Three Seeded Mercury

Achillea millefolium

        Yarrow

        Used as an "all-heal" medicinal herb,  this plant is circumpolar and was  familiar to early settlers. Colonizes roadside and field edges.

Aconitum uncinatum

        Monkshood

        Quite uncommon on the Eno and elsewhere in the central piedmont.  The basal rosettes show up in late winter but this shade-loving plant has flower stems that don't elongate and bloom until very late in the summer, barely before frost.

Actaea pachypoda

        Dolls Eye, Baneberry

Agalinis decemloba

        Tenlobe Gerardia

 A. purpurea

        Purple Gerardia

        A shrubby annual of the Figwort family that blooms in late summer and early fall.  Found in open habitat such as powerlines and unmowed roadsides.

A. tenuifolia

        Slenderleaf Gerardia

Agrimonia parviflora

        Harvestlice

A. pubescens

        Soft Agrimony

Agrostemma githago

        Corn-cockle

Aletris farinosa

        Stargrass, Colic-root

Alisma subcordatum

        Water Plantain

Allium canadense

        Meadow Garlic

A. vineale

        Wild Garlic

Amaranthus species

        Pigweed

Ambrosia artemisiifolia

        Annual Ragweed

A. trifida

        Giant Ragweed

Amianthium muscaetoxicum

        Fly-poison

        A lily found in dry open woods.  At one time, the bulbs were actually crushed and mixed with honey or syrup for fly poison.

Amphicarpa bracteata

        Hog Peanut

Amsonia tabernaemontana

        Blue Star

        An early blooming plant of  woods edges.  Closely related to Indian Hemp, both being from the Dogbane family.

Anagallis arvensis

        Scarlet Pimpernel

Aneilema keisak

        Wartremoving Herb

Anemone lancifolia

        Mountain Thimbleweed

        Locally rare, being more common in the mountains.

A. virginiana

        Thimbleweed

        The common name is derived from the appearance of the seed head.  There is one very rare look-alike in NC.

Angelica venenosa

        Hairy Angelica

Antennaria plantaginifolia

        Pussy-toes, Woman's Tobacco

A. solitaria

        Pussy-toes

Anthemis cotula

        Dog Fennel,

Apios americana

        Groundnut

Aplectrum hyemale

        Puttyroot, Adam-and-Eve

Apocynum cannabinum

        Indian Hemp

Aquilegia canadensis

        Columbine

        Along the Eno this plant can be found growing in the wild at Cox's Mountain.  Frequently a cultivated garden plant.

Arabis canadensis

        Sicklepod

A. laevigata

        Smooth Rockcress

Aralia nudicaulis

        Wild Sarsaparilla

Arctium minus

        Lesser Burdock

Arisaema dracontium

        Green Dragon

A. triphyllum

        Jack-in-the-pulpit

        Denizens of low, swampy woods and edges, flowering in early spring.The bright red berries are very spectacular in the fall.

Aristolochia serpentaria

        Birthwort

Arnica acaulis

        Leopard's-bane

        Early blooming (April) member of the  Composite family. Common name means killer of leopards!  Actually all parts of the plant are deemed poisonous to mammals.

Artemisia vulgaris

        Common Wormwood

Aruncus dioicus

        Goat's Beard

Asarum canadense

        Deciduous Ginger

Asclepias amplexicaulis

        Clasping Milkweed

A. incarnata

        Swamp Milkweed

A. syriaca

        Common Milkweed

A. tuberosa

        Butterfly-weed

        A low growing colorful milkweed that frequently shows up in dry fields and along roadbanks from June until August.

A. variegata

        White Milkweed

        Growing in open areas, this tall summer milkweed attracts numerous butterflies. The floss from the seedpods was collected for life jackets during World War II!

A. verticillata

        Horsetail or Whorled Milkweed

A. viridiflora

        Green Milkweed

Aster concolor

        Eastern Silver Aster

A. divaricatus

        Wood Aster

A. dumosus

        Rice button Aster

A. grandiflorus

        Large-Flowered Aster

A. patens

        Late Purple Aster

A. paternuus

        Toothed Whitetop Aster

A. pilosus

        Hairy White Oldfield Aster

A. solidagineus

        Narrowleaf Whitetopped Aster

A. vimineus

        Smooth White Oldfield Aster

Aureolaria flava

        Smooth False Foxglove

        Late blooming tall spikes of flowers - Plant is parasitic on the roots of oaks. Prefers dry, open, deciduous woods.

