501. Twisted Sedge
Carex torta
502. Arctic Brome
Bromus kalmii
503. Howell’s Pussytoes
Antennaria howellii
504. Bog Rush
Juncus biflorus
505. Netted Chainfern
Lorinseria areolata
506. Northern Evening Primrose
Oenothera parviflora
507. Mock Bishopweed
Ptilimnium capillaceum
508. Virginia Chainfern
Anchistea virginica
509. Virginia Water Horehound
Lycopus virginicus
510. Roundleaf Greenbrier
Smilax rotundifolia
511. Cat Greenbriar
Smilax glauca
512. Swamp Candles
Lysimachia terrestris
513. Annual Fleabane
Erigeron annuus
514. Whorled Wood Aster
Oclemena acuminata
515. Virginia Three-Seed Mercury
Acalypha virginica
516. Slender Threeseed Mercury
Acalypha gracilens
517. Swamp Dewberry
Rubus hispidus
518. Southern Wood-Sorrel
Oxalis dillenii
519. Rattlesnake Fern
Botrypus virginianus
520. Small Beggarticks
Bidens discoidea
521. Twoheaded Water-Starwort
Callitriche heterophylla
522. Cinnamon Fern
Osmunda cinnamomea
523. Purple Cliffbrake
Pellaea atropurpurea
524. Northern St. John’s-Wort
Hypericum boreale
525. Humped Bladderwort
Utricularia gibba
526. Stiff Marsh Bedstraw
Galium tinctorium
527. Yellow Flatsedge
Cyperus flavescens
528. Smooth Sawgrass
Cladium mariscoides
529. Smooth Cordgrass
Sporobolus alterniflorus
530. Rough Avens
Geum laciniatum
531. Clammy Groundcherry
Physalis heterophylla
532. Wavy Hairgrass
Avenella flexuosa
533. Smooth White Oldfield Aster
Symphyotrichum racemosum
534. Dwarf Red Blackberry
Rubus pubescens
535. Pink Fuzzybean
Strophostyles umbellata
536. Trailing Bush-Clover
Lespedeza procumbens
537. Beggarslice
Hackelia virginiana
538. Spring Lady’s Tresses
Spiranthes vernalis
539. Sweetgrass
Anthoxanthum nitens
540. Variable Panicgrass
Panicum commutatum
541. Bog Fern
Coryphopteris simulata
542. Saltmeadow Cordgrass
Sporobolus pumilus
543. Eastern Marsh Fern
Thelypteris palustris subsp. pubescens
544. Leafy Pondweed
Potamogeton foliosus
545. Largeleaf Pondweed
Potamogeton amplifolius
546. Bare-Stemmed Tick-Trefoil
Hylodesmum nudiflorum
547. Whorled Milkwort
Polygala verticillata
548. Violet Lespedeza
Lespedeza violacea
549. Canada Frostweed
Crocanthemum canadense
550. Coontail
Ceratophyllum demersum
551. Marsh Seedbox
Ludwigia palustris
552. Eelgrass
Zostera marina
553. Procumbent Pearlwort
Sagina procumbens
554. Philadelphia Fleabane
Erigeron philadelphicus
555. Hedge Bindweed
Calystegia sepium
556. Beaked Tasselweed
Ruppia maritima
557. False Nutsedge
Cyperus strigosus
558. Virginia Pepperweed
Lepidium virginicum
559. Swamp Smartweed
Persicaria hydropiperoides
560. Bristly-Stalked Sedge
Carex leptalea
561. Tower Rockcress
Turritis glabra
562. Orangefruit Horse-Gentian
Triosteum aurantiacum
563. Dotted Smartweed
Persicaria punctata
564. Eastern Poison Ivy
Toxicodendron radicans
565. Yellow Fringed Orchid
Platanthera ciliaris
566. Prairie Wedgescale
Sphenopholis obtusata
567. Canada Lettuce
Lactuca canadensis
568. Littleleaf Buttercup
Ranunculus abortivus
569. Sand Blackberry
Rubus cuneifolius
570. Canada Nettle
Laportea canadensis
571. Carolina Horsenettle
Solanum carolinense
572. Fall Panicgrass
Panicum dichotomiflorum
573. Maryland Sanicle
Sanicula marilandica
574. Tall Blue Lettuce
Lactuca biennis
575. Setose Blackberry
Rubus ×setosus
576. American Lopseed
Phryma leptostachya
577. Winter Bentgrass
Agrostis hyemalis
578. Smooth Yellow False Foxglove
Aureolaria flava
579. Swamp Dock
Rumex verticillatus
580. Greater Water Dock
Rumex britannica
581. Lamb’s Quarters
Chenopodium album
582. Indian Pipe
Monotropa uniflora
583. Fireweed
Chamerion angustifolium
584. Arrowleaf Tearthumb
Persicaria sagittata
585. Purple Sandgrass
Triplasis purpurea
586. Prairie Cordgrass
Sporobolus michauxianus
587. Bluntlobe Cliff Fern
Physematium obtusum
588. Pointedleaf Ticktrefoil
Hylodesmum glutinosum
589. Appalachian Sandcherry
Prunus susquehanae
590. Rattlesnake Root
Nabalus altissima
591. Low False Bindweed
Calystegia spithamaea
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