501. Summer Grape
Vitis aestivalis
502. Northern Bugleweed
Lycopus uniflorus
503. Bristly Buttercup
Ranunculus hispidus
504. Early Buttercup
Ranunculus fascicularis
505. Yellow Lady’s Slipper
Cypripedium parviflorum
506. Showy Lady’s Slipper
Cypripedium reginae
507. Wheat Sedge
Carex atherodes
508. Knotsheath Sedge
Carex retrorsa
509. Fibrousroot Sedge
Carex communis
510. Arctic Brome
Bromus kalmii
511. Dewey’s Sedge
Carex deweyana
512. Rocky Mountain Fescue
Festuca saximontana
513. White Rattlesnakeroot
Nabalus albus
514. Frost Grape
Vitis vulpina
515. Annual Fleabane
Erigeron annuus
516. Eastern Prickly Gooseberry
Ribes cynosbati
517. American Vetch
Vicia americana
518. Waxflower Shinleaf
Pyrola elliptica
519. Rattlesnake Fern
Botrypus virginianus
520. Cinnamon Fern
Osmunda cinnamomea
521. Threeleaf Goldthread
Coptis trifolia
522. Tuckerman’s Sedge
Carex tuckermanii
523. Smooth Sawgrass
Cladium mariscoides
524. Common Groundcherry
Physalis longifolia
525. Clammy Groundcherry
Physalis heterophylla
526. Grape Honeysuckle
Lonicera reticulata
527. Ontario Aster
Symphyotrichum ontarionis
528. Dwarf Red Blackberry
Rubus pubescens
529. Beggarslice
Hackelia virginiana
530. Fragrant Bedstraw
Galium triflorum
531. Thinleaf Cottonsedge
Eriophorum viridicarinatum
532. Hay Sedge
Carex argyrantha
533. Rigid Sedge
Carex tetanica
534. Grove Bluegrass
Poa alsodes
535. Eastern Marsh Fern
Thelypteris palustris subsp. pubescens
536. Whorled Milkwort
Polygala verticillata
537. Fraser’s Marsh St. Johnswort
Triadenum fraseri
538. Matted Spikerush
Eleocharis intermedia
539. Coontail
Ceratophyllum demersum
540. Philadelphia Fleabane
Erigeron philadelphicus
541. Water Knotweed
Persicaria amphibia
542. Bastard Toadflax
Comandra umbellata
543. Fringed Brome
Bromus ciliatus
544. Bristly-Stalked Sedge
Carex leptalea
545. Broad-Glumed Wheatgrass
Elymus violaceus
546. Southern Lady Fern
Athyrium asplenioides
547. Marsh Speedwell
Veronica scutellata
548. Orangefruit Horse-Gentian
Triosteum aurantiacum
549. Eastern Poison Ivy
Toxicodendron radicans
550. Canada Lettuce
Lactuca canadensis
551. Littleleaf Buttercup
Ranunculus abortivus
552. Canada Nettle
Laportea canadensis
553. Maryland Sanicle
Sanicula marilandica
554. American Lopseed
Phryma leptostachya
555. Hayden’s Sedge
Carex haydenii
556. Swamp Dock
Rumex verticillatus
557. Schweinitz’s Flatsedge
Cyperus schweinitzii
558. Greater Water Dock
Rumex britannica
559. False Melic
Schizachne purpurascens
560. Lamb’s Quarters
Chenopodium album
561. Rock Harlequin
Capnoides sempervirens
562. Indian Pipe
Monotropa uniflora
563. Arrowleaf Tearthumb
Persicaria sagittata
564. Marsh Bellflower
Campanula aparinoides
565. Prairie Cordgrass
Sporobolus michauxianus
566. False Mermaidweed
Floerkea proserpinacoides
567. Cleland’s Evening Primrose
Oenothera clelandii
568. Smooth Rockcress
Borodinia laevigata
569. Hoary Frostweed
Crocanthemum bicknellii
570. Black-Fruited Rice Grass
Oryzopsis racemosa
571. Pointedleaf Ticktrefoil
Hylodesmum glutinosum
572. Downy Willowherb
Epilobium strictum
573. Low False Bindweed
Calystegia spithamaea
574. Narrowleaf Wild Leek
Allium burdickii
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