A. virginica

        Downy False Foxglove

Baptisia australis

        Blue Wild  Indigo

        A rare species of Baptisia  associated with the prairie remnant glades around Penny's Bend.

B. tinctoria

        Rattle-weed, Horsefly Weed

Barbarea vulgaris

        Winter Cress

Belamcanda chinensis

        Blackberry-lily

Bidens bipinnata

        Spanish Needles

B. aristosa

    Bur Marigold, Tick-Seed

        A profusely blooming annual of early fall that literally takes over newly mowed powerlines and roadside ditches.

Blephilia ciliata

        Wood-mint

Boehmeria cylindrica

        False Nettle

Boltonia caroliniana

        Doll's Daisy

Cacalia atriplicifolia

        Pale Indian-plantain

Calystegia sepium

        Hedge Bindweed

Capsella bursa-pastoris

        Shepherd's-purse

Cardamine angustata

        Toothwort

C. concatenata

        Toothwort

        Found in early spring in moist rich woods along streams and in lowlands. The Falcate Orange-tip butterfly shows up when this plant blooms.

C. diphylla

        Toothwort

C. pensylvanica

        Bitter Cress

Carduus altissimus

        Thistle

C. nutans

        Musk Thistle

C. pumilus

        Pasture or Bull Thistle

Cassia fasciculata

        Partridge Pea

        Blooms in late summer along weedy roadsides and edges of farm fields. A favorite of the Cloudless Sulfur butterfly.

C. hebecarpa

        Wild Senna

        Closely related to the Partridge Pea and found in the same habitats.
 

C. nictitans

        Wild Sensitive Plant

Castilleja coccinea

        Indian Paintbrush

Caulophyllum thalictroides

        Blue Cohosh

Centaurea cyanus

        Bachelor's Button, Cornflower

Centrosema virginianum

        Butterfly Pea

        A sprawling vine of midsummer found mostly in open woods and clearings such as roadsides.

Cerastium glomeratum

        Sticky Chickweed

C. holosteoides

        Mouse-ear Chickweed

Chaerophyllum tainturiera

        Wild Chervil

Chamaelirium luteum

        Blazing-star, Devil's bit, Fairy-wand

Chelone glabra

        White Turtle Head

        Found in late summer along stream banks, this plant blooms profusely  when located in a sunny opening. Look straight into the blossom and see the reason for its common name.

Chenopodium album

        Lamb's-quarters

Chimaphila maculata

        Pipsissewa, Spotted Wintergreen

        Common in mature pine woods. The fragrant blossoms appear in April and May but the variegated foliage is evergreen and evident the year around.

C. umbellata

        Pipsissewa, Prince's Pine

Chrysanthemum leucanthemum

        Ox-eye Daisy

        Can be found almost anywhere under the sun - literally - roadsides, pastures, yards, powerlines

C. parthenium

        Feverfew

Chrysogonum virginianum

        Green and Gold

        A low growing composite with a long bloom period.  Seems to bloom longer and more profusely in edge habitats with some sun.

Cichorium intybus

        Chicory

Cimicifuga racemosa

        Black Cohosh

        Found in coves and on rich slopes. Blooms in early summer. Used as a herbal estrogen substitute.

Cicuta maculata

        Spotted Water Hemlock

Circaea lutetiana

        Enchanter's Nightshade

Claytonia virginica

        Spring-beauty

        On a sunny day in early spring, the Eno lowlands are carpeted with this perennial.  The natives boiled the round irregular roots for a starchy food.
 

Clematis crispa

        Clematis, Leather-flower

C. ochroleuca

        Curly-heads

        The common name is derived from the plumose styles of the globular  seed heads.  This species of Clematis is considered rare and is  found on diabase soils in the Eno watershed.

C. viorna

        Vasevine

        A vine whose flowers have thick leathery sepals - hence the common name of Leather Flower - found along forest margins on basic soil.

