Flora of Philadelphia
Locality: Philadelphia, Pennsylvania

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Families: 176
Genera: 833
Species: 2132
Total Taxa: 2187

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Image source: all images linked voucher images only

Sanicula gregaria
Clustered Black-Snakeroot
Sanicula marilandica
Maryland Black-Snakeroot
Sanicula odorata
Clustered Black-Snakeroot
Sanicula trifoliata
Large-Fruit Black-Snakeroot
Saponaria officinalis
Bouncing-Bett
Satureja hortensis
Summer Savory
Satureja vulgaris
Wild Basil
Saururus cernuus
Lizard's-Tail
Saxifraga pensylvanica
Eastern Swamp Pseudosaxifrage
Saxifraga virginiensis
Early Pseudosaxifrage
Schoenoplectus fluviatilis
River Wood Club-Rush
Schoenoplectus purshianus
Weak-Stalk Bulrush
Schoenoplectus robustus
Seaside Wood Club-Rush
Schoenoplectus smithii
Smith’s Bulrush
Scirpus atrovirens
Dark-Green Bulrush
Scirpus cyperinus
Cottongrass Bulrush
Scirpus georgianus
Georgia Bulrush
Scirpus hattorianus
Mosquito Bulrush
Scirpus pendulus
Rufous Bulrush
Scirpus polyphyllus
Leafy Bulrush
Scirpus tabernaemontani
softstem bulrush
Scleranthus annuus
Annual Knawel
Scleria pauciflora
Few-Flower Nut-Rush
Scleria reticularis
Netted Nut-Rush
Scolymus hispanicus
Common Golden-Thistle
Scrophularia lanceolata
Lance-Leaf Figwort
Scrophularia marilandica
Carpenter's-Square
Scutellaria elliptica
Hairy Skullcap
Scutellaria galericulata
Hooded Skullcap
Scutellaria incana
Hoary Skullcap
Scutellaria lateriflora
Mad Dog Skullcap
Scutellaria leonardii
Small Skullcap
Scutellaria nervosa
Veiny Skullcap
Scutellaria parvula
Small Skullcap
Sedum acre
Mossy Stonecrop
Sedum sarmentosum
Stringy Stonecrop
Sedum ternatum
Woodland Stonecrop
Selaginella apoda
Meadow Spike-Moss
Selaginella rupestris
Ledge Spike-Moss
Senecio erucifolius
Hoary Ragwort
Senecio vulgaris
Old-Man-in-the-Spring
Senna hebecarpa
American Wild Sensitive-Plant
Senna marilandica
Maryland Wild Sensitive-Plant
Sericocarpus asteroides
Toothed White-Top-Aster
Sericocarpus linifolius
Narrow-Leaf White-Top-Aster
Sesbania macrocarpa
Egyptian River-Hemp
Sesuvium pentandrum
Slender Sea-Purslane
Setaria ambigua
Foreward-Barb Bristle Grass
Setaria faberi
Japanese Bristle Grass
Setaria geniculata
Marsh Bristle Grass
Setaria glauca
Pearl Millet
Setaria italica
Italian Bristle Grass
Setaria lutescens
Pearl Millet
Sherardia arvensis
Blue Field-Madder
Sicyos angulatus
One-Seed Burr-Cucumber
Sida linifolia
Flax-Leaf Fanpetals
Sida spinosa
Prickly Fanpetals
Sida stipulata
Common-Wireweed
Sigesbeckia orientalis
Common St. Paul's-Wort
Silene antirrhina
Sleepy Catchfly
Silene armeria
Sweet-William Catchfly
Silene caroliniana
Sticky Catchfly
Silene cucubalus
Maiden's-Tears
Silene dichotoma
Forked Catchfly
Silene latifolia
Bladder-Campion
Silene noctiflora
Night-Flowering Catchfly
Silene stellata
Widow's-Frill
Silphium integrifolium
Entire-Leaf Rosinweed
Silybum marianum
Blessed Milk-Thistle
Sinapis arvensis
Corn-Mustard
Sisymbrium altissimum
Tall Hedge-Mustard
Sisymbrium irio
London Rocket
Sisymbrium officinale
Hedge-Mustard
Sisymbrium polyceratium
Short-Fruit Hedge-Mustard
Sisyrinchium angustifolium
Narrow-Leaf Blue-Eyed-Grass
Sisyrinchium mucronatum
Needle-Tip Blue-Eyed-Grass
Sium suave
Hemlock Water-Parsnip
Smilacina racemosa
Feathery False Solomon's-Seal
Smilacina stellata
Starry False Solomon's-Seal
Smilax glauca
Sawbrier
Smilax herbacea
Smooth Carrion-Flower
Smilax pulverulenta
Downy Carrion-Flower
Solanum americanum
American Black Nightshade
Solanum carolinense
Carolina Horse-Nettle
Solanum dulcamara
Bitter Nightshade
Solanum linnaeanum
American Black Nightshade