| 2842 | O MY GOODNESS | Zurbrigg, L. 1970/73 | TB | 36 | E | Self | RARE S:buff yellow with imbricata flush of violet, F:buff yellow, violet stripes, gold haft, B: yellow. 12 | 9.00 |
| 283 | OCTOBER BLAZE | McDade, C. 1934/35 | TB | E,Re | Bitone | RARE Bitone red violet, B:yellow. 5 | 9.00 | |
| 1656 | ODORATISSIMA | Jacquin, N. 1797/97 | TB | M | Self | S:lavender violet, F:slightly darker, lighter at haft, B:white, orange tipped at base; sweet fragrance, vigorous. 0 | NFS | |
| 553 | OKLAHOMA BANDIT | Nichols, H. 1979/80 | IB | 22 | M-L | Self | S:bright tawny gold, claret base, F:same, washed claret, B:orange-bronze; ruffled. 10 | 8.00 |
| 2326 | OKTOBERFEST | Maryott, W. 1985/87 | TB | 37 | M | Self | Heavily ruffled red-orange; B:orange. 2 | SOLD OUT |
| 573 | OLA KALA | Sass, J. 1942/43 | TB | 38 | M | Self | Lightly ruffled dark yellow; very vigorous and prolific, Dykes Medal 1948. Limit one. 32 | 15.00 |
| 3813 | OLD BLACK MAGIC | Schreiner 1996/96 | TB | 36 | EM | Self | Lightly ruffled coal black self, B:yellow gold; pronounced sweet fragrance. 5 | 10.00 |
| 608 | OLD FLAME | Ghio, J. 1973/75 | TB | 36 | ML | Self | RARE Chalk white with thin yellow edge on all petals, B:red. 7 | 9.00 |
| 2464 | OLIVE ORCHID | Austin, L. 1956/57 | TB | 40 | L | Self | RARE Pale lilac blue, deep lilac flush at end of B. olive veins on white ground at sides of bright yellow beard. 0 | SOLD OUT |
| 1120 | OLYMPIAD | Ghio, J. 1983/84 | TB | 38 | E-L | Bitone | S:pale blue, darker blue in center, F:light blue with mid-blue wash through center, B:light blue. 18 | 10.00 |
| 1468 | OLYMPIC CHALLENGE | Schreiner 1985/85 | TB | 38 | EM | Self | RARE Lightly ruffled uniform rich orange, half dollar size white area surrounding rich tangerine red B; beautiful and very popular. 6 | 11.00 |
| 2413 | OLYMPIC PINK | Gibson, J. 1984/85 | TB | 36 | ML | Self | Ruffled, fluted, and laced pink with blue cast, B:red. 4 | NFS |
| 378 | OLYMPIC TORCH | Schreiner 1956/58 | TB | 38 | L | Self | RARE Ruffled light golden bronze. 6 | NFS |
| 2680 | OMINOUS STRANGER | Innerst, S. 1992/93 | TB | 34 | M | Plicata | S:muted yellow trimmed muted purple, brown dots, F:muted yellow trimmed muted purple, tiny brown dots over all, B:bronze; slight frag, pbf. 5 | 9.00 |
| 260 | ON EDGE | Schreiner 1986/86 | TB | 37 | EM | Plicata | S:light lavender, stitched pale lavender-blue on inside, F:white, edged deep violet-purple; B:old gold. 18 | 9.00 |
| 1985 | ON LINE | Schreiner 1980/80 | TB | 36 | EM | Self | S:light blue with pronounced blue purple brushing along midrib to deep blue central streak on F, B:blue tinged gold. 10 | 10.00 |
| 870 | ON THE GO | Plough, G. 1973/74 | TB | 29 | E-L | Plicata | S:white, blending to hyacinth blue plicata pattern, F:white, heavily marked haft of brown heliotrope, edged part-way down F, B:orange. 10 | 8.00 |
| 2149 | ONE ACCORD | Ensminger, A. 1981/82 | SDB | 14 | E | Bitone | RARE S:cobalt blue, F:campanula violet, B:hyacinth blue. 20 | 6.00 |
| 238 | ONE DESIRE | Shoop, G. 1960/60 | TB | 34 | EM | Self | RARE Deep rich pink, B:pink. 0 | SOLD OUT |
| 4038 | ONE STEP BEYOND | Tasco, R. 2014/14 | TB | 34 | M | Bicolor | S:oxblood red, bronze lower midrib, F:velvety jet black, yellow veins at haft, B:golden orange, purple black hairs at end; ruffled, spicy fragrance, pbf. 8 | 15.00 |
| 1038 | OOS AND AHS | Ensminger, A. 1973/77 | TB | 36 | M-L | Self | VERY RARE Pale blue, splashed dark violet, B:yellow; no two blossoms have the same color arrangement. 0 | SOLD OUT |
| 2679 | OPALINE | Williamson, E. B. 1928/28 | TB | ML | Self | Orchid lavender with pink highlights, S:white at haft with lavender veins in center, light maroon veins at edges, B:white base, yellow tips. 7 | 9.00 | |
| 3052 | OPEN YOUR EYES | Black, P. 2010/10 | SDB | 15 | ML | Halo | S:white, pale blue irregular patches, F:white, large irregular inky dark blue spot, white darts in throat, B:white; strong sweet fragrance. 0 | NFS |