C. virginiana

        Virgin's Bower

    

Clitoria mariana

        Butterfly Pea, Pigeon Wings

        This plant closely resembles the "other" Butterfly Pea - Centrosema virginianum.  A field guide will help differentiate them in the field.
 

Collinsonia canadensis

        Horsebalm, Richweed

Comandra umbellata

        Bastard-toadflax

Commelina communis

        Asiatic Dayfiower

C. diffusa

        Dayflower

C. erecta

        Whitemouth Dayflower

C. virginica

        Virginia Day flower

Conium maculatum

        Poison Hemlock

Conopholis americana

        Squaw-root, Cancer-root

Corallorhiza odontorhiza

        Autumn Coral-root

Coreopsis auriculata

        Lobed Tickseed

        A showy Coreopsis of late spring that needs open habitats along roads and fields. Easily and frequently cultivated.
 

C. major var. stellata

        Greater Tall Tickseed

        Flowers abundant in mid-summer and recognizable by the apparently 6-whorled stem leaves (which are really two sessile opposite leaves each deeply cut into three leaflets).

C. verticillata

        Goldern Tickseed, Garden Coreopsis

C. tripteris

        Tall Tickseed

C. verticitllata

        Whorled Coreopsis

        Recognizable by the thread-like leaves. This Coreopsis is a favorite nursery grown perennial.
 

Corydalis flavula

        Yellow Fumeworts

Crepis puIchra

        Hawk's-beard

Cryptotaenia canadensis

        Honewort

Cunila origanoides

        Dittany, Wild Oregano

Cuscuta gronovii

        Dodder, Love-vine

Cynoglossum virginianum

        Hound's Tongue, Wild Comfrey

Cypripedium acaule

        Pink Moccasin Flower, Pink Lady's Slipper

        A large spectacular orchid of pine flatwoods and acid soil. A reason for the scarcity of this orchid is that so many try to transplant it - Impossible!

C. calceolus var. pubescens

        Yellow Lady's Slipper

        A large circumboreal orchid which can be found in the moist woods along the Eno near the Pump Station.

Cytisus scoparium

        Scotch Broom

Datura stramonium

        Jimson Weed

Daucus carota

        Queen Anne's Lace

Delphinium ajacis

        Larkspur

Delphinium exaltata

        Tall Larkspur

Desmodium ciliare

        Hairy Tick Trefoil

D. lineatum

        Sand Tick Trefoil

D. nudiflorum

        Naked Flower Trefoil

D. paniculatum

        Penicle Tick Trefoil, Beggar Lice, Beggar's Ticks

D. rotundifolium

        Dollar Leaf

Dianthus armeria

        Deptford Pink

Dicentra cucullaria

        Dutchman's-breeches

        Flowers show up in early spring. This plant puts on an incredible show along Penny's Bend trail and at Willie Duke's Bluff.

Diodia teres

        Buttonweed, Poorjoe

D. virginiana

        Buttonweed

Dioscorea batatas

        Chinese Yam, Cinnamon Vine

D. villosa

        Wild Yam

Draba brachycarpa

        Shortpod Draba

D. verna

        Whitlow-grass

Dracocephatum virginianum

        False Dragonhead, Obedient Plant

Duchesnea indica

        Indian Strawberry, Snakeberry

Echinacea laevigata

        Smooth Purple Cone-flower

        The rarest plant in this list.  Occurs along the Eno and in nearby Granville County. Look for it in the meadow at Penny's Bend in July.

Eclipta alba

        Yerba-de-tago, False Daisy

Elephantopus carolinianus

        Carolina, Elephant's Foot

E. tomentosus

        Elephant's-foot, Devil's Grandmother

Epifagus virginiana

        Beech Drops

Epigaea repens

        Trailing Arbutus

        A low, trailing woody plant of the Heath family.  Can bloom as early as February. Prefers rocky, dry hillsides and bluffs. Requires getting down on your hands and knees to appreciate the fragrant flowers.
 

