COMMON NAMES: O - P
[A B C D E F G H I J K L M N O P Q R S T U V W X Y Z]
obedient
plant - Physostegia virginiana (L.) Bentham
oblong-leaved
aster - Aster oblongifolius Nutt.
Ohio
buckeye - Aesculus glabra Willd.
Ohio
horse mint - Blephilia ciliata (L.) Bentham
old-field balsam - Gnaphalium obtiusifollium L. var. obtusifollium
old-field cinquefoil - Potettilla simplex Michaux
old-field goldenrod - Solidago nemoralis Drylander
old-field toadflax - Nuttalanthus canadensis (L.) D. Sutton
old man's beard - Chionanthus virginicus L.
Olney three-square – Schoenoplectus americanus Pers.
one-flowered cancer-root - Orobanche uniflora Nutt.
orange
coneflower - Rudbeckia fulgida Aiton.
orange day lily - Hemerocallis fulva (L.) L.
orange puccoon - Lithospermum canescens (Michaux) Lehm., L. incisum Lehm.
Osage
orange - Maclura pomifera (Raf.) C. Schneider
overcup oak - Quercus lyrata Walter
ox-eye
- Heliopsis helianthoides var. scabra (Dunal) Fern.
ox-eye
daisy - Leucanthemum vulgare Lam.
Ozark
chestnut - Castanea pumila var. ozarkensis (Ashe) G. Tucker
Ozark
chinquapin - Castanea pumila var. ozarkensis (Ashe) G. Tucker
Ozark
milk vetch - Astragalus distortus Torrey & A. Gray
[A B C D E F G H I J K L M N O P Q R S T U V W X Y Z]
Ozark
wake robin - Trillium pusillum var. ozarkanum (E. J. Palmer & Steyerm.)
Ozark
witch hazel - Hamamelis vernalis Sarg.
pagoda
tree - Sophora japonica
painted
cup - Castilleja coccinea (L.) Sprengel
pale
beard-tongue - Penstemon pallidus Small
pale
corydalis - Corydalis flavula (Raf.) DC.
pale
dock - Rumex altissimus Alph. Wood
pale
gentian - Gentiana flavida A. Gray
pale gerardia - Agalinis skinneriana (A. W. Wood) Britton
pale
purple coneflower - Echinacea pallida (Nutt.) Nutt.
pale
seeded plantain - Plantago virginica L.
pale
touch-me-not - Impatiens pallida
Nutt.
pale
violet - Viola striata Aiton
pale
spike
lobelia - Lobelia spicata Lam.
pale touch-me-not - Impatiens pallida Nutt.
palm sedge – Carex muskingumensis Schwein. Schwein.
panic
grass - Panicum boscii Poiret
panicle hydrangea - Hydrangea paniculata
pansy
violet - Viola pedata L.
paperbark maple - Acer griseum (Franch.) Pax
Paraguayan
purslane - Portulaca amilus Sprreng.
parsnip
- Pastinaca sativa L.
partridge
berry - Mitchella repens L.
[A B C D E F G H I J K L M N O P Q R S T U V W X Y Z]
partridge
pea - Chamaecrista fasciculata (Michaux) E. Greene
passion
flower - Passiflora lutea var. glabriflora Fern.
passion
vine - Passiflora incarnata L.
passion
vine - Passiflora lutea var. glabriflora Fern.
pawpaw
- Asimina triloba (L.) Dunal
peach-leaved dock - Rumex altissimus Alph. Wood
pear
- Pyrus communis L.
pedunculate oak - Quercus robus
Pennsylvania
smart weed - Polygonum pensylvanicum L.
pennyroyal - Hedeoma pulgeioides (L.) Pers.
peppermint - Mentha x piperita L.
perennial
pea - Lathyrus latifolius L.
perennial
phlox - Phlox paniculata L.
periwinkle - Vinca minor L.
persimmon
- Diospyros virginiana L.
phacelia
- Phacelia hirsuta Nutt.
pickerel
weed - Pontederia cordata L.
pignut
hickory - Carya texana Buckley
pin
clover - Erodium cicutarium (L.) L'Her. ex Aiton
pin oak - Quercus palustris Muenchh.
pinesap
- Monotropa hypopitys L.
pink
flowered dogbane - Apocynum androsaemifolium L.
pinkroot
- Spigelia marylandica L.
pinkweed
- Polygonum pensylvanicum L.
plainleaf
pussy toes - Antennaria plantaginifolia (L.) Hook.
[A B C D E F G H I J K L M N O P Q R S T U V W X Y Z]
plains
violet - Viola viarum Pollard
plains
wild indigo - Baptisia bracteata var. glabrescens (Larisey) Isely
pleurisy
root - Asclepias tuberosa ssp. interior Woodson
plume grass - Erianthus ravennae (L.) P. Beauv.
poison
hemlock - Conium maculatum L.
poison
ivy - Toxicodendron radicans (L.) Kuntze
poke
- Phytolacca americana L.
pokeweed
- Phytolacca americana L.
possum haw - Ilex decidua Walter
possum
wood - Diospyros virginiana L.
post
oak - Quercus stellata Wangenh.
prairie
anemone - Anemone caroliniana Walter
prairie
blue-eyed grass - Sisyrinchium campestre E. Bickn.
prairie bulrush - Bolboschoenus maritimus ssp. paludosus (A. Nelson) T. Koryana
prairie
buttercup - Ranunculus fascicularis Muhlenb. ex Bigelow
prairie
coneflower - Ratibida columnifera (Nutt.) Wooton & Standley
prairie coneflower - Ratibida pinnata (Ventenat) Barnhart
prairie
dock - Silphium terebinthanaceum Jacr.
prairie
dogbane - Apocynum cannabinum L.
prairie goldenrod, Solidago speciosa Nutt.
prairie milkweed - Asclepias hirtella (Pennell) Woodson
prairie mimosa - Desmanthus illinoensis (Michaux) MacMillan ex Robinson & Fern.
prairie
paintbrush - Castilleja coccinea (L.) Sprengel
[A B C D E F G H I J K L M N O P Q R S T U V W X Y Z]
prairie
parsley - Polytaenia nuttallii DC.
prairie
phlox - Phlox pilosa L.
prairie
rooster bill - Dodecatheon meadia L.
prairie
rose - Rosa setigera Michx. var. setigera
prairie
willow - Salix humilis Marsh
prairie tea - Croton monanthogynus Michx.
prickly lettuce - Lactuca serriola L.
prickly sida - Sida spinosa L.
pride-of-India - Koelreutera paniculata,
pride-of-India -Melia azedarach L.
prinrose willow - Ludwigia peploides (Humb., Bompl. & Kunth) Raven
puccoon - Lithospermum canescens (Michaux) Lehm., L. incisum Lehm.
purple
coneflower - Echinacea purpurea (L.) Moenk.
purple
headed sneezeweed - Helenium flexuosum Raf.
purple
loosestrife - Lythrum salicaria L.
purple meadow rue - Thlactrum dasycarpum Fischer & Avé-Lall.
purple
milkweed - Asclepias purpurascens L.
Purple poppy mallow - Callirhoe involucrata (Torrey & A. Gray) A. Gray
purple
prairie clover - Dalea purpurea Vent.
prairie rose gentian - Sabatia campestris Nutt.
purple
trillium - Trillium recurvatum Beck
purple
wake robin - Trillium recurvatum Beck
pussy
toes - Antennaria plantaginifolia (L.) Hook.
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