• Introduction
• The Information
• The Maps
• Completeness of the County Level Maps
• Aliens
• The Photos
• Taxonomic and Nomenclatural Changes
• Ferns and Other Spore Bearing Vascular Plants
• Contributing to the Website
• Acknowledgments

Additions and Name Changes to Michigan Flora

New Species added to the website from the 2016 field season (7 total)

Ampelamus laevis

Botrychium tenebrosum (split from B. simplex)

Crocosmia ×crocosmiiflora

Hypericum swinkianum (newly described split from H. kalmianum)

Liquidambar styraciflua

Microthlaspi perfoliatum

Rhamnus davurica

New Species added to the website from the 2015 field season (6 total)

Alchemilla mollis

Bothriochloa laguroides

Colchicum autumnale

Dioscorea polystachya

Eichhornia crassipes

Galanthus elwesii

Galium pedemontanum

Juncus validus

Nicotiana tabacum

Nymphoides peltata

Pistia stratiotes

New Species added to the website from the 2014 field season (11 total)

Allium carinatum

Chelone lyonii

Jasione montana

Juncus dichotomus

Juncus ranarius

Juncus pylaei

Luzula luzuloides

Rubus parvifolius
Senecio vernalis

Senecio viscosus

Tanacetum coccineum

New Species added to the website from the 2013 field season (6 total)

Elsholtzia ciliata

Hedera helix

Myriophyllum aquaticum

Picea pungens

Rubus phoenicolasius

Schoenoplectiella mucronata

New Species added to the website from the 2012 field season (27 total)

Acalypha ostryifolia

Agastache rugosa

Anemone blanda

Aralia spinosa

Artemisia serrata

Aronia arbutifolia

Arthraxon hispidus

Chenopodium polyspermum

Cyperus iria

Eranthis hyemalis

Eriochloa contracta

Euphorbia serpens

Exochorda racemosa

Geranium sibiricum

Hibiscus syriacus

Hydrocotyle ranunculoides

Iris ×vinicolor

Magnolia acuminata

Molinia caerulea

Napaea dioica

Nicotiana alata

Phyllostachys nigra

Pinus rigida

Spiraea nipponica

Spiraea prunifolia

Tripidium ravennae

Viburnum sieboldii

 

Additions and Name Changes to Michigan Flora, Volumes 1-3, in the "Field Manual"

Acalypha gracilens — add

Acer campestre — add

Acer ginnala — add

Acer nigrum — add (split from A. saccharum)

Acinos arvensis — Clinopodium acinos

Aconitum napellus — add

Acorus americanus — add (split from A. calamus)

Aegilops cylindrica — add

Agropyron cristatum — add

Agropyron dasystachyum — Elymus lanceolatus

Agropyron repens — Elymus repens

Agropyron smithii — Pascopyrum smithii

Agropyron spicatum — Pseudoroegneria spicata

Agropyron trachycaulum — Elymus trachycaulus

Agrostis scabra — add (split from A. hyemalis)

Agrostis tenuis — Agrostis capillaris

Aira caryophyllea — add

Alisma plantago-aquatica — delete (split into A. subcordatum & A. triviale)

Alisma subcordatum — add (split from A. plantago-aquatica)

Alisma triviale — add (split from A. plantago-aquatica)

Allium burdickii — add (split from A. tricoccum)

