| 2842 | O MY GOODNESS | Zurbrigg 1970/73 | TB | 36 | E | Self | S:buff yellow with imbricata flush of violet, F:buff yellow with violet stripes, gold haft, B: yellow | 6.00 |
| 2684 | O'SO PRETTY | Kegerise 1992/93 | TB | 31 | EM | Bitone | S:lilac tinted white, fading white, F:tinted lilac, fading to white in center, edged deep lilac, B:white, tipped lilac; ruffled, sweet frag | 8.00 |
| 1976 | OCEAN SWELLS | Burch 1986 | TB | 34 | M | Self | Ruffled pale blue violet, B:orange fading to pale blue violet at tip | 7.00 |
| 2321 | OCHRACEA CAERULEA | Denis 1919 | TB | ML | Blend | S4L, Red and yellow blend | 5.00 | |
| 283 | OCTOBER BLAZE | McDade 1934/35 | TB | E,Re | R7M Medium red self | 4.00 | ||
| 1656 | ODORATISSIMA | Jacquin 1797 | TB | M | Self | 5.00 | ||
| 724 | ODYSSEY | Babson 1970 | TB | 38 | M | Plicata | S:white with 3/4" border of medium blue, F:white with 1/2" border of medium blue, B:pale yellow | 6.00 |
| 2066 | OF COURSE | Hager 1978 | IB | 25 | M | Self | Light apricot, B:deep orange | 6.00 |
| 1402 | OFF SHORE | Jones 1973 | TB | 35 | M | Bicolor | S:light blue, F:white, B:red | 6.00 |
| 1931 | OH BABE | Anderson 1984 | TB | 30 | M | Plicata | S:deep gold, F:white ground with broad band of dark red brown plicata markings, deep gold in center, light brown edge, B:deep yelow | 7.00 |
| 2939 | OKLAHOMA | Mit 1945/x | TB | L | S3M yellow blend; good fragrance | 4.00 | ||
| 553 | OKLAHOMA BANDIT | Nichols 1979 | IB | 22 | M-L | Self | S:bright tawny gold, claret base, F:same, washed claret, B:orange-bronze; ruffled | 4.00 |
| 2326 | OKTOBERFEST | Maryott 1985/87 | TB | 37 | M | Self | Heavily ruffled red-orange; B:orange | 8.00 |
| 573 | OLA KALA | Sass 1942/43 | TB | 38 | M | Self | Heavily ruffled dark yellow; very vigorous and prolific, Dykes Medal 1948 | 4.00 |
| 608 | OLD FLAME | Ghio 1973 | TB | 36 | ML | Self | Chalk white with thin yellow edge on all petals, B:red | 6.00 |
| 1454 | OLD MASTER | Ghio 1979 | TB | 36 | ML | Blend | S:mid-brown, F:red, brown and violet blend, B:tan | 6.00 |
| 2464 | OLIVE ORCHID | Austin 1956/57 | TB | 40 | L | Self | Pale lilac blue, deep lilac flush at end of B. olive veins on white ground at sides of bright yellow beard | 4.00 |
| 1484 | OLIVELLA | Bledsoe 1981 | TB | 32 | E | Self | Light violet with gold suffused border, olive underneath on F, gold hafts, B:gold | 7.00 |
| 1120 | OLYMPIAD | Ghio 1983 | TB | 38 | E-L | Bitone | S:pale blue, darker blue in center, F:light blue with mid-blue wash through center, B:light blue | 7.00 |
| 1468 | OLYMPIC CHALLENGE | Schreiner 1985/85 | TB | 38 | EM | Self | Lightly ruffled uniform rich orange, half dollar size white area surrounding rich tangerine red B; beautiful and very popular | 8.00 |
| 2413 | OLYMPIC PINK | Gibson 1984/85 | TB | 36 | ML | Self | Ruffled, fluted, and laced pink with blue cast, B:red | 8.00 |
| 378 | OLYMPIC TORCH | Schreiner 1956/58 | TB | 38 | L | Self | Ruffled light golden bronze | 4.00 |
| 2680 | OMINOUS STRANGER | Innerst 1992/93 | TB | S:muted yellow trimmed muted purple, brown dots, F:muted yellow trimmed muted purple, tiny brown dots over all, B:bronze; slight frag | 8.00 | |||