Erechtites hieracifolia

        Fireweed, Burnweed

Erigeron annuus

        Daisy Fleabane

E. canadensis

        Horseweed

E. pulchellus

        Robin's-plantain

E. strigosus

        Daisy Fleabane

Erodium cicutarium

        Heron's Bill

Eryngium yuccifolium

        Rattlesnake-master

Erythronium americanum

        Trout Lily, Dogtooth Violet

        An early blooming lily that covers many slopes along the river and its tributaries.  The mottled leaves can be identified as early as late February.

E. umbilicatum

        Dimpled Trout Lily

Eupatorium album

        White Thoroughwort

E. altissimum

          White Snakeroot

E. aromaticum

        Lesser Snakeroot

E. capillifolium

        Dog-fennel

E. coelestinum

        Blue Thoroughwort

E. fistulosum

        Joe-pye-weed

E. hyssopifolium

        Hyssop-leaved Thoroughwort

E. perfoliatum

        Common Boneset

E. purpureum

        Sweet Joe-pye-weed

E. rotundifolium

        Round-leaved Thoroughwort

E. rugosum

           White Snakeroot

E. serotinum

        Late-flowering Thoroughwort

E. sessilifolium

        Upland Boneset

Euphorbia corollata

        Flowering Spurge

        These tiny flowers are found throughout the summer along field edges and even in sunny spots in the woods.
 

E. supina

        Milk-purslane, Spotted Sandmat

Fagopyrum esculentum

        Buckwheat

Fragaria virginiana

        Wild Strawberry

Galax aphylla

        Galax, Beetleweed

        An evergreen ground cover more at home on our mountain slopes. The Eno's steep north facing  banks boast several colonies of this plant.

Galinsoga ciliata

        Gallant Soldier

Galium aparine

        Cleavers, Sticky Willy

G. circaezans

        Licorice Bedstraw

G. pilosum

        Hairy Bedstraw

G. tinctorium

        Stiff Marsh Bedstraw

Gaultheria procumbens

        Wintergreen

Gaura angustifolia

        Bee Blossom

Gentiana saponaria

        Harvest Bells, Soapwort Gentian

        Uncommon and frequently overlooked.  It blooms late in semi-shaded upland woods, bogs and ditches.

G. villosa

        Sampson's Snakeroot

Geranium carolinianum

        Carolina Geranium

G. maculatum

        Spotted Wild Geranium

        A spring blooming woodland flower. Usually prefers lowlands and ravines.  Foliage is distinctive and recognizable well into the summer.

G. molle

        Dovesfoot Geronium

Geum canadense

        White Avens

G. virginianum

        Cream Rough Avens

Gillenia stipulata

        Indian Physio

G. trifoliata

         Bowman's Root, Fawn's Breath

Glecoma hederacea

        Ground-ivy, Gill-over-the-ground

Gnaphalium obtusifolium

        Rabbit Tobacco, Everlasting, Cudweed

G. purpureum

        Cudweed

Goodyera pubescens

        Downy Rattlesnake Plantain

Gratiola virginiana

        Hedge Hyssop

Habenaria ciliaris

        Yellow Fringed-orchid

        Increasingly rare in the Eno valley and elsewhere. Prefers bogs, meadows and grassy hills. 

H. clavellata

        Small Green Wood-orchid

H. cristata

        Crested Yellow Orchid

H. flava

        Pale Green Orchid

H. orbiculata   

        Round-Leaved Orchid

H. peramoena

        Purple Fringeless-orchid

        This tall orchid found chiefly in Southwest North Carolina is rare in the piedmont where it is found  only in permanently moist woods near the Eno and Flat Rivers.

Haplopappus divaricatus

        Haplopappus

Helenium amarum

        Sneeze-weed

H. autumnale

        Common Sneeze-weed

        A shrubby fall blooming composite of open ditches and wet fields.

Helianthus angustifolius

        Swamp Sunflower

        A late blooming sunflower found in ditches and wet meadows.