| 1412 | OPENING NIGHT | Gibson, J. 1969/70 | TB | 42 | EM | Bitone | RARE S:velvet black-purple, F:darker, B:lively purple; ruffled. 3 | NFS |
| 4547 | OPPOSITES | Trio, S. 2013/2013 | TB | 33 | M-L | Bicolor | S:white, gold edge, F:dark blue-purple, white blaze at haft inside blue band, brown veins at haft B:orange; ruffled. 14 | 15.00 |
| 3155 | ORANGE CHARIOT | Fay, O. 1962/64 | TB | 36 | M | Self | RARE Light orange self, pink blush, B:Chinese coral. 2 | 8.00 |
| 1073 | ORANGE CRUSH | Suiter, M. 1957/59 | TB | 38 | ML | Self | RARE Burnt orange self, large bloomed with serrrated edges, B:bushy red-orange; gbf. 2 | 8.00 |
| 460 | ORANGE EMPIRE | Hamner, B. 1973/74 | TB | 37 | M-L | Self | RARE Ruffled brilliant orange, B:saturn red. 0 | SOLD OUT |
| 1933 | ORANGE GEM | McKee,W. 1948/48 | TB | 38 | M | Self | RARE Rich dark yellow-orange. 12 | 8.00 |
| 309 | ORANGE GLORY | Jones, B. 1973/74 | TB | 35 | M | Self | VERY RARE Ruffled and laced orange with buff influence, B:red-orange. 16 | 9.00 |
| 2791 | ORANGE PARADE | Hamblen, M. 1958/61 | TB | 38 | M-L | Bitone | S:marigold orange, F:Spanish orange, B:orange red. 2 | NFS |
| 2744 | ORANGE PLUME | Gibson, J. 1978/79 | TB | 38 | M | Plicata | Ruffled orange plicata with small white signal patch, B:orange. 0 | NFS |
| 2428 | ORANGE TWOTONE | Austin, L. 1954/54 | IB | 24 | E | Self | RARE Yellow orange with dark wash of brown on F. 0 | NFS |
| 2096 | ORBITER | Aitken, T. 1985/85 | TB | 38 | EM | Self | Blue-purple, B:frosted blue-purple, pronounced sweet fragrance. 24 | 10.00 |
| 3857 | ORCHID AND FLAME | Craig, T. 1954/54 | TB | 45 | EE,Re | Self | VERY RARE Hyacinth orchid self, B:flaming tangerine. 4 | NFS |
| 944 | ORCHID BLUSH | Brown, J. 1980/81 | TB | 35 | M | Self | RARE Laced and lightly ruffled light orchid with slightly darker veining on F, B:orange, tipped orchid. 12 | NFS |
| 2835 | ORCHID DANDY | Tucker, J. 1971/72 | TB | 35 | E-L | bitone | RARE S:orchid, suffused yellow at base, F:light lavender, white center, gold shoulders, B:bright yellow; laced. 3 | 10.00 |
| 1934 | ORCHID LADY | Salbach, C. 1942/43 | TB | 36 | ML | Self | RARE Stately ruffled orchid-pink and copper; flaring falls. 9 | 8.00 |
| 396 | OREGON SUNSHINE | National Iris 1939/39 | TB | 31 | EM | Bitone | S:light lemon yellow, F:lemon yellow, tan lines at haft, faint lav. wash on F, B:bushy yellow orange. 16 | 8.00 |
| 1935 | ORELIO | DeForest, F. 1947/47 | TB | 36 | M | Self | Big flowers of bright brownish red; distinct hue and silken finish with broad petals. 20 | 7.00 |
| 2019 | ORIENTAL GLORY | Salbach, C. 1952/1952 | TB | 30 | M | Self | VERY RARE Red bitone of mahogany red and mahogany brown, violet-blue blaze, B:orange-yellow, pbf. 9 | 10.00 |
| 1127 | ORIENTAL IMAGERY | Black, P. 1984/85 | TB | 33 | EM | Bicolor | VERY RARE S:flesh pink, orchid overtones deepening to top, F:pale lavender orchid, white area around B, 1/2" lav.edge, B:tangerine; ruffled, fragrant. 8 | 10.00 |
| 542 | ORINOCO FLOW | Bartlett, C. 1989/93 | BB | 25 | EM-L | Plicata | S:white, heavily stitched deep purple blue on edge, F:white, heavy plicata markings at haft & top edge, B:navy blue; heavily ruffled, fragrant. 10. | 10.00 |
| 2446 | ORLOFF | Sass, H. 1931/37 | TB | 32 | LM | Plicata | RARE S:heavily veined appears rich brown, F:cream stitched and dotted bronze. Brilliant cinnamon purple plicata. 6 | 10.00 |
| 3377 | OTHER VOICES | Markham, L. 2004/2005 | TB | 34 | M | Bitone | S:greenish ivory, light gold edges, faint purple flush at base, F:warm cream, green shading to edge, bright gold hafts, B:deep gold; ruffled, spicy fragrance. 1 | NFS |
| 474 | OVATION | Tompkins, C. 1969/69 | TB | 35 | ML | Self | Dark bright pink; very beautiful but can't get it to grow for me. 4 | NFS |
| 4507 | OZARK JUBILEE | Nicodemus, R. 2011/2014 | TB | 28 | EM | Bicolor | S:light orchid-blue, faint gold at base, SA:orchid-blue, gold edge, F:Deep blue violet, lighter edge, darker shoulders, B:rusty orange; highly ruffled, lace. 20 | 15.00 |