| 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 | 7.00 |
| 2080 | ON FIRE | McClintock 1979 | SDB | 12 | M | Self | Full orange-red, B:deep blue-violet | 4.00 |
| 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 | 7.00 |
| 870 | ON THE GO | Plough 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 | 4.00 |
| 2149 | ONE ACCORD | Ensminger 1981 | SDB | 14 | E | Bitone | S:cobalt blue, F:campanula violet, B:hyacinth blue | 4.00 |
| 238 | ONE DESIRE | Shoop 1960/60 | TB | 34 | EM | Self | Deep rich pink, B:pink | 6.00 |
| 1038 | OOS AND AHS | Ensminger 1973 | TB | 36 | M-L | Self | Pale blue, splashed dark violet, B:yellow; no two blossoms have the same color arrangement | 6.00 |
| 2679 | OPALINE | Williamson 1928/28 | TB | ML | S9L | 4.00 | ||
| 2681 | OPENING ACT | Lauer 1990/91 | TB | 35 | L | Self | Orchid self, B:orange; slight sweet fragrance | 8.00 |
| 1412 | OPENING NIGHT | Gibson 1969/x | TB | 42 | EM | Bitone | S:velvet black-purple, F:darker, B:lively purple; ruffled | 5.00 |
| 1932 | ORANGE BANNER | Waters 1953/55 | TB | 34 | ML | Self | Very deep rich Indian yellow flushed cadmium orange. Flowers perhaps a little large for height of stalk. | 4.00 |
| 419 | ORANGE CAPER | Warburton 1963/64 | SDB | 11 | E | Self | Vivid orange-yellow, B:bright orange | 4.00 |
| 631 | ORANGE CHIFFON | Smith 1968/69 | TB | 36 | M | Self | Soft orange, B:tangerine | 5.00 |
| 1073 | ORANGE CRUSH | Suiter 1957/59 | TB | 38 | ML | Self | (old #54) Burnt orange self. Large bloomed orange with serrrated edges, B:bushy red-orange; GBF | 4.00 |
| 460 | ORANGE EMPIRE | Hamner 1973/74 | TB | 37 | M-L | Self | Ruffled brilliant orange, B:saturn red | 6.00 |
| 1745 | ORANGE FLOUNCE | Austin 1963/64 | TB | 36 | M | Bitone | S:golden orange, F:orange flushed rose, B:2-inch orange flounces flushed rose | 5.00 |
| 1933 | ORANGE GEM | McKee 1948/48 | TB | 38 | M | Self | Rich dark yellow-orange | 4.00 |
| 309 | ORANGE GLORY | Jones 1973/74 | TB | 35 | M | Self | Ruffled and laced orange with buff influence, B:red-orange | 6.00 |
| 1701 | ORANGE HONEY | Zurbrigg 1976 | TB | 36 | M,Re | Self | Apricot with some blending of yellow at haft, B:red; Oct. rebloom | 6.00 |
| 2682 | ORANGE JEWELIUS | Miller 1990/91 | TB | 36 | ML | Bitone | S:creamy orange, F:orange blended yellow, slight pink tones, B:red | 8.00 |
| 2791 | ORANGE PARADE | Hamblen 1958/61 | TB | 38 | M-L | S:marigold orange, F:Spanish orange, B:orange red | 4.00 | |
| 2744 | ORANGE PLUME | Gibson 1978/79 | TB | 38 | M | Ruffled orange plicata with small white signal patch, B:orange | 6.00 | |
| 1074 | ORANGE PLUSH | Gibson 1973 | TB | 36 | M | Plicata | S:orange-buff, F:orange-buff with fine garnet and brown specks on haft, B:orange; ruffled and lightly laced | 6.00 |
| 2792 | ORANGE POPSICLE | Sutton 1987/87 | TB | 33 | E-M | Ruffled and laced creamy orange, B:tangerine,; pronounced sweet fragrance | 7.00 | |
| 804 | ORANGE PUNCH | Greenwood 1978 | TB | 28 | M | Blend | S:orange-buff-pink blend, F:orange, lighter in center, B:red; ruffled and laced | 6.00 |