H. annus

        Common Sunflower

H.. atrorubens

        Purple Disk Sunflower

H. decapetalus

        Thinleaf Sunflower

H. divaricatus

        Woodland Sunflower

H. giganteus

        Giant Sunflower

H. microcephalus

        Small Woodland Sunflower

H. strumosus

        Pale Sunflower Pale Sunflower

H. tuberosus

        Jerusalem Artichoke

Heliopsis helianthoides

        Smooth Ox-eye

Hemerocallis fulva

        Daylily

Hepatica americana

        Hepatica, Liverleaf

        An early bloomer named for leaf color and shape.  Start  looking on sunny south-facing slopes as early as February.

Heterotheca graminifolia

        Grass-leaved Golden Aster

H. mariana

        Maryland Golden Aster

H. subaxillaris

        Camphor Weed

Heuchera americana

        Alumroot

Hexastylis arifolia

        Wild Ginger, Arrowleaf Ginger

H. lewisii

        Lewis' Heartleaf

H. minor

        Little Heartleaf, Wild Ginger

H. virginica

        Virginia Heartleaf, Wild Ginger

Hibiscus moscheutos

        Rose Mallow

        A tall and showy flower of mid-summer that is found around pond edges and wet ditches.  Needs full sun.

H. trionum

        Flower-of-an-hour

Hieracium gronovii

        Queen Devil

H. pratense

        King Devil

H.. venosum

        Rattlesnake-weed

Holosteum umbellatus

        Jagged Chickweed

Houstonia caerulea

        Bluets

        Tiny masses of flowers are also known as Quaker Ladies.  These can show up almost anywhere by mid-March.
 

H. pusilla

        Star-violet

H. purpurea

        Summer Bluets, Large Houstonia

        This larger and taller version of Bluets is frequently found along trails, roadsides and powerlines.

H. tenuifolia

        Long Leaf Summer Bluet, Houstonia

Hybanthus concolor

        Green Violet

Hydrocotyle umbellata

        Marsh Pennywort

Hypericum denticulatum

        Coppery St. John's-wort

H. gentianoides

        Pineweed

H. hypericoides

        St. Andrew's Cross

H. mutilum

        Dwarf St. John's-wort

H. nudifiorum

        Early St. John's-wort

H. perforatum

        Common St. John's-wort

H. punctatum

        Spotted St. John's-wort

H. stragalum

        Low St. Andrews Cross

H. stans

        St. Peter's-wort

Hypochoeris radicata

        Cat's-ear

Hypoxis hirsuta

        Yellow Star-grass

Impatiens capensis

        Jewel-weed

        A shrubby summer blooming annual.  Its name derives from the bright turquoise visible after rubbing off the outer coating of the seed. Also called Touch-Me-Not because the ripe seed pod explodes when touched.

Ipomoea coccinea

        Red Star Morning-glory

I. hederacea

        Ivy-leaved Morning-glory

I. lacunosa

        White Star Morning-glory

I. pandurata

        Man-root

I. purpurea

        Tall Morning-glory

Iris cristata

        Dwarf Crested Iris

        A short-stemmed wild Iris that colonizes large areas along river and stream slopes. Blooms in March and April.

I. verna

        Dwarf Violet Iris

Isopyrum biternatum (Enemion biternatum)

        Isopyrum, False Rue-Anemone

        A rare member of the Buttercup family that can be found along the Eno at Willie Duke's Bluff.  Overlooked because if its resemblance to Windflower.

Isotria verticillata

        Large Whorled Pogonia

Justicia americana

        Water-willow

Krigia dandelion

        Potato Dwarf Dandelion

K. virginica

        Virginia Dwarf Dandelion

Kuhnia eupatorioides

        False Boneset

Lactuca canadensis

        Canada Lettuce

L. floridana

        Woodland Lettuce

L. graminifolia

        Grassleaf Lettuce

Lamium amplexicaule

        Henbit, Dead-Nettle

L. purpureum

        Purple Dead-nettle

Laportea canadensis

        Wood-nettle

Lechea racemulosa

        Pin-weed

L. tenuifolia

        Narrowleaf Pinweed

Lemna perpusilla

        Duck Weed

        Look closely at bright green ponds and backwaters.  You may be surprised to find thousands of these tiny plants covering the water surface.

