Plant Database (by name)

oppositeleaf spotflower - Acmella oppositifolia (Lam.) R.K. Jansen var. repens (Walt.) R.K. Jansen

oppositeleaved tarweed - Hemizonella minima (Gray) Gray

orange agoseris - Agoseris aurantiaca (Hook.) Greene

orange bush monkeyflower - Diplacus aurantiacus (W. Curtis) Jepson ssp. aurantiacus

orange coneflower - Rudbeckia fulgida Ait.

orange coneflower - Rudbeckia fulgida Ait. var. speciosa (Wenderoth) Perdue

orange coneflower - Rudbeckia fulgida Ait. var. umbrosa (C.L. Boynt. & Beadle) Cronq.

orange daylily - Hemerocallis fulva (L.) L.

orange eye butterflybush - Buddleja davidii Franch.

orange gooseberry - Ribes pinetorum Greene

orange hawkweed - Hieracium aurantiacum L.

orange honeysuckle - Lonicera ciliosa (Pursh) Poir. ex DC.

orange lichen - Caloplaca trachyphylla (Tuck.) Zahlbr.

orange milkwort - Polygala lutea L.

orange mullein - Verbascum phlomoides L.

orange wall lichen - Xanthoria polycarpa (Hoffm.) Rieber

orangeflower lupine - Lupinus citrinus Kellogg

orangefruit horse-gentian - Triosteum aurantiacum Bickn.

orangegrass - Hypericum gentianoides (L.) B.S.P.

orb dry rock moss - Grimmia orbicularis Bruch ex Wils.

orchardgrass - Dactylis L.

orchardgrass - Dactylis glomerata L.

orchid cactus - Epiphyllum ackermanii Haw.

orchid cactus - Epiphyllum macropterum (Lem.) Britton & Rose

Orcutt's bird's-beak - Cordylanthus orcuttianus Gray

Orcutt's brome - Bromus orcuttianus Vasey

Orcutt's foxtail cactus - Escobaria orcuttii Bödecker

Orcutt's threeawn - Aristida schiedeana Trin. & Rupr. var. orcuttiana (Vasey) Allred & Valdés-Reyna

oregano - Origanum vulgare L.

Oregon ash - Fraxinus latifolia Benth.

Oregon bentgrass - Agrostis oregonensis Vasey

Oregon boxleaf - Paxistima myrsinites (Pursh) Raf.

Oregon buttercup - Ranunculus oreogenes Greene

Oregon checkerbloom - Sidalcea oregana (Nutt. ex Torr. & Gray) Gray

Oregon cliff fern - Woodsia oregana D.C. Eat.

Oregon crabapple - Malus fusca (Raf.) Schneid.

Oregon fetid adderstongue - Scoliopus hallii S. Wats.

Oregon geranium - Geranium oreganum T.J. Howell

Oregon gumweed - Grindelia stricta DC. var. platyphylla (Greene) M.A. Lane

Oregon saxifrage - Saxifraga oregana T.J. Howell

Oregon semaphoregrass - Pleuropogon oregonus Chase

Oregon violet - Viola hallii Gray

Oregon white oak - Quercus garryana Dougl. ex Hook.

Oregon white oak - Quercus garryana Dougl. ex Hook. var. garryana

Organ Mountain larkspur - Delphinium wootonii Rydb.

organpipe cactus - Stenocereus thurberi (Engelm.) Buxbaum

oriental arborvitae - Platycladus orientalis (L.) Franco

oriental false hawksbeard - Youngia japonica (L.) DC.

oriental ladysthumb - Polygonum caespitosum Blume

Oriental mangrove - Bruguiera sexangula (Lour.) Poir.