5 5 10 5 sup) 108 -- fls white

Silene nivea (white campion) Caryophyllacae (5 5 10 3 sup) 109 -- white fls; woods

Silene noctiflora (sticky cockle) 108 -- pink over yellow fls; plants densely pubescent throughout

Silene nutans (nodding campion) 110 -- pink or white fls; lvs basally disposed

Silene sp. (campion) Caryophyllaceae (5 5 10 3 sup) --

Silene stellata (star campion) 109 -- white pets, deeply fringed; middle lvs WE

Silene virginica (fire pink) 108 -- br red fls

Silene vulgaris (bladder campion) 109 -- white fls Silphium compositum (lesser basal-leaved cup plant) 512 -- lvs 5-lobed or no lobes

Silphium laciniatum (compass cup plant) 512 -- lvs many & deeply lobed

Silphium perfoliatum (cup plant) 512 -- lvs with definite cup

Silphium sp. (cup plant) Asteraceae/Heliantheae --

Silphium terebinthinaceum (basal-leaved cup plant) 512 -- lvs more like Rumex Simaroubaceae (quassia) -- Ailanthus (tree of heaven) Sinapis alba (white mustard) Brassicaceae (4 4 4+2 1) 162 -- fr bristly; white fls; beak length = 3 round fr pods

Sinapis arvensis (charlock mustard) Brassicaceae (4 4 4+2 1) 162 -- fr us glabrous; yellow fls; bean-pod fr w long, thin beak

Sisymbrium altissimum (tumble mustard) Brassicaceae (4 4 4+2 1) 180 -- upper lvs divided into very narrow segments

Sisymbrium loeselii (tall hedge mustard) Brassicaceae (4 4 4+2 1) 181

Sisymbrium officinale (hedge mustard0 Brassicaceae (4 4 4+2 1) 180 -- frs hug stem; waste pls; common

Sisyrinchium albidum (blue-eyed grass) Iridaceae (3 3 3 3) 808 -- white to violet fls

Sisyrinchium angustifolium (blue-eyed grass) Iridaceae (3 3 3 3) 809 -- blue fls; stem broadly winged; bright green plant

Sisyrinchium atlanticum (blue-eyed grass) Iridaceae (3 3 3 3) 809 -- blue-violet fls; stem scarcely or narrowly winged; lt green plant

Sisyrinchium fuscatum (blue-eyed grass) Iridaceae (3 3 3 3) 808 -- violet fls; pedunculate

Sisyrinchium montanum (blue-eyed grass) Iridaceae (3 3 3 3) 808-- bright violet fls

Sisyrinchium mucronatum (blue-eyed grass) Iridaceae (3 3 3 3) 808 -- bright violet (white) fls

Sium suave (water parsnip) Apiaceae (5 5 5 2) 355 --

Smilacina racemosa (false Solomon's seal) Lilaceae (3 3 6 3) 800 -- fls & frs at end of stalk in a panicle; stem us finely hairy; lvs in 2 ranks

Smilacina stellata (star-flowered false Solomon's seal) Liliaceae (3 3 6 3) 800 -- raceme; lvs 6 or more

Smilacina trifolia (three-leaved false Solomon's seal) Liliaceae (3 3 6 3) 800 -- raceme; lvs 1-4, glabrous; wet woods & sphagnum bogs

Smilax glauca (sawbrier greenbrier) Smilacaceae (3 3 3 1or0 unisex sup) 805 -- lvs white beneath; fr black, us glaucous

Smilax herbacea (carrion flower greenbrier) Smilacaceae (3 3 3 1or0 unisex sup) 805 -- lf base not heart-shpd, 3 mn veins; unarmd; fr blue, glaucous

Smilax hispida (bristly greenbrier) Smilacaceae (3 3 3 1or0 unisex sup) 805 -- stem bristly; fr black

Smilax laurifolia (laurel-leaved greenbrier) Smilacaceae (3 3 3 1or0 unisex sup) 806-- oblng, 3 nerved, outer nerves clse to lf mrgn; fr prpl to black

Smilax pseudochina (halberd-leaved greenbrier) Smilacaceae (3 3 3 1or0 unisex sup) 804 -- unarmed; fr black, us glaucous

Smilax rotundifolia (round-leaved greenbrier) Smilacaceae (3 3 3 1or0 unisex sup) 806 -- fr black, us glaucous

Solanaceae -- Datura, Hyoscyamus, Leucophysalis, Lycium, Nicandra, Physalis, Solanum

Solanum carolinense (horse nettle nightshade) Solanaceae ((5) (5) 5 2 hypo) 380 -- white or violet; AL & lvs ovate

Solanum dulcamara (bittersweet nightshade) Solanaceae ((5) (5) 5 2 hypo) 379 -- violet or purple; AL; vine; plants unarmed

Solanum elaeagnifolium (silverleaf nightshade) Solanaceae ((5) (5) 5 2 hypo) 381 -- lvs linear to oblont; violet fls

Solanum nigrum (black nightshade) Solanaceae ((5) (5) 5 2 hypo) 379 -- white; AE; plants unarmed

Solanum rostratum (buffalo bur) Solanaceae ((5) (5) 5 2 hypo) -- yellow; AL; calyx tube spiny; lvs many-lobed like Chelidonium

Solanum sarrachoides (hairy nightshade) Solanaceae ((5) (5) 5 2 hypo) 379 -- plants unarmed; white fls; weed in disturbed habitats

Solanum sisymbriifolium (sticky nightshade) Solanaceae ((5) (5) 5 2 hypo) 380 -- violet or blue fls; calyx tube spiny; big lvs, many-lobed

Solanum triflorum (cut-leaved nightshade) Solanaceae ((5) (5) 5 2 hypo) 380 -- plants unarmed; white fls; lvs many-lobed like oak

Solidago arguta (forest goldenrod) 539 -- plume; basal lvs sharply double-toothed

Solidago bicolor (silverrod goldenrod) 534 -- wand-like; white

Solidago caesia (blue-stemmed goldenrod) 537 -- axillary; stem arching, bluish

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