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The list below are plants that have all been found growing and thriving in the wild of the most coldest gardening regions. Many have hybrids that have been bred from them...these hybrids generally will be able to also grow in the same plant zones and survive the same long and bitter winters. Please do research them if you're unsure of their hardiness in your particular zone or region, and as always, with any seeds that you're unsure can be Winter Sown in your region save some seeds to start indoors.

Good luck to all!

Trudi

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Abronia fragrans -
sand verbena

Acer grandidentatum -
canyon maple

Acer negundo -
box elder

Acer pensylvanicum -
striped maple

Acer rubrum -
red maple

Acer saccharinum -
silver maple

Acer saccharun -
sugar maple

Aconitum columbianum -
Columbian monkshood

Aconitum delphiniiflium -
northern monkshood

Actaea pachypoda -
white baneberry

Actaea racemosa var. racemosa -
black cohosh

Actea rubra -
red baneberry

Ageratina altissima var. altissima -
white snakeroot

Aletris farinosa -
white colic root

Allium canadense -
meadow garlic

Allium cernuum -
nodding onion

Allium stellatum -
prairie onion

Allium tricoccum -
wild leek

Alnus serrulata -
brookside elder

Alnus viridis ssp. crispa -
green alder, Sitka alder

Amelanchier alnifolia -
Saskatoon serviceberry

Amelanchier canadensis -
Canadian serviceberry

Amelanchier laevis -
Allegheny service-berry

Amorpha fruticosa -
false indigo-bush

Anaphalis margaritacea -
pearly everlasting

Andromeda polifolia -
bog-rosemary

Andropogon gerardii -
big bluestem

Anemone canadensis -
Canadian anemone

Anemone cylindrica -
long-head thimbleweed

Anemone mutifida -
Pacific anemone

Anemone quinquefolia -
wood anemone

Anemone narcissiflora -
narcissus-flowered anemone

Anemone virginiana -
tall anemone

Antennaria ssp. -
pussytoes

Apocynum androsaemifolium -
spreading dogbane

Apocynum cannabinum -
Indian hemp

Aquilegia canadensis -
red columbine

Aquilegia formosa -
scarlet columbine

Aquilegia jonesii -
blue limestone columbine

Aralia nudicaulis -
wild sarsparilla

Aralia racemosa -
American spikenard

Arctostaphylos alpina -
black bearberry

Arctostaphylos patula -
green-leaf manzanita

Arctostaphylos uva-ursi -
red bearberry

Arisaema draconitum -
green dragon

Arisaema triphyllum -
jack-in-the-pulpit

Armeria maritima -
sea thrift

Arnica alpina -
alpine arnica

Arnica cordifolia -
heartleaf arnica

Arnica latifolia -
mountain arnica

Artemesia frigida -
prairie sagebrush

Aruncus dioicus var. vulgaris -
sylvan goatsbeard

Asarum canadense -
Canadian wild ginger

Asarum caudatum -
long-tail wild ginger

Asclepias incarnata -
swamp milkweed

Asclepias speciosa -
showy milkweed

Asclepias sullivantii -
prairie milkweed

Asclepias tuberosa -
butterfly milkweed

Asclepias verticillata -
whorled milkweed

Asimina triloba -
common pawpaw

Astragalus canadensis -
Canadian milk-vetch

Astriplex canascens -
four-wing saltbrush

Baptisia alba -
white wild indigo

Baptisia bracteata var. leucophaea -
plains wild indigo

Balsamorrhiza sagittata -
arrow-leaf balsamroot

Betula nigra -
river birch

Betula papyrifera -
paper birch

Betula populifolia -
gray birch

Blephilia ciliata -
downy pagoda-plant

Bouteloua curtipendula -
side-oats grama