Allium tuberosum — add

Alnus crispa — Alnus viridis

Alnus rugosa — Alnus incana

Alopecurus geniculatus — add

Alopecurus myosuroides — add

Alyssum saxatile — Aurinia saxatilis

Amaranthus gracilis — Amaranthus viridis

Ampelopsis aconitifolia — add

Ampelopsis brevipedunculata — add

Andropogon scoparius — Schizachyrium scoparium

Anemonella thalictroides — Thalictrum thalictroides

Anthemis tinctoria — Cota tinctoria

Apera interrupta — add

Apera spica-venti — add

Arabis canadensis — Boechera canadensis

Arabis divaricarpa — Boechera grahamii

Arabis drummondii — Boechera stricta

Arabis glabra — Turritis glabra

Arabis hirsuta — Arabis pycnocarpa

Arabis holboellii — Boechera retrofracta

Arabis laevigata — Boechera laevigata

Arabis lyrata — Arabidopsis lyrata

Arabis missouriensis — Boechera missouriensis

Arabis perstellata — Boechera dentata

Aralia elata — add

Arenaria lateriflora — Moehringia lateriflora

Arenaria macrophylla — Moehringia macrophylla

Arenaria stricta — Minuartia michauxii

Aristolochia macrophylla — Isotrema macrophyllum

Aristolochia serpentaria — Endodeca serpentaria

Armoracia aquatica — Rorippa aquatica

Arnica lonchophylla — add

Aster borealis — Symphyotrichum boreale

Aster brachyactis — Symphyotrichum ciliatum

Aster ciliolatus — Symphyotrichum ciliolatum

Aster cordifolius — Symphyotrichum cordifolium

Aster dumosus — Symphyotrichum dumosum

Aster ericoides — Symphyotrichum ericoides

Aster furcatus — Eurybia furcata

Aster laevis — Symphyotrichum laeve

Aster lanceolatus — Symphyotrichum lanceolatum

Aster lateriflorus — Symphyotrichum lateriflorum

Aster longifolius — Symphyotrichum robynsianum

Aster macrophyllus — Eurybia macrophylla

Aster modestus — Canadanthus modestus

Aster nemoralis — Oclemena nemoralis

Aster novae-angliae — Symphyotrichum novae-angliae

Aster ontarionis — Symphyotrichum ontarionis

Aster oolentangiensis — Symphyotrichum oolentangiense

Aster paternus — Sericocarpus asteroides

Aster pilosus — Symphyotrichum pilosum

Aster praealtus — Symphyotrichum praealtum

Aster puniceus — Symphyotrichum puniceum

Aster sagittifolius — Symphyotrichum urophyllum

Aster sericeus — Symphyotrichum sericeum

Aster shortii — Symphyotrichum shortii

Aster solidagineus — Sericocarpus linifolius

Aster subulatus — Symphyotrichum subulatum

Aster umbellatus — Doellingeria umbellata

Atriplex prostrata — add (split from A. patula)

Barbarea stricta — add

Belamcanda chinensis — Iris domestica

Berberis repens — add

Betula murrayana — add

Betula populifolia — add

Bidens coronatus — Bidens trichosperma

Bouteloua gracilis — add

Brachyelytrum aristosum — add (split from B. erectum)

Brachypodium sylvaticum — add

Brassica alba — Sinapis alba

Brassica kaber — Sinapis arvensis

Bromus molliformis — delete (lump with B. hordeaceus )

Bromus mollis — Bromus hordeaceus

Bromus nottowayanus — add (split from B. pubescens)

Buchloe dactyloides — add

Cacalia atriplicifolia — Arnoglossum atriplicifolium

Cacalia plantaginea — Arnoglossum plantagineum

Calamagrostis inexpansa — delete (lump with C. stricta)

Calamagrostis lacustris — delete( lump with C. stricta)

Calamintha arkansana — Clinopodium arkansanum

Callitriche terrestris — add

Callitriche verna — Callitriche palustris

Caltha natans — add

Calylophus serrulatus — Oenothera serrulata

Calystegia hederacea — Calystegia pubescens

Calystegia macounii — add

Calystegia silvatica — add

Campanula americana — Campanulastrum americanum

Campanula latifolia — add

Cardaria draba — Lepidium draba

Cardaria pubescens — Lepidium appelianum

Carduus crispus — add

Carex acutiformis — add

Carex aenea — Carex foenea

Carex angustior — Carex echinata

Carex artitecta — Carex albicans

Carex assiniboinensis — add

Carex billingsii — add (split from C. trisperma)

Carex bushii — add

Carex cephalantha — Carex echinata

Carex conjuncta — add

Carex convoluta — Carex rosea

Carex duriuscula — add

Carex echinodes — add (split from C. tenera)

Carex emmonsii — Carex albicans

Carex foenea — Carex siccata

Carex grisea — add (split from C. amphibola)

Carex heleonastes — add

Carex howei — delete (lump with C. atlantica)

Carex inops — add (split from C. pensylvanica)

