OBERON (Van Tubergen, 1907). RC AIS Color Class: W2 (white, feathered blue) or S9L (light reddish bitone squalens). Classic example of an impossible-to-code-under-existing-rules aril. Deep amethyst standards, veined red-violet.  Nearly white falls heavily veined red-violet.  Unknown parentage, but clearly involving I. korolkowii.  

OH THOSE GENES (Hunt-McAllister, 1998) OGB Gene's favorite expression with respect to any cultivar with less-than-impressive flower but great breeding potential. An exceptionally "gardenable" plant. Soft ivory standards have some soft violet veining. Yellowish-ivory falls are veined and washed with soft red-violet and stippled around the beard. Jean Ralls X Mary of Magdala.

OLD FASHIONED GIRL OGB- White ground pseudo-plicata with light violet veining around edges of standards and burgundy veins edging the falls. Burgundy veins also flank the burgundy beard. Not tested for fertility. The name? As in flirtatious southern belle. (((Kalifa Baltis x Kalifa Gulnare) x Esther the Queen) x Tuesday Song) X Asha Michelle.

OLD TIMES SAKE (McAllister, 1998). OGB- Not pure nostalgia, it brings the best of the old – the wide form like that prized in the old Mohr-type oncobreds – into the modern age. Soft yellow standards have a few golden veins and their billowing form shows off golden yellow style arms. Soft yellow falls are blushed a pinkish rust. The bushy yellow-orange beard is framed by a small area of brownish burgundy. Brandy Sipper X Sunrise in Glory. 

ON BENDED KNEE (McAllister, 1998). That's how hybridizers will usually view it. (If you've ever ordered from the Gene Pool, check out its seedling number). Billowing pale blue-violet standards are lightly marked with fine, light blue-violet veins. Broad, buff falls have a contrasting burgundy-black beard. No signal, just a few deep burgundy lines that enhance the beard – like lush, brown eyelashes call attention to deep, brown eyes. This is the closest I've come to Gene Hunt's prized buff & blue arilbred that many visitors have seen in my garden – and it's on a strong, gardenable plant. 

ONCO G PLUS (Boswell, 1991). OB/OGB S garnet red; F blackish red; brown beard. C.G. White's "Onco G" X Arjuna Aga. (This was registered as an OB, but its pedigree is that of an OGB in the quantum system and probably in the chromosome-set system as well.) 

ONLOOKER (Hager, 1985). OGB S pale lilac; F greenish cream, large near black signal; dark beard. Here in southern New Mexico, both standards and falls quickly fade to near-white. and the signal is more aptly described as reddish-violet – but it's still stunning. ((Bethlehem Star x Welcome Reward) x Moon Star) X unknown. 

OPALS FOR ETHEL (McAllister, 1984) OB- Opalescent light blue self with blue beard that blends to yellow in the throat. Has no pollen. Sometimes pods to half-bred pollen, but none of its offspring have been worthy of introduction. Ethel was my elderly grand-aunt who kept urging me to introduce this particular seedling. I really wanted to name it for her, but I had no worthy seedling to name for my other grandaunt, Opal, so that would have been playing favorites. Fortunately, the flower is an unusual opalescent light blue self so "Opals" actually describes the color of the flower and the complete name served to honor both of my grandaunts. Patricia Craig X Capitola.

OPPOSITES ATTRACT (McAllister, 1995) OGB Pale blue standards, golden yellow falls. Sometimes smooth, sometimes splashed with violet and brown, but always striking. It has a strong, but essentially unexplored, potential for pink offspring. (Too many seeds given away!) A novelty that was introduced because of its popularity with garden visitors. Sometimes it's quite clear, sometimes splashed with violets and browns – two diametrically opposed images, yet always striking and attractive in either form. Welcome Reward X Esther, the Queen.

ORA J. SEALE (Hunt, 1983) OGB+/OGB Light pinkish yellow standards. Yellow falls washed peach with small signal of robin-red. Classified as an OGB+ in the old quantum system, it qualifies as an OGB today. Throws a wide range of colors and patterns in its offspring. Paired with Gethsemane, it gave me both Whirling Thunder and a seedling with the largest, most striking signal I've yet seen in a half-bred. Best of all, its seeds germinate more readily than those of most halfbreds. Recommended highly for beginners. Named for Gene's step-mother-in-law, without whom it would not have been possible to save his seedlings. Esther the Queen X Leo's Lort-Chen.

OUTLINE (Wilson, 1994). OGB S. orchid pink, slightly darker veining, orange rib; F. blended tannish rose-pink, large maroon-black signal outlined carmine; beards brown; slight fragrance. (Tuesday Song x Holden Ho5 arilbred) X Onlooker.