Bouteloua gracillis -
blue grama

Bouteloua hirsuta -
hairy grama

Bromus kalmi -
prairie brome

Buchloe dactyloides -
buffalo grass

Calla palustris -
water arum

Calochortus macrocarpus -
sagebrush mariposa-lily

Calochortus nuttali -
mariposa-lily

Caltha leptosepula -
white marsh-marigold

Caltha palustris -
yellow marsh-marigold

Caltha palustris var. palustris -
marsh-marigold

Calylophus serrulatus -
yellow evening primrose

Camassia quamash -
common camas

Camassia scillioides -
Atlantic camas

Campanula rotundifolia -
bluebell-of-Scotland

Campanula scouleri -
pale bellflower

Campanulastrum americanum -
American bellflower

Cardamine concatenata -
cut-leaf toothwort

Cardamine diphylla -
two-leaved toothwort

Carex stipata -
stalk-grain sedge

Carpinus caroliniana -
American hornbeam

Carya alba -
mockernut hickory

Carya ovata -
shag-bark hickory

Castilleja applegatei ssp. martini -
desert paintbrush

Castilleja caudata -
pale Indian paintbrush

Castilleja coccinea -
scarlet Indian paintbrush

Castilleja linariifolia -
wyoming Indian paintbrush

Castilleja miniata -
great red Indian paintbrush

Castilleja parviflora -
mountain Indian paintbrush

Castilleja rhexiifloia -
rosy Indian paintbrush

Castilleja sessiliflora -
great plains Indian paintbrush

Caulophyllum thalictroides -
blue cohosh

Ceanothus americanus -
New Jersey tea

Ceanothus herbaceus -
prairie redroot

Ceanothus velutinus -
mountain balm

Celtis occidentalis -
common hackberry

Cephalanthus occidentalis -
common buttonbush

Cercis canadensis -
redbud

Cercocarpus montanus -
mountain mahogany

Chamaecrista fasciculata -
partridge pea

Chamaecrista nicitans -
sensitive pea

Chamerion angusitfolium ssp. angustifolium -
willow herb

Chamerion latifolium -
dwarf fireweed

Chelone glabra -
white turtlehead

Claytonia caroliniana -
Carolina springbeauty

Claytonia lanceolata -
lance-leaf springbeauty

Claytonia virginica -
springbeauty

Clematis columbiana -
purple virgin's bower

Clematis hirsutissima -
leather flower

Clematis occidentalis var. occidentalis -
purple clematis

Clematis virginiana -
virgin's bower

Cleome lutea -
yellow spider-flower

Cleome serrulata -
rocky mountain beeplant

Clethra alnifolia -
coastal sweet-pepperbush

Clintonia borealis -
yellow bluebead lily

Clintonia uniflora -
bride's bonnet

Collinsia canadensis -
citronella horsebalm

Collomia linearis -
narrow-leaf mountain trumpet

Commelina erecta -
white-mouth dayflower

Comptonia peregrina -
sweet fern

Coptis trifolia -
three-leaf goldthread

Coreopsis lanceolata -
lance-leaved coreopsis

Coreopsis palmata -
stiff coreopsis

Coreopsis tinctoria -
plains coreopsis

Cornus alternifolia -
alternate-leaf dogwood

Cornus canadensis -
Canadian bunchberry

Cornus florida -
flowering dogwood

Cornus racemosa -
gray dogwood

Cornus sericea -
red-twig dogwood

Corydalis sempervirens -
pale corydalis

Crataegus mollis -
downy hawthorn

Crataegus sericea -
hawthorn

Dalea candida var. candida -
white prarie-clover

Dalea purpurea var. purpurea -
purple prairie-clover

Dasiphora fruiticosa ssp. floribunda -
golden hardhack

Decodon verticillatus -
swamp loosestrife

Delphinium bicolo -
little larkspur

Delphinium carolianum ssp. virescens -
prairie larkspur

Delphinium glaucum -
tower larkspur

Delphinium nuttallianu -
two-lobe larkspur

Desmanthus illnoensis -