Carex lanuginosa — Carex pellita

Carex meadii — add (split from C. tetanica)

Carex muricata — add

Carex novae-angliae — add

Carex paupercula — Carex magellanica

Carex rosea — Carex radiata

Carex rugosperma — Carex tonsa

Carex sylvatica — add

Carex texensis — add

Carex tincta — add

Carex utriculata — add (split from C. rostrata)

Carex viridistellata — add (split from C. cryptolepis)

Carex wiegandii — add

Carthamus tinctorius — add

Cassia chamaecrista — Chamaecrista fasciculata

Cassia hebecarpa — Senna hebecarpa

Cassia nictitans — Chamaecrista nictitans

Cassia tora — Senna tora

Castanea mollissima — add

Caulophyllum giganteum — add (split from C. thalictroides)

Centaurea maculosa — Centaurea stoebe

Centaurea repens — Rhaponticum repens

Cerastium brachypodum — add (split from C. nutans)

Cerastium pumilum — add

Cerastium velutinum — add (split from C. arvense)

Chaenomeles speciosa — add

Chenopodium ambrosioides — Dysphania ambrosioides

Chenopodium aristatum — Dysphania aristata

Chenopodium berlandieri — add (split from C. album)

Chenopodium botrys — Dysphania botrys

Chenopodium hybridum — Chenopodium simplex

Chenopodium subglabrum — Chenopodium pratericola

Chorispora tenella — add

Chrysanthemum ×superbum — Leucanthemum ×superbum

Chrysanthemum balsamita — Tanacetum balsamita

Chrysanthemum leucanthemum — Leucanthemum vulgare

Chrysanthemum parthenium — Tanacetum parthenium

Chrysanthemum serotinum — Leucanthemella serotina

Chrysopsis camporum — Heterotheca camporum

Chrysopsis villosa — Heterotheca villosa

Cimicifuga racemosa — Actaea racemosa

Circaea lutetiana — Circaea canadensis

Claytonia sibirica — add

Clematis terniflora — add

Cleome hassleriana — Tarenaya hassleriana

Cleome serrulata — Peritoma serrulata

Coelorachis cylindrica — add

Coincya monensis — add

Consolida ambigua — Consolida ajacis

Corispermum americanum — add (split from C. hyssopifolium)

Corispermum orientale — Corispermum villosum

Corispermum pallasii — add (split from C. hyssopifolium)

Cornus stolonifera — Cornus sericea

Coronilla varia — Securigera varia

Corydalis sempervirens — Capnoides sempervirens

Corydalis solida — add

Corynephorus canescens — add

Cotinus coggygria — add

Cotoneaster adpressus — add

Cotoneaster divaricatus — add

Crataegus apiomorpha — Crataegus fluviatilis

Crataegus basilica — Crataegus schuettei

Crataegus beata — delete (lump with C. populnea)

Crataegus brumalis — delete (lump with C. macrosperma)

Crataegus compta — delete (lump with C. populnea)

Crataegus dilatata — Crataegus coccinioides

Crataegus disperma — delete

Crataegus filipes — delete (lump with C. jesupii)

Crataegus foetida — delete (lump with C. intricata)

Crataegus fontanesiana — delete (lump with C. crus-galli)

Crataegus gravis — delete (lump with C. populnea)

Crataegus hillii — Crataegus magniflora

Crataegus immanis — Crataegus compacta

Crataegus iracunda — delete (lump with C. populnea )

Crataegus leiophylla — delete (lump with C. pruinosa)

Crataegus levis — delete (lump with C. populnea)

Crataegus merita — delete (lump with C. macrosperma)

Crataegus nitidula — delete (lump with C. punctata)

Crataegus pedicellata — Crataegus coccinea

Crataegus pinguis — delete (lump with C. brainerdii)

Crataegus pringlei — Crataegus coccinea

Crataegus pringlei — delete (lump with C. coccinea)

Crataegus rugosa — delete (lump with C. pruinosa)