Lepidium campestre

        Cow Cress, Peppergrass

Lespedeza cuneata

        Chinese Lespedeza

L. intermedia

        Lespedeza

L. procumbens

        Trailing Lespedeza

L. virginica

        Slender Lespedeza

Liatris graminifolia

        Dense Blazing Star, Liatris

        Late summer spikes of this plant add color and contrast to roadsides and powerlines when they are in bloom with several species of yellow composites.

L. scariosa

        Blazing Star, Devil's Bite

L. squarrosa

        Scaly Blazing Star, Liatris

L. squarrulosa

        Appalachian Blazing Star, Earl's Blazing Star

Ligusticum canadense

        Lovage

Lilium michauxii

        Michaux's or Carolina Lily

        Check out  bright spots of color in the woods in July and you just might find this uncommon Lily.
 

Linaria canadensis

        Toad-flax

Lindernia dubia

        Yellowseed False Pimpernel

Linum striatum

        Ridged Yellow Flax

L. virginianum

        Woodland Flax

Liparis lilifolia

        Twayblade

        This minature orchid has two shiny leaves that appear oily.  A close look is needed to appreciate the mauve orchid flowers on the spike.

Lithospermum arvense

        Gromwell Puccoon

 L. canescens

        Hoary Puccoon

         Another rare plant that  grows in the prairie remnant glades on circumneutral soil near the Eno. Blooms in late March to early April.

Lobelia cardinalis

        Cardinal Flower

        A lobelia of moist pastures, pond shores, muddy and marshy banks of tributaries in the woods.  A summer blooming plant.

L. glandulosa

        Glade Blue Lobelia

        An uncommon lobelia found in the low woods and marshy areas near the Eno River.

L. inflata

        Indian-tobacco

L. nuttallii

        Blue Lobelia

L. puberula

        Downy Blue Lobelia

L. spicata

        Pale Spike Blue Lobella

Ludwigia alternifolia

        Seedbox

L. decurrens

        Wingleaf Pinrose Willow

L palustris

        Marsh Seedbox

Lycopus rubellus

        Bugleweed

L. virginicus

        Water Horehound

Lysimachia ciliata

        Fringed Loosestrife

L. nummularia

        Moneywort, Creeping Jenny

L. quadrifolia

        Whorled Loosestrife

L. tonsa

        Southern Yellow Loosestrife

Malaxis unifolia

        Green Adder's Mouth

Marshallia obovata

        Barbara's Buttons

        A spring blooming composite of roadsides and open areas, frequently overlooked because other species are profusely blooming at the same time.

Matelea carolinensis

        Carolina Milkvine

M. decipiens

        Glade Milkvine

M. gonocarpa

        Angle-pod

Mecardonia acuminata

        Axilflower

Medeola virginiana

        Indian Cucumber-root

Medicago sativa

        Alfalfa

Melilotus albus

        White Sweet Clover

M. officinalis

        Yellow Sweet Clover

Melothria pendula

        Guadalupe cucumber

Menispermum canadense

        Moonseed

Mikania scandens

        Climbing Hempvine, Climbing Boneset

Mimulus alatus

        Sharp Wing Monkey-flower

M. ringens

        Allegheny Monkey-flower

Mitchella repens

        Partridge Berry

Mollugo verticilata

        Carpet-weed

Monarda fistulosa

        Wild Bergamot

Monotropa hypopithys

        Pine-sap

M. uniflora

        Indian Pipe

        This plant pops up overnight.  Pale and shiny and without chlorophyll, it also merits its name of Corpse Plant.
 

Monotropsis odorata

        Sweet Pine-sap

Muscari racemosa

        Grape Hyacinth

Mysotis scorpioides

        True Forget-me-not

M. verna

        Spring Forget-me-not

Myosurus minimus

        Mousetail

Nasturtium officinale

        Water Cress

Nemophila microcalyx

        Baby Blue-eyes

Nuphar luteum

        Spatter-dock, Yellow Pond-hly

Obolaria virginica

        Pennywort

Oenothera biennis

        Evening Primrose

O. fruticosa

        Narrow Leaf Evening Primrose, Sundrops

        A common and underappreciated summer wildflower of fields, pastures and roadsides.