prairie bundle-flower

Desmodium canadense -
showy tick-trefoil

Desmodium illinoense -
Illinoise tick-trefoil

Dicentra canadensis -
squirrel corn

Dicentra cucullaria -
dutchman's-breeches

Dodecathon amethystinum -
amethyst shooting star

Dodecathon meadia -
shooting star

Dodecatheon jeffreyi -
Jeffrey's shootingstar

Doellingeria umbellata var. umbellata -
flat-top aster

Dryas drummondi i-
yellow mountain avens

Dryas octopetala -
white mountain avens

Dyssodia spp. -
dyssodia

Echinacea angustifolia -
narrow-leaved purple coneflower

Elaeagnus commutata -
wolf willow

Elymus canadensis -
Canadian wild rye

Empetrum nigrum -
black crowberry

Epigaea repens -
trailing arbutus

Ericameria nauseosa ssp. nauseosa var. nauseosa -
rabbitbrush

Erigeron compositus -
alpine daisy

Erigeron divergens -
spreading fleabane

Erigeron peregrinus -
coastal fleabane

Erigeron pulchellus -
robin's plantain

Erigeron speciosus -
aspen fleabane

Erigionum umbellatum -
sulfur-flowered wild buckwheat

Eriophyllum linatum -
Oregon sunshine

Eryngium yuccifolium -
button snakeroot

Erysimum capitatum -
prairie rocket

Erythronium albidum var. albidum -
white trout lily

Erythronium americanum -
American trout lily

Erythronium grandiflorum -
dogtooth violet

Eunonymus atropurpea -
burning bush

Eunonymus obovata -
running eunonymus

Eupatorium fistulosum -
joe-pye-weed

Eupatorium maculatum -
spotted joe-pye-weed

Eupatorium occidentale -
western joe-pye-weed

Eupatorium perfoliatum -
common joe-pye-weed

Eupatorium purpureum -
sweet scented joe-pye-weed

Euphorbia corollata -
flowering spurge

Euphorbia marginata -
snow-on-the-mountain

Eurybia macrophyllus -
large leaf wood-aster

Eurybia sibirica -
Siberian wood-aster

Euthamia graminifolia -
flat-top goldenrod

Filipendula rubra -
queen-of-the-prairie

Fragaria virginiana -
wild strawberry

Fragaria virginiana ssp. platypetal -
western alpine strawberry

Fraxinus americana -
white ash

Fraxinus pennsylvanica -
green ash

Fritillaria pudica -
yellow mission bells

Gaillardia aristata -
great blanket-flower

Galium boreale -
northern bedstraw

Galium triflorum -
fragrant bedstraw

Gaultheria procumbens -
eastern teaberry

Gaura coccinea -
scarlet gaura

Gaylussacia baccata -
black huckleberry

Gentiana andrewsii -
closed bottle gentian

Gentiana calycosa -
Rainier pleated gentian

Gentiana clausa -
bottle gentian

Gentiana crinita -
greater fringed gentian

Gentiana saponaria -
soapwort gentian

Gentianopsis crinita -
greater fringed-gentian

Geranium carolinianum -
Carolina cranesbill

Geranium erianthum -
northern cranesbill

Geranium maculatum -
spotted cranesbill

Geranium viscosissimum -
sticky purple cranesbill

Geum rivale -
water avens

Geum triflorum -
prairie smoke

Glycyrrhiza lepidota -
American licorice

Gymnocladus dioicus -
Kentucky coffee tree

Grayia spinosa -
spiny hop-sage

Gutierrezia sarothrae -
broom snakeweed

Hamamelis virginiana -
American witch hazel

Hedysarum alpinum -
alpine sweet-broom

Helenium autumnale -
fall sneezeweed

Helianthus annuus -
common sunflower

Helianthus giganteus -
giant sunflower

Helianthus maximilliani -
Maximillion sunflower

Helianthus paucilflorus ssp paucilflorus -
stiff sunflower

Helianthus petiolaris -
prairie sunflower

Helianthus strumosus -
woodland sunflower

Helianthus tuberosus -
Jerusalem artichoke