Cyperus aristatus — Cyperus squarrosus

Cyperus filiculmis — Cyperus lupulinus

Cyperus fuscus — add

Cyperus rivularis — Cyperus bipartitus

Cypripedium calceolus — Cypripedium parviflorum

Danthonia compressa — add

Daphne mezereum — add

Dentaria diphylla — Cardamine diphylla

Dentaria laciniata — Cardamine concatenata

Dentaria maxima — Cardamine maxima

Deschampsia flexuosa — Avenella flexuosa

Desmanthus illinoensis — add

Desmodium glabellum — add (split from D. paniculatum)

Desmodium glutinosum — Hylodesmum glutinosum

Desmodium nudiflorum — Hylodesmum nudiflorum

Desmodium perplexum — add (split from D. paniculatum)

Deutzia scabra — add

Diarrhena americana — Diarrhena obovata

Dichanthelium polyanthes — add

Disporum hookeri — Prosartes hookeri

Disporum maculatum — Prosartes maculata

Dodecatheon meadia — Primula meadia

Draba glabella — add

Duchesnea indica — Potentilla indica

Dysphania pumilio — add

Echinochloa esculenta — add (split from E. crusgalli)

Eleocharis atropurpurea — add

Eleocharis caribaea — Eleocharis geniculata

Eleocharis microcarpa — add

Eleocharis nitida — add

Eleocharis olivacea — Eleocharis flavescens

Eleocharis pauciflora — Eleocharis quinqueflora

Eleocharis smallii — Eleocharis palustris

Eleutherococcus sieboldianus — add

Elymus arenarius — Leymus arenarius

Elymus macgregorii — add (split from E. virginicus)

Elymus mollis — Leymus mollis

Epilobium angustifolium — Chamerion angustifolium

Epilobium brachycarpum — add

Eragrostis curvula — add

Eragrostis poaeoides — Eragrostis minor

Eragrostis tephrosanthes — delete (lump with E. pectinacea)

Eragrostis trichodes — add

Eriocaulon septangulare — Eriocaulon aquaticum

Eriophorum spissum — Eriophorum vaginatum

Erophila verna — Draba verna

Euonymus hamiltoniana — add

Eupatorium coelestinum — Conoclinium coelestinum

Eupatorium fistulosum — Eutrochium fistulosum

Eupatorium maculatum — Eutrochium maculatum

Eupatorium purpureum — Eutrochium purpureum

Eupatorium rugosum — Ageratina altissima

Euphorbia davidii — add (split from E. dentata)

Euphorbia esula — Euphorbia virgata

Euphorbia obtusata — Euphorbia spathulata

Euphorbia prostrata — add

Euthamia remota — Euthamia caroliniana

Fatoua villosa — add

Festuca arundinacea — Schedonorus arundinaceus

Festuca obtusa — Festuca subverticillata

Festuca octoflora — Vulpia octoflora

Festuca ovina — Festuca trachyphylla

Festuca pratensis — Schedonorus pratensis

Festuca scabrella — Festuca altaica

Festuca tenuifolia — Festuca filiformis

Ficus carica — add

Filago arvensis — Logfia arvensis

Filipendula ulmaria — add

Filipendula vulgaris — add

Forsythia ×intermedia — add

Frangula purshiana — add

Froelichia floridana — add

Froelichia gracilis — add

Fuirena squarrosa — Fuirena pumila

Galanthus nivalis — add

Galega officinalis — add

Galium mollugo — Galium album

Gaura biennis — Oenothera gaura

Gaura coccinea — Oenothera suffrutescens

Gaura longiflora — Oenothera filiformis

Gentianopsis procera — Gentianopsis virgata

Geranium aequale — add (split from G. molle)

Glyceria melicaria — add

Gnaphalium helleri — Pseudognaphalium micradenium

Gnaphalium macounii — Pseudognaphalium macounii

Gnaphalium obtusifolium — Pseudognaphalium obtusifolium

Gnaphalium purpureum — Gamochaeta purpurea

Gnaphalium sylvaticum — Omalotheca sylvatica

Habenaria blephariglottis — Platanthera blephariglottis

Habenaria ciliaris — Platanthera ciliaris

Habenaria clavellata — Platanthera clavellata

Habenaria dilatata — Platanthera dilatata

Habenaria flava — Platanthera flava

Habenaria hookeri — Platanthera hookeri

Habenaria hyperborea — delete (split into Platanthera aquilonis and P. huronensis)

