Names O | The Dawes Arboretum

Oenothera 'Innoeno131' Lemon Drop® • Onagraceae • Lemon Drop® evening-primrose‎

Oenothera lindheimeri 'So White' • Onagraceae • So White Lindheimer's beeblossom, So White white gaura‎

Oligoneuron ohioensis (syn.)‎ • Asteraceae • Ohio goldenrod‎

Ophiopogon japonicus 'Nanus' • Liliaceae • dwarf mondo-grass, dwarf lilyturf‎

Ophiopogon planiscapus 'Nigrescens' • Liliaceae • black mondo-grass‎

Opulaster intermedius (syn.)‎ • Rosaceae • Illinois common ninebark‎

Opuntia cespitosa • Cactaceae • eastern common prickly-pear, red-flowered prickly-pear‎

Opuntia humifusa • Cactaceae • common prickly-pear, devil's-tongue‎

Origanum × majoricum • Lamiaceae • Italian oregano, hardy sweet marjoram‎

Origanum 'Drops of Jupiter' • Lamiaceae • Drops of Jupiter ornamental oregano‎

Origanum heracleoticum (syn.)‎ • Lamiaceae • Greek oregano‎

Origanum hirtum (syn.)‎ • Lamiaceae • Greek oregano‎

Origanum vulgare subsp. hirtum • Lamiaceae • Greek oregano‎

Orixa japonica • Rutaceae • Japanese orixa‎

Osmanthus heterophyllus 'Goshiki' • Oleaceae • Goshiki hollyleaf osmanthus, Goshiki false holly, Goshiki holly-olive‎

Osmorhiza longistylis • Apiaceae • smooth sweet-cicely, anise-root‎

Osmunda cinnamomea (syn.)‎ • Osmundaceae • cinnamon fern‎

Osmunda regalis var. spectabilis • Osmundaceae • American royal fern‎

Osmunda spectabilis (syn.)‎ • Osmundaceae • American royal fern‎

Osmundastrum cinnamomeum • Osmundaceae • cinnamon fern‎

Ostrya carpinifolia • Betulaceae • European hop-hornbeam‎

Ostrya virginiana • Betulaceae • American hop-hornbeam‎

Ostrya virginiana 'JFS-KW5' Autumn Treasure® • Betulaceae • Autumn Treasure® American hop-hornbeam‎

Oxalis violacea • Oxalidaceae • violet wood-sorrel‎

Oxydendrum arboreum • Ericaceae • sourwood‎

Oyama sieboldii (syn.)‎ • Magnoliaceae • Oyama magnolia‎

The Dawes Arboretum