Encyclia radiatas smell like lemon honey
Most all encyclias have a frangrance whether it's in the morning or afternoon. Right now I have Encyclia alatas and they are fragrant in the afternoons.
Epic. Siam Jade... very strong sweet spicy scence... second bloom at my place and I have to admit I did not remember it to be that strong the first time (in October 2007)
What about the small oncidium plants known as Twinkles?
Oohhhhhh...htye are soooo fragrant and compact. Yet even in a three inch plastic pot they can have eight flower spikes. I have some in my shop right now with eight flower spikes!
Zygopetalums have a strong, sweet perfume, especially on a warm day. Or, if you want something different, there is always Liparis reflexa, that smells like a wet dog