Heliomeris multiflora var. multiflora -
showy false goldeneye

Heliopsis helinathoides -
ox-eye sunflower

Hepatica nobilis var. acuta -
sharp-lobed hepatica

Hepatica nobilis var. obtusa -
round-lobed hepatica

Heterotheca villosa var. villosa -
golden-aster

Heuchera americana -
American alumroot

Heuchera parvifolia -
little-leaf alumroot

Holodiscus discolor -
mountain spray

Houstonia caserulea -
Quaker ladies

Hydrastis canadensis -
goldenseal

Hydrophyllum virginianum -
Virginia waterleaf

Hymenoxys hoopesii -
owl's-claws

Hypericum prolificum -
shrubby St. John's-wort

Hypoxis hirsuta -
eastern yellow star-grass

Ilex verticillata -
common winterberry

Illiamna rivularis -
streambank wild hollyhock

Ipomoea leptophylla -
bush morning-glory

Ipopmopsis aggregata ssp. aggregata -
scarlet gilia

Jeffersonia diphylla -
twinleaf

Juglans nigra -
black walnut

Kalmia angustifolia -
sheep laurel

Kalmia latifolia -
mountain laurel

Kalmia polifolia -
bog laurel

Koeleria macrantha -
prairie koeler's grass

Krascheninnikovia lanata -
winterfat

Ledum groenlandicum -
rusty Labrador tea

Leersia orysoides -
rice cut grass

Lepidium montanum -
mountain pepperwort

Lewisia reviviva -
oregon bitter-root

Liatris aspera -
tall gayfeather

Liatris punctata -
dotted gayfeather

Liatris pycnostachya -
prairie blazingstar

Liatris spicata -
dense gayfeather

Lillium canadense -
Canadian lily

Lillium columbianum -
wild tiger lily

Lillium michiganense -
Michigan lily

Lillium phildephicum -
wood lily

Lindera benzoi n-
northern spicebush

Linnaea borealis -
American twinflower

Linum lewisii var. lewissi -
blue flax

Linum rigidum -
large-flower yellow flax

Liriodendron tulipifera -
tulip-tree

Lithospermum canascens -
hoary puccoon

Lithospermum caroliniense -
hairy puccoon

Lithospermum incisum -
friged gromwell

Lobelia cardinalis -
Cardinal flower

Lobelia siphilitica -
great blue lobelia

Lobelia spicata -
pale-spike lobelia

Loiseleuria procumbens -
alpine azalea

Lonicera ciliosa -
orange honeysuckle

Lonicera involucrata -
bearberry honeysuckle

Lonicera sempervirens -
coral honeysuckle

Luetkea pectinata -
Alaska spirea

Lupinus caudatus -
Kellogg's spurred lupine

Lupinus nootkaensis -
Nootka lupine

Lupinus perennis -
wild lupine

Lupinus polyphyllus -
meadow lupine

Lysimachia ciliata -
fringed yellow-loosestrife

Lysimachia quadrifolia -
prairie loosestrife

Lysichiton americanus -
yellow skunk-cabbage

Macaerathera tanacetifolia -
tansy aster

Mahonia aquifolium -
holly-leaf oregon grape

Mahonia repens -
creeping Oregon grape

Maianthemum canadense -
Canadian mayflower

Maianthemum dilatatum -
two-leaf false Solomon's-seal

Maianthemum racemosum ssp. racemosum -
false Solomon's-seal

Maianthemum stellatum -
starry false Solomon's-seal

Malus ioensis -
prairie crabapple

Mentzelia laevicaulis -
giant blazingstart

Menyanthes trifoliata -
buck-bean

Mertensia ciliata -
mountain bluebells

Mertensia virginica -
Virginia bluebells

Mimulus guttatus -
golden monkey-flower

Mimulus lewisii -
great purple monkey-flower

Mimulus primuloides -
primrose monkey flower

Minuartia arctica -
arctic stitchwort

Minuartia obtusiloba -
alpine stitchwort

Mitchella repens -
partridge berry

Mitella diphylla -
two-leaf bishop's-cap

Monarda fistulosa -
Oswego tea

Monarda punctata ssp. punctata var. villicaulis -
