
501. Annual Wall-Rocket
Diplotaxis muralis

502. Setose Blackberry
Rubus ×setosus

503. Alkali Buttercup
Ranunculus cymbalaria

504. Winter Bentgrass
Agrostis hyemalis

505. Hayden’s Sedge
Carex haydenii

506. Broad-Leaved Helleborine
Epipactis helleborine

507. Smooth Yellow False Foxglove
Aureolaria flava

508. Swamp Dock
Rumex verticillatus

509. Greater Water Dock
Rumex britannica

510. False Melic
Schizachne purpurascens

511. Common Knotgrass
Polygonum aviculare

512. Pale Persicaria
Persicaria lapathifolia

513. Rock Harlequin
Capnoides sempervirens

514. Indian Pipe
Monotropa uniflora

515. Arrowleaf Tearthumb
Persicaria sagittata

516. Marsh Bellflower
Campanula aparinoides

517. Marsh Cudweed
Gnaphalium uliginosum

518. Purple Sandgrass
Triplasis purpurea

519. Prairie Cordgrass
Sporobolus michauxianus

520. Gaywings
Polygaloides paucifolia

521. Climbing False Buckwheat
Fallopia scandens

522. Bluntlobe Cliff Fern
Physematium obtusum

523. Shrubby Fivefingers
Sibbaldia tridentata

524. American Searocket
Cakile edentula

525. Hoary Frostweed
Crocanthemum bicknellii

526. African Tephrosia
Tephrosia subtriflora

527. Snailseed Pondweed
Potamogeton bicupulatus

528. Appalachian Sandcherry
Prunus susquehanae

529. Downy Willowherb
Epilobium strictum

530. Low False Bindweed
Calystegia spithamaea

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