Scirpus pungens (common three-square bulrush) 632 -- side infl; thinner stem; (see S americanus)

Scirpus robustus (robust bulrush) 634 --

Scirpus rufus (reddish bulrush) 633 --

Scirpus smithii (Smith's bulrush) 632 --

Scripus sp. (bulrush) Cyperaceae --

Scirpus subterminalis (water bulrush) 632 --

Scirpus supinus (supine bulrush) 632 -- mid-stem infl

Scirpus torreyi (Torrey three-square bulrush) 632 --

Scirpus validus (soft stem bulrush) 633 -- infl at top; spikelets more reddish brown; stem soft (see S. acutus)

Scirpus verecundus (bashful bulrush) 631 -- solitary, terminal spikelet; dry fields & open woods

Scleranthus annuus (knawel) Caryophyllaceae (0 5 1-10 2 sup) 105 -- calyx 5 green lobes w narrow white margins

Scleria minor (lesser whip grass) 659 -- achene smooth & shining; base white

Scleria oligantha (few-flowered whip grass) 659 -- achene smooth & shining; base brown; wet meadows & woods

Scleria pauciflora (Carolina whip grass) 659 -- achene rough or reticulate; base with tubercles

Scleria reticularis (reticulate whip grass) 660 -- achene rough or reticulate; base with 3 lobes like a calyx

Scleria sp. (whip grass) Cyperaceae -- achenes bony or crustaceous, us white or whitish, blobose to ovoid; sandy soil; pine barrens; often coastal

Scleria triglomerata (three-clustered whip grass) 659 -- achene smooth & shining;

Scleria verticillata (whorled whip grass) 659 -- achene rough or reticulate; base flat, very low, unlobed Scrophularia lanceolata (hare figwort) Scrophulariaceae/Scrophularieae ((5) (5) 4+1 1 stigma 1) 446 -- undeveloped stamen greenish-yellow; OT

Scrophularia marilandica (Maryland figwort) Scrophulariaceae/Scrophularieae ((5) (5) 4+1 1 stigma 1) 446 -- undev stmn prpl-br; OT not as toohed

Scrophularia nodosa Scrophulariaceae /Scrophularieae ((5) (5) 4+1 1 stigma 1) 446 --

Scrophulariaceae (distinct spur) -- Antirrhinum, Chaenorrhinum, Cymbalaria, Kickxia, Linaria

Scrophulariaceae (alt lvs) -- Castilleja, Digitalis, Limosella, Orthocarpus, Pedicularis, Schwalbea, Verbascum

Scrophulariaceae (opp 2 stamens) -- Gratiola, Lindernia, Veronica, Veronicastrum

Scrophulariaceae (opp 4 stamens cor galeate) -- Euphrasia, Melampyrum, Odontites, Pedicularis, Rhinanthus

Scrophulariaceae (opp 4 stamens not galeate) -- Agalinis, Aureolaria, Buchnera, Chelone, Lindernia, Mazus, Mimulus, Penstemon, Scrophularia Scutellaria arguta (Appalachian skullcap) 410 --

Scutellaria elliptica (hairy skullcap) 410 --infl terminal; OT short-stalked, rounded tooth; stem hairy

Scutellaria galericulata (marsh skullcap) 411 -- fls axillary, 2/3-1"; OT sessile or nearly, lance/oblong

Scutellaria incana (downy skullcap) 410 -- infl terminal; OT long-stalked, coasrsely toothed, ptd.; stem w fine downy

Scutellaria integrifolia (hyssop skullcap) 410 -- OE lance

Scuttellaria lateriflora (maddog skullcap) 411 -- fls axillary, under 1/2", 1-sided racemes; OT coarse, egg

Scutellaria leonardii (skullcap) Lamiaceae 411 --

Scutellaria nervosa (veined skullcap) 412 -- fls axillary 1/3"; OT blunt, egg-shaped

Scutellaria ovata (forest or heart-leaved skullcap) 409 -- infl terminal;

Scutellaria parvula (small skullcap) 411 -- fls blue 1/4" long; OE egg

Scutellaria saxatilis (rock skullcap) 410 --

Scutellaria serrata (Allegheny or showy skullcap) 410 -- infl terminal; OT coarse, ptd

Scutellaria sp. (skullcap) Lamiaceae ((5) (5) 2+2 1) --

Scutellaria x churchilliana (churchill skullcap) 411 --

Secale cereale (rye) Poaceae 730 -- stiff bristles somewhat overtopping infl; infl droops, green at first, yellow when ripe

Sedum acre (golden carpet stonecrop) 209 -- yellow, pointed pets; AE succ; plant 1-3"; lvs look like fruits

Sedum hispanicum 209 -- white w pink or green midvein

Sedum purpureum (live forever) 208 -- fls deep pink; lvs sessile, succulent, green; AT toothed only on upper 1/2

Sedum reflexum 210 -- fls yellow

Sedum rosea (roseroot) -- purplish(pistillate), yellowish (staminate); WE succulent

Sedum sarmentosum 209 -- fls yellow

Sedum sp. (stonecrop) Crassulaceae (4-5 4-5 8-10 1) --

Sedum spurium 208 -- AT sharply toothed

Sedum telephioides (garden sedum) 208 -- pale pink or white; AE but w/ wavy margins & lvs whitened

Sedum ternatum 209 -- creeping; white in 3-branched term cluster; WE 3 (lower), spatulate

Sempervivum tectorum (hen & chicken) Crassulaceae (6-40 6-40 12-80 1) 210

Senecio aureus (golden ragwort) 525 -- AT/AL heart-shaped lvs at bottom

Senecio jacobaea (tansy ragwort) 526 -- annual; AD lobed & toothed like oak

Senecio obovatus (round-leaved ragwort) 524 -- basal lvs spatulate & toothed, tip squared off

Senecio pauperculus (balsam ragwort) 524 -- basal lvs spatulate & toothed

Senecio sp. (ragwort) Asteraceae/Senecioneae --

Senecio viscosus (sticky groundsel) 525 -- annual; rays inconsp; bracteoles not black-tipped; weed

Senecio vulgaris (common groundsel) 524 -- annual; golden yellow, no rays; bracteols bl-tipped; Al lvs very lobed; weed

Seseli libanotis Apiaceae (5 5 5 2) 349 --

Sesuvium maritimum (sea purslane) Aizoaceae 085 -- 0 5 5-N 3-5;

Setaria faberi (Faber's or nodding foxtail) 766 -- bristles mostly 1-3; 5-20 dm; drooping; weed of fields & waste pls.

Setaria geniculata (knotroot foxtail grass) 766 -- bristles mstly 4-12 below each spklt; infl erect; 3-10dm; grn or tawny; moist, grdns, salt marshes, & waste pls.

Setaria glauca (yellow foxtail grass) 766 -- bristles mostly 4-12 below each spikelet; infl erect; 3-13dm; yellow brown; us. erect; cultivated soil & waste pls.

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