O. laciniata

        Cutleaf Evening Primrose

O. speciosa

        Pink Ladies

Orchis spectabilis

        Showy Orchis

        Look for this unusual low growing orchid in low wet areas near streams in rich hardwood forests.

Ornithogalum umbellatum

        Star Of Bethlehem

Orobanche uniflora

        Broomrape, Cancer-root

Orontium aquaticum

        Golden Club

        A waxy-leaved aquatic whose common name literally describes the bloom spike. The starchy roots were used by the natives for food.

Osmorhiza longistylis

        Sweet Chervi, Licorice Rootl

Oxalis stricta

        Yellow Wood Sorrel

O. violacea

        Violet Wood Sorrel

Panax quinquefolium

        Ginseng, Sang

Paronychia fastigiata

        Hairy Forked Nail Wort

Parthenium integrifolium

        Wild Quinine

        Common name is derived from its use as a substitute for quinine in the treatment of urinary tract inflammations.

P. integrifolium auriculatum

        Glade Wild Quinine

Passiflora incarnata

        Maypops, Purple Passion-flower

P. lutea

        Maypops, Yellow Passion-flower

Pedicularis canadensis

        Wood-betony, Lousewort

Peltandra virginica

        Arrow Arum

Penstemon australis

        Beard-tongue

P. laevigatus

        Beard-tongue

Penthorum sedoides

        Ditch Stonecrop

Perilla frutescens

        Beefsteak-plant

Phlox carolina

        Thickleaf Phlox

P. glaberrima

        Smooth Phlox

P. maculata

        Wild Sweet William

P. nivalis

        Trailing Phlox

        This plant spreads horizontally along sunny roadbanks. Frequently cultivated as a ground cover.
 

P. ovata

        Wideflower Phlox

Phoradendron serotinum

        Mistletoe

Phryma leptostachya

        Lop-seed

Phyllanthus caroliniensis

        Leafflower

Physalis pubescens

        Ground Cherry

P. virginiana

        Ground Cherry

Phytolacca americana

        Pokeweed

Pilea pumila

        Clearweed

Plantago aristata

        Large-bract Plantain

P. lanceolata

        Narrow Leaf Plantain

P. major

        Common Plantain

Pluchea camphorata

        Camphor Weed

Podophyllum peltatum

        May-apple, Mandrake

        The bloom hides under umbrella-like leaves.  Berry is allegedly edible but all other parts of the plant are considered poisonous.

Polygala curtissii

        Curtiss' Milkwort

P. incarnata

        Pink Milkwort, Procession Flower

P. senega

        Seneca Snakeroot

P. verticillata

        Whorled Milkwort

Polygonatum biflorum

        Solomon's Seal

Polygonum aviculare

        Prostrate Knotweed

P. hydropiper

        Swamp Knotweed

P. pensylvanicum

        Common Knotweed

P. sagittatum

        Tearthumb

P. scandens

        Climbing False Buckwheat

Polymnia uvedalia

        Hairy Leafcup, Bear's Foot

Polypremum procumbens

        Polypremum

Portulaca oleracea

        Purslane, Little Hogweed

Potamogeton diversifolius

        Pondweed

Potentilla canadensis

        Dwarf Cinquefoil, Five-fingers

P. recta

        Sulfur Cinquefoil, Five-fingers

P. simplex

        Common Cinquefoil, Five-fingers

Prenanthes altissima

        Tall Rattlesnake Root

P. serpentaria

        Lion's Foot, Gall-of-the-earth

Prunella vulgaris

        Heal-all, Selfheal

Psoralea psoralioides

        Sampson Shakeroot

Ptilimnium capillaceum

        Mock Bishop's-weed

Pycnanthemum incanum

        Hoary Mountain-mint

P. tenuifolium

        Narrow-leaved Mountain-mint

Pyrola rotundifolia

        Shinleaf

Pyrrhopappus carolinianus

        Carolina Desert Chicort, False Dandelion

Ranunculus abortivus

        Littleleaf Buttercup

R. acris

        Tall Buttercup

R. bulbosus

        St. Anthony's Turnip

R. hispidus

        Bristly Buttercup

R. micranthus

        Rock Buttercup

R. parviflorus

        Smallflower Buttercup

R. pusillus