horsemint

Morella pensylvanica -
northern bayberry

Myosotis asiatica -
Asian forget-me-not

Myrica gale -
sweetgale

Napaea dioica -
glade mallow

Nuphar lutea -
cow-lily

Nuphar lutea ssp. polysepala -
pond-lily

Nymphea odorata -
American white water-lily

Nyssa slyvatica -
black gum

Oenothera albicaulis -
pale evening primrose

Oenothera biennis -
common evening primrose

Oenothera caespitosa -
tufted evening primrose

Oenothera flava -
long-tube evening primrose

Oenothera nuttallii -
Nuttall's evening primrose

Oenothera rhombipetala -
diamond-petal evening primrose

Oligoneuron rigidum var. rigidum -
stiff goldenrod

Opuntia humifusa -
prickly pear

Opuntia polycantha -
plains prickly-pear

Ostrya viginiana -
eastern hop-hornbeam

Oxytropis campestris -
northern yellow locoweed

Packera aurea -
golden ragwort

Packera cana -
gray ragwort

Packera obovata -
round leaf groundsel

Packera paupercula -
northern ragwort

Packera plattensis -
prairie ragwort

Panicum virgatum -
wand panic grass

Parthenium integrifolium -
wild feverfew

Parthenocissus quinquefolia -
Virginia creeper

Pedicularis groenlandica -
bull elephant's-head

Pedicularis verticillata -
whorled lousewort

Penstemon albidus -
red-line penstemon

Penstemon angustifolius -
whorled penstemon

Penstemon deustus -
hot-rock penstemon

Pentsemon digitalis -
foxglove beardtongue

Penstemon fruticosa -
shrubby penstemon

Penstemon gracilis -
slender penstemon

Penstemon grandiflorus -
large-leaved penstemon

Penstemon hirsutus -
hairy beardtongue

Penstemon pallidus -
pale beardtongue

Petrophtyon caespitosum -
Rocky Mountain rockmat

Phacelia serica -
purplefringe

Philadelphus lewisii -
California mock orange

Phlox andicola -
plains phlox

Phlox diffusa -
spreading phlox

Phlox divaricata ssp. laphamii -
sweet william

Phlox glaberrima ssp. interior -
marsh phlox

Phlox longifolia -
long-leaved phlox

Phlox pilosa -
downy phlox

Phlox speciosa ssp. occidentalis -
showy phlox

Phragmites australis -
common reed

Phyllodoce empetriformis -
pink mountain-heath

Physocarpus opulifolius -
Atlantic ninebark

Physotegia virginiana -
obediant plant

Platanus occidentalis -
American sycamore

Podophyllum peltatum -
may apple

Polemonium occidentale -
western Jacob's ladder

Polemonium pulcherrimum -
alpine Jacob's ladder

Polemonium reptans -
Greek valerian

Polemonium viscosum -
sticky Jacob's ladder

Populus balsamifera -
balsam poplar

Populus deltoides -
eastern cottonwood

Populus tremuloides-
quaking aspen

Porteranthus trifoliatus -
bowman's root

Potentilla arguta -
prairie cinquefoil

Potentilla glandulosa -
sticky cinquefoil

Potentilla nivea -
snowy cinquefoil

Potentilla simplex -
common cinquefoil

Potentilla occidentalis -
western pasqueflower

Potentilla patens ssp. multifida -
pasqueflower

Prenanthes alba -
white rattlesnake-root

Prunus nigra -
Canadian plum

Prunus serotina -
black cherry

Prunus virginiana -
choke cherry

Pseudognaphalium obtusifolium ssp. obtusifolium -
blunt-leaf rabbit tobacco

Ptelea trifoiata -
common hoptree

Pulsatilla patens ssp. multifida -
pasqueflower

Pyrola asarifolia -
pink wintergreen

Pyrola elliptica -
shinleaf

Quercus alba -
northern white oak

Quercis coccinea -
scarlet oak

Quercus macrocarpa -
burr oak

Quercus michauxii -
swamp chestnut oak

Quercus muehlenbergii -
Chinkapin oak