Habenaria lacera — Platanthera lacera

Habenaria leucophaea — Platanthera leucophaea

Habenaria obtusata — Platanthera obtusata

Habenaria orbiculata — Platanthera orbiculata

Habenaria psycodes — Platanthera psycodes

Habenaria unalascensis — Platanthera unalascensis

Habenaria viridis — Coeloglossum viride

Haplopappus ciliatus — Grindelia ciliata

Hedyotis nigricans — Stenaria nigricans

Heleochloa schoenoides — Crypsis schoenoides

Helianthemum bicknellii — Crocanthemum bicknellii

Helianthemum canadense — Crocanthemum canadense

Hemicarpha micrantha — Lipocarpha micrantha

Heracleum mantegazzianum — add

Heracleum sphondylium — add

Hierochloë odorata — Hierochloë hirta

Holcus mollis — add

Hosta ventricosa — add

Hydrocharis morsus-ranae — add

Hylotelephium erythrostictum — add

Hymenoxys herbacea — Tetraneuris herbacea

Hypericum adpressum — add

Hystrix patula — Elymus hystrix

Iberis sempervirens — add

Ilex opaca — add

Iris sibirica — add

Isopyrum biternatum — Enemion biternatum

Isotrema tomentosum — add

Iva xanthiifolia — Cyclachaena xanthiifolia

Juncus alpinus — Juncus alpinoarticulatus

Juncus anthelatus — add (split from J. tenuis)

Juncus compressus — add

Juncus ensifolius — add

Kalopanax septemlobus — add

Kerria japonica — add

Kochia scoparia — Bassia scoparia

Kuhnia eupatorioides — Brickellia eupatorioides

Lactuca muralis — Mycelis muralis

Lactuca pulchella — Mulgedium pulchellum

Lamiastrum galeobdolon — add

Lamprocapnos spectabilis — add

Lechea villosa — Lechea mucronata

Ledum groenlandicum — Rhododendron groenlandicum

Lemna turionifera — add (split from L. minor)

Leontodon autumnalis — Scorzoneroides autumnalis

Leontodon taraxacoides — Leontodon saxatilis

Leptochloa fascicularis — Leptochloa fusca

Leptoloma cognatum — Digitaria cognata

Lespedeza bicolor — add

Lespedeza intermedia — Lespedeza violacea

Lespedeza stipulacea — Kummerowia stipulacea

Lespedeza thunbergii — add

Lespedeza violacea — Lespedeza frutescens

Leymus racemosus — add

Lilium martagon — add

Limonium platyphyllum — add

Linaria canadensis — Nuttallanthus canadensis

Listera auriculata — Neottia auriculata

Listera convallarioides — Neottia convallarioides

Listera cordata — Neottia cordata

Lithospermum arvense — Buglossoides arvensis

Luzula pallidula — add

Lychnis chalcedonica — Silene chalcedonica

Lychnis coronaria — Silene coronaria

Lycopersicon esculentum — Solanum lycopersicum

Mahonia aquifolium — Berberis aquifolium

Malus baccata — add

Malus prunifolia — add

Malus sieboldii — add

Malva crispa — Malva verticillata

Malva rotundifolia — Malva pusilla

Matricaria perforata — Tripleurospermum inodorum

Matricaria recutita — Matricaria chamomilla

Mazus reptans — Mazus miquelii

Megalodonta beckii — Bidens beckii

Mentha ×gracilis — add (given fuller treatment)

Mentha arvensis — Mentha canadensis

Minuartia dawsonensis — add (split from Arenaria stricta)

Mirabilis hirsuta — delete (lump with M. albida)

Miscanthus sacchariflorus — add

Miscanthus sinensis — add

Monarda clinopodia — add (split from M. fistulosa)

Monotropa hypopithys — Hypopitys monotropa

Muhlenbergia asperifolia — add

Muscari atlanticum — Muscari neglectum

Myosurus minimus — add

Myrica pensylvanica — add

Myriophyllum exalbescens — Myriophyllum sibiricum

Myrrhis odorata — add

Narcissus poeticus — add

Narcissus pseudonarcissus — add

Nasturtium microphyllum — add (split from N. officinale)

