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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