Quercis palustris -
pin oak

Quercus rubra -
northern red oak

Ranunculus abortivus -
early wood buttercup

Ranunculus alismifolius -
meadow buttercup

Ranunculus cardiophyllus -
heart-leaf buttercup

Ranunculus fascicularis -
tufted buttercup

Ranunculus occidentalis -
western buttercup

Ratibida columnifera -
red-spike Mexican hat

Ratibida pinnat a-
grey-head Mexican hat

Rhexia virginica -
meadow beauty

Rhodiola integrifolia ssp integrifolia -
rosewort

Rhododendron canadense -
rhodora

Rhododendron maximum -
great laurel

Rhododendron periclymenoides -
pink azalea

Rhododendron prinophyllum -
early azalea

Rhododendron viscosum -
swamp azalea

Rhus aromatica -
fragrant sumac

Rhus copallinum -
winged sumac

Rhus glabra -
smooth sumac

Rhus typhina -
staghorn sumac

Ribes aureum -
golden currant

Ribes aureum var. villosum -
buffalo currant

Ribes laxiflorum -
trailing black currant

Rosa acicularis -
wild rose

Rosa arkansana var. suffulta -
praire rose

Rosa carolina -
Carolina rose

Rosa nutkana -
Nootka rose

Rosa palustris -
swamp rose

Rosa setigera var. tomentosa -
Illinois rose

Rosa woodsii -
Wood's rose

Rubus odoratus -
thimbleberry

Rubus parviflorus -
western thimble-berry

Rubus spectabillis -
salmon rasberry

Rudbeckia hirta -
black-eyed susan

Rudbeckia laciniata -
cut-leaf coneflower

Rudbeckia triloba -
brown-eyed susan

Ruellia humilis -
fringe-leaf wild petunia

Sabatia angularis -
rose-pink

Sagittaria latifolia -
arrowhead

Salix discolor -
pussy willow

Sambucus nigra ssp. caerula -
black elder

Sambucus nigra ssp. canadensis -
common elder

Sambucus racemosa var. racemose -
scarlet elder

Sambucus racemosa ssp. pubens var. arborescens -
coastal red elderberry

Sanguinaria canadensis -
bloodroot

Sassafras albidum -
sassafras

Saururus cernuus -
lizard's tail

Saxifraga bronchialis -
yellow-spot saxifrage

Saxifraga oppositifolia -
purple mountain saxifrage

Schizachyrium scoparium -
little false bluestem

Sedum ternatum -
woodland stonecrop

Senecio pseudoarnica -
seabeach senecio

Shepherdia argentea -
silver buffalo-berry

Shepherdia canadensis -
russet buffalo-berry

Silene acaulis -
moss campion

Silene douglasii -
seabluff catchfly

Silene stellata -
starry campion

Silphium integrifolium -
entire-leaf rosinweed

Silphium laciniatum -
compass plant

Silphium perfoliatum -
cup plant

Sisyrinchium albidum -
white blue-eyed grass

Sisyrinchium angustifolium -
narrow leaf blue-eyed-grass

Sisyrinchium campestre -
prairie blue-eyed grass

Sisyrinchium montanum -
strict blue-eyed grass

Solidago caesia -
wreath goldenrod

Solidago canadensis -
Canadian goldenrod

Solidago flexicaulis -
zigzag goldenrod

Solidago juncea -
plume goldenrod

Solidago missouriensis -
Missouri goldenrod

Solidago multiradiata -
Rocky Mountain goldenrod

Solidago nemoralis -
gray goldenrod

Solidago odora -
anise scented goldenrod

Solidago rugosa -
rough leaved goldenrod

Solidago sempervirens -
seaside goldenrod

Solidago speciosa -
showy goldenrod

Solidago ulmifolia -
elm-leaf goldenrod

Sorbus americana -
American mountain ash

Sorbus scopulina -
Cascade mountain ash

Sorghastrum nutans -
yellow Indian grass

Spartina pectinata -
prairie cord grass

Sphaeralcea coccinea -
scarlet globe-mallow

Spirea alba -
white meadowsweet

Spirea alba var. latifolia -
meadowsweet

Spirea douglass -
western spirea