Nemopanthus mucronatus — Ilex mucronata

Nuphar pumila — Nuphar microphylla

Nymphaea tetragona — Nymphaea leibergii

Odontites vulgaris — Odontites vernus

Onosmodium molle — Lithospermum molle

Orchis rotundifolia — Amerorchis rotundifolia

Orchis spectabilis — Galearis spectabilis

Oryzopsis canadensis — Piptatherum canadense

Oryzopsis pungens — Piptatherum pungens

Oryzopsis racemosa — Piptatherum racemosum

Osmorhiza chilensis — Osmorhiza berteroi

Oxalis fontana — Oxalis stricta

Oxalis stricta — Oxalis dillenii

Pachysandra terminalis — add

Packera glabella — add

Packera insulae-regalis — add (split from Packera paupercula)

Panicum boreale — Dichanthelium boreale

Panicum calliphyllum — delete

Panicum clandestinum — Dichanthelium clandestinum

Panicum columbianum — Dichanthelium columbianum

Panicum commonsianum — Dichanthelium commonsianum

Panicum commutatum — Dichanthelium commutatum

Panicum depauperatum — Dichanthelium depauperatum

Panicum dichotomum — Dichanthelium dichotomum

Panicum gattingeri — add (split from P. philadelphicum)

Panicum implicatum — Dichanthelium implicatum

Panicum latifolium — Dichanthelium latifolium

Panicum leibergii — Dichanthelium leibergii

Panicum lindheimeri — Dichanthelium lindheimeri

Panicum linearifolium — Dichanthelium linearifolium

Panicum longifolium — add

Panicum meridionale — Dichanthelium meridionale

Panicum microcarpon — Dichanthelium microcarpon

Panicum oligosanthes — Dichanthelium oligosanthes

Panicum perlongum — Dichanthelium perlongum

Panicum praecocius — Dichanthelium praecocius

Panicum sphaerocarpon — Dichanthelium sphaerocarpon

Panicum spretum — Dichanthelium spretum

Panicum tuckermanii — add (split from P. philadelphicum)

Panicum xanthophysum — Dichanthelium xanthophysum

Papaver pseudo-orientale — add (split from P. orientale)

Parietaria diffusa — Parietaria judaica

Parthenium hispidum — delete (lump with P. integrifolium)

Paspalum ciliatifolium — Paspalum setaceum

Paspalum laeve — add

Pennisetum alopecuroides — add

Persicaria robustior — add

Phellodendron amurense — add

Philadelphus ×virginalis — add

Philadelphus coronarius — add

Philadelphus inodorus — add

Philadelphus pubescens — add

Phlox latifolia — add

Physalis pubescens — Physalis grisea

Picea abies — add

Pimpinella saxifraga — add

Pinus nigra — add

Pinus ponderosa — add

Pinus sylvestris — add

Plagiobothrys hirtus — Plagiobothrys figuratus

Platanthera aquilonis — add (split from Habenaria hyperborea)

Platanthera huronensis — add (split from Habenaria hyperborea)

Platanthera macrophylla — add (split from Habenaria orbiculata)

Poa arida — add

Poa canbyi — Poa secunda

Poa interior — add (split from P. nemoralis)