| 2793 | ORANGE SLICES | Niswonger 1986/87 | TB | 33 | M | Pinkish orange, B:orange | 7.00 | |
| 2428 | ORANGE TWOTONE | Austin 1954/x | IB | 24 | E | Self | Yellow orange with dark wash of brown on F | 4.00 |
| 1878 | ORBIT RULER | Spence 1988 | TB | 33 | M | Self | Ruffled royal blue, B:light to mid-blue, tipped yellow, 1/2" upcurved hairless blue horns | 8.00 |
| 2096 | ORBITER | Aitken 1985/85 | TB | 38 | EM | Self | Blue-purple, B:frosted blue-purple, pronounced sweet fragrance | 7.00 |
| 944 | ORCHID BLUSH | Brown 1980/81 | TB | 35 | M | Self | Laced and lightly ruffled light orchid with slightly darker veining on F, B:orange, tipped orchid | 7.00 |
| 1429 | ORCHID CHIFFON | Plough 1981 | TB | 32 | M | Self | Very light orchid lavender, B:white, yellow in throat | 7.00 |
| 2835 | ORCHID DANDY | Tucker 1971/72 | TB | 35 | E-L | bitone | S:orchid, suffused yellow at base, F:light lavender, white center, gold shoulders, B:bright yellow; laced | 6.00 |
| 1934 | ORCHID LADY | Salbach 1942/x | TB | 36 | ML | Self | Stately ruffled orchid-pink and copper; flaring falls | 4.00 |
| 862 | ORCHIDARIUM | Gaulter 1980 | TB | 36 | M | Self | Fluted blue lavender with paler blue lavender center on F, B:white | 7.00 |
| 396 | OREGON SUNSHINE | National 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 | 4.00 | |
| 1935 | ORELIO | DeForest 1947/47 | TB | 36 | M | Self | Big flowers of bright brownish red; distinct hue and silken finish with broad petals | 4.00 |
| 1486 | ORIENTAL ETCHING | Rudolph 1979 | TB | 34 | M | Bicolor | S:lavender-pink, F:lower half tan, blending to yellow on top, white blaze, B:yellow; ruffled | 6.00 |
| 1127 | ORIENTAL IMAGERY | Black 1984 | TB | 33 | EM | Bicolor | S:flesh pink, orchid overtones deepening to top, F:pale lavender orchid, white area around B, 1/2" lav.edge, B:tangerine; ruffled, fragrant | 7.00 |
| 542 | ORINOCO FLOW | Bartlett 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, frag | 8.00 |
| 666 | ORITAM | Hoffmeister 1975 | TB | 36 | M | Bicolor | S:yellow-orange, F:red-brown, B:orange | 6.00 |
| 2446 | ORLOFF | Sass 1931/38 | TB | LM | S:heavily veined appears rich brown, F:cream stitched and dotted bronze. Yellow toned plicata, brilliant cinnamon purple plicata | 4.00 | ||
| 628 | OSAGE BUFF | Gibson 1972/73 | TB | 36 | M | Plicata | S:apricot with garnet red flush, F:apricot with garnet red stitching and specks, B:poppy red; ruffled | 6.00 |
| 2760 | OSAKA | Ghio 1991/93 | TB | 42 | EM | S:white, cream center, F:maroon red, slight violet blaze, B:yellow | 10.00 | |
| 2815 | OTHELLO | Lemon 1848 | BB | Dark blue bitone | 5.00 | |||
| 1371 | OUT YONDER | Wickersham 1969/69 | TB | 36 | M | Bitone | S:pale blue, F:solid indigo blue with slight violet cast, B:white, tipped pale yellow | 5.00 |
| 474 | OVATION | Tompkins 1969/69 | TB | 35 | ML | Self | Dark bright pink; very beautiful but can't get it to grow for me | 6.00 |
| 2114 | OVER HERE | White 1938/38 | MTB | M | Bitone? | 1/4 Onc, slightly fragrant | 4.00 |