PHOTOGRAPHS OF FLOWERING PLANTS OF THE OZARKS AND THE INTERIOR HIGHLANDS OF NORTH AMERICA

By

Paul L. Redfearn, Jr.  

Species in this list include not only native and adventive plants, but also some commonly encountered ornamental plants.  Plants are listed alphabetically by genus.  

A B C D E F G H I J K L M NP Q R S T U V W X Y Z

Oenothera biennis L, Photo 1, Photo 2, Photo 3, evening primrose [Onagraceae, evening primrose family]

Oenothera fructicosa L. ssp. fructicosa, sundrops, shrubby sundrops [Onagraceae, evening primrose family]

Oenothera macrocarpa Nutt. ssp. macrocarpa, Photo 1, Photo 2, Photo 3, fruit, Missouri primrose [Onagraceae, evening primrose family]

Oenothera speciosa Nutt., Photo 1, Photo 2, white evening primrose [Onagraceae, evening primrose family]

Opuntia humifusa (Raf.) Raf., eastern prickly pear [Cactaceae, cactus family]

Opuntia macrorhiza Engelm. var. macrorhiza, plains prickly pear [Cactaceae, cactus falimy]

Orbexilum pedunculatum (Miller) Rydb. var. pedunculatum, Sampson's snakeroot [Fabaceae, bean family]

Ornithogalum umbellatum L., star of Bethlehem [Liliaceae, lily family]

Orobanche uniflora Nutt., one-flowered cancer-root, small cancer root, [Orobanchaceae, broomgrape family]  

Osmorhiza claytonia, fruits [Apiaceae, carrot family]

Osmorhiza longistylis (Torrey) DC., anise root, sweet anise, smooth sweet cicely [Apiaceae, carrot family]

Ostrya virginiana (Miller) K. Koch, Photo 1, Photo 2, eastern hop hornbean [Betulaceae, birch family]

Oxalis florida Salisb.,  yellow wood sorel [Oxiladaceae, wood sorel family]

Oxalis stricta L., Photo 1, Photo 2,  yellow wood sorel, gray-green wood sorel [Oxiladaceae, wood sorel family]

Oxalis violacea L., Photo 1, Photo 2, violet wood sorel [Oxiladaceae, wood sorel family]

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