Polygonum amphibium — Persicaria amphibia

Polygonum arifolium — Persicaria arifolia

Polygonum careyi — Persicaria careyi

Polygonum cespitosum — Persicaria longiseta

Polygonum cilinode — Fallopia cilinodis

Polygonum convolvulus — Fallopia convolvulus

Polygonum cuspidatum — Fallopia japonica

Polygonum hydropiper — Persicaria hydropiper

Polygonum hydropiperoides — Persicaria hydropiperoides

Polygonum lapathifolium — Persicaria lapathifolia

Polygonum orientale — Persicaria orientalis

Polygonum pensylvanicum — Persicaria pensylvanica

Polygonum persicaria — Persicaria maculosa

Polygonum punctatum — Persicaria punctata

Polygonum sachalinense — Fallopia sachalinensis

Polygonum sagittatum — Persicaria sagittata

Polygonum scandens — Fallopia scandens

Polygonum virginianum — Persicaria virginiana

Polygonum viviparum — Bistorta vivipara

Polymnia uvedalia — Smallanthus uvedalia

Porteranthus stipulatus — Gillenia stipulata

Porteranthus trifoliatus — Gillenia trifoliata

Potamogeton capillaceus — Potamogeton bicupulatus

Potamogeton filiformis — Stuckenia filiformis

Potamogeton lateralis — delete

Potamogeton pectinatus — Stuckenia pectinata

Potamogeton vaginatus — delete (lump with Stuckenia filiformis)

Potamogeton vaginatus — Stuckenia filiformis

Potentilla arguta — Drymocallis arguta

Potentilla bipinnatifida — add

Potentilla canadensis — add (split from P. simplex)

Potentilla fruticosa — Dasiphora fruticosa

Potentilla intermedia — add (split from P. inclinata)

Potentilla palustris — Comarum palustre

Potentilla paradoxa — Potentilla supina

Potentilla pensylvanica — Potentilla litoralis

Potentilla tridentata — Sibbaldiopsis tridentata

Potentilla verna — add

Prenanthes crepidinea — add

Proboscidea louisiana — original spelling, not “louisianica”

Prosartes trachycarpa — add

Prunus alleghaniensis — Prunus umbellata

Prunus angustifolia — add

Prunus armeniaca — add

Prunus cerasifera — delete

Prunus hortulana — add

Pseudotsuga menziesii — add

Psilocarya scirpoides — Rhynchospora scirpoides

Psoralea psoralioides — Orbexilum pedunculatum

Puccinellia fernaldii — Torreyochloa fernaldii

Puccinellia pallida — Torreyochloa pallida

Pueraria montana — add

Pyrola rotundifolia — Pyrola americana

Pyrus calleryana — add

Pyrus cordata — add

Quercus coccinea — Quercus ellipsoidalis

Quercus prinus — Quercus montana

Quercus shumardii — add

Ranunculus cymbalaria  — Halerpestes cymbalaria

Ranunculus ficaria — Ficaria verna

Ranunculus lapponicus  — Coptidium  lapponicum

Ranunculus sardous — add

Ranunculus trichophyllus — add (split from R. longirostris)

Rhamnus frangula — Frangula alnus

Rheum rhaponticum — Rheum ×hybridum

Rhexia mariana — add

Rhinanthus minor — add

Rhodotypos scandens — add

Rhynchospora glomerata — Rhynchospora recognita

Rhynchospora nitens — add

Ribes missouriense — add

Rosa canina — add

Rosa eglanteria — Rosa rubiginosa

Rosa virginiana — add

Rubus bifrons — add

Rubus caesius — add

Rumex maritimus — Rumex fueginus

Rumex occidentalis — add

Ruppia maritima — Ruppia cirrhosa

Ruta graveolens — add

Sagittaria cristata — add (split from S. graminea)

Salicornia europaea — Salicornia rubra

Salix atrocinerea — add

Salix matsudana — add

Salsola collina — add

Salsola kali — Salsola tragus

Sanguisorba minor — Poterium sanguisorba

Sanicula gregaria — Sanicula odorata

Saxifraga pensylvanica — Micranthes pensylvanica

Saxifraga virginiensis — Micranthes virginiensis

Schedonorus giganteus — add

Schoenoplectus purshianus — add (split from Scirpus smithii)

Schrankia nuttallii — Mimosa quadrivalvis

Scilla forbesii — add

Scilla luciliae — add

Scilla siberica — add

Scirpus acutus — Schoenoplectus acutus

Scirpus americanus — Schoenoplectus pungens

Scirpus atrocinctus — add (split from S. cyperinus)

Scirpus cespitosus — Trichophorum cespitosum

Scirpus clintonii — Trichophorum clintonii

Scirpus fluviatilis — Bolboschoenus fluviatilis

Scirpus georgianus — add (split from S. atrovirens)

Scirpus hallii — Schoenoplectus hallii

Scirpus hattorianus — add (split from S. atrovirens)