Spirea splendens var. splendens -
subalpine spirea

Spirea stevenii -
Alaska spirea

Spirea tomentosa -
steeplebush

Sporobolus heterolepis -
prairie dropseed

Stanleya pinnata -
golden prince's-plume

Streptopus lanceolatus var. roseus -
rosy twistedstalk

Stylophorum diphyllum -
celandine poppy

Symphoricarpos orbiculatus -
coral berry

Symphyotrichum ascendens -
Pacific aster

Symphyotrichum drummondii var. drummondii -
arrow aster

Symphyotrichum divaricatum -
white wood aster

Symphyotrichum ericoides var. ericoides -
heath aster

Symphyotrichum foliaceum var. foliceum -
leafy aster

Symphyotrichum laeve var. laeve -
smooth aster

Symphyotrichum novae-angliae -
New England American aster

Symphyotrichum oblongifolium -
aromatic American aster

Symphyotrichum oolentagiense -
sky-blue American aster

Symphyotrichum pilosum var. pilosum -
frost aster

Symphyotrichum puniceum var. puniceum -
swamp aster

Symphyotricum sericeum -
western silver American aster

Symplocarpus foetidus -
skunk cabbage

Tellima grandiflora -
fragrant fringecup

Tephrosia virginiana -
goat's rue

Tetraneuris acaulis var. acaulis -
butte marigold

Tetraneuris grandiflora -
alpine sunflower

Thalictrum dascycarpum -
purple meadow rue

Thalictrum dioicum -
early meadow rue

Thalictrum pubescens -
king-of-the-meadow

Thalictrum thalictroides -
rue anemone

Thermopsis montana -
golden pea

Tiarella cordifolia -
heart-leaf foam flower

Tiarella trifoliata var. unifoliata -
western foamflower

Tilia americana -
American linden

Townsendia exscapa -
Easter daisy

Tradescantia bracteata -
long-bract spiderwort

Tradescantia occidentalis -
prairie spiderwort

Tradescantia ohiensis -
Ohio spiderwort

Tradescantia virginiana -
Virginia spiderwort

Tridens flavus -
tall redtop

Trientalis borealis ssp. borealis -
starflower

Trillium cernuum -
nodding trillium

Trillium erectum -
purple trillium

Trillium grandiflorum -
large flowered trillium

Trillium ovatum -
western wakerobin

Trillium undulatum -
painted wakerobin

Trollius laxus -
American globeflower

Typha latifolia -
broad-leaf cattail

Ulmus americana -
American elm

Uvularia grandiflora -
large flowered bellwort

Uvularia sessilifolia -
merrybells

Vaccinium angustifolium -
late lowbush blueberry

Vaccinium caespitosum -
dwarf blueberry

Vaccinium corymbosum -
highbush blueberry

Vaccinium ulignosum -
alpine blueberry

Vaccinum vitis-idaea -
lingonberry

Valeriana sitchensis -
Sitka valerian

Verastrum californicum -
California false hellebore

Verbena hastata -
blue verbena

Verbena stricta -
hoary verbena

Veronicastrum virginicum -
culver's root

Viburnum acerifolium -
maple-leaf arrow-wood

Viburnum edule -
moosewood viburnum

Viburnum lantanoides -
hobblebush

Viburnum prunifolium -
smooth blackhaw

Viola affinis -
sand violet

Viola canadensis -
Canadian white violet

Viola glabella -
smooth yellow violet

Viola labradorica -
American dog violet

Viola langsdorfii -
Alaska violet

Viola missouriensis -
Missouri violet

Viola palmata -
early blue violet

Viola pedata -
bird-foot violet

Viola pedatifida -
prairie violet

Viola pubescens -
downy yellow violet

Viola rostrata -
long-spur violet

Wyethia amplexicaulis -
northern mule-ears

Xerophyllim tenax -
western turkeybeard

Xyris ssp. -
yellow-eyed grass

Yucca glauca -
soapweed glauca

Zizia aurea -
golden alexanders