Scirpus heterochaetus — Schoenoplectus heterochaetus

Scirpus hudsonianus — Trichophorum alpinum

Scirpus olneyi — Schoenoplectus americanus

Scirpus paludosus — Bolboschoenus maritimus

Scirpus pedicillatus — add (split from S. cyperinus)

Scirpus smithii — Schoenoplectus smithii

Scirpus subterminalis — Schoenoplectus subterminalis

Scirpus torreyi — Schoenoplectus torreyi

Scirpus validus — Schoenoplectus tabernaemontani

Scleria reticularis — add

Sclerochloa dura — add

Sedum spurium — Phedimus spurius

Sedum telephium — Hylotelephium telephium

Senecio aureus — Packera aurea

Senecio congestus — Tephroseris palustris

Senecio indecorus — Packera indecora

Senecio obovatus — Packera obovata

Senecio pauperculus — Packera paupercula

Senecio plattensis — delete (lump with Packera paupercula)

Setaria glauca — Setaria pumila

Shepherdia argentea — add

Silene armeria — Atocion armeria

Silene dioica — add

Silene nivea — add

Silene pratensis — Silene latifolia

Sisyrinchium campestre — add

Sisyrinchium farwellii — Sisyrinchium fuscatum

Sisyrinchium hastile — delete (lump with S. albidum)

Smilacina racemosa — Maianthemum racemosum

Smilacina stellata — Maianthemum stellatum

Smilacina trifolia — Maianthemum trifolium

Smilax tamnoides — Smilax hispida

Solidago vossii — add (split from S. houghtonii)

Sparganium chlorocarpum — Sparganium emersum

Sparganium minimum — Sparganium natans

Spartina gracilis — add

Spiranthes casei  — add (split from S. cernua)

Spiranthes magnicamporum — add (split from S. cernua)

Spiranthes ochroleuca — add (split from S. cernua)

Spiranthes ovalis — add

Spiranthes tuberosa — add

Spiranthes vernalis — delete

Sporobolus asper — Sporobolus compositus

Sporobolus clandestinus — add

Sporobolus indicus — add

Stachys arenicola — add (split from S. palustris)

Stachys aspera — add (split from S. tenuifolia)

Stachys byzantina — add

Stachys hispida — add (split from S. tenuifolia)

Stachys pilosa — add (split from S. palustris)

Stellaria calycantha — Stellaria borealis

Stellaria pallida — add

Stipa avenacea — Piptochaetium avenaceum

Stipa comata — Hesperostipa comata

Stipa spartea — Hesperostipa spartea

Streptopus roseus — Streptopus lanceolatus

Symphyotrichum drummondii — add

Symphyotrichum firmum — add (split from Aster puniceus)

Syringa ×henryi — add

Syringa reticulata — add

Tanacetum huronense — Tanacetum bipinnatum

Taraxacum palustre — add

Taxodium distichum — add

Taxus cuspidata — add

Teesdalia nudicaulis — add

Thalictrum pubescens — add

Thaspium barbinode — Thaspium chapmanii

Thymus pannonicus — Thymus albidus

Tofieldia glutinosa — Triantha glutinosa

Tomanthera auriculata — Agalinis auriculata

Toxicodendron rydbergii — add (split from T. radicans)

Trillium cuneatum — add (split from Trillium viride)

Trillium luteum — add (split from Trillium viride)

Trillium viride — delete (split into T. cuneatum & T. luteum)

Trisetum melicoides — Graphephorum melicoides

Ulmus glabra — add

Uniola latifolia — Chasmanthium latifolium

Verbena canadensis — Glandularia canadensis

Veronica hederifolia — add

Viburnum trilobum — add (split from V. opulus)

Vicia lathyroides — add

Vigna unguiculata — add

Vinca major — add

Viola conspersa — Viola labradorica

Viola novae-angliae — add

Viola primulifolia — add

Vulpia myuros — add

Waldsteinia fragarioides — Geum fragarioides

Wolffia brasiliensis — add

Wolffia punctata — Wolffia borealis

Yucca flaccida — add (split from Y. filamentosa)

Zigadenus glaucus — Anticlea elegans

Zizania palustris — add (split from Z. aquatica)