LEMON VERBENA (Aloysia triphylla) - put it near a path where it will brush against clothing for a green lemony smell that's not sweet.

Some of my favorites: daffodils, Salvia clevlandii, the fragrant camellias:  

Orchids (the best rainbow of fragrances anywhere). . .and at certain times,  Beareded Iris.

Certain mustards along a trail; or california bay's illusive light fragrance when in bloom along the San Gabriel mountains.  Then there's the varying fragrances of citrus.  My nose says Grapefruits have the perfect balance and orange flowers are sweet. 

The native wild Cucumber flowers at seeming certain times of the day are a surprise. 

Mix in various earth fragrances. 

And mints anyone or scented geraniums?

Confession down and out--well I do like that strange to my nose skunk cabbage.  But the nearby buttercups are sweet.   

And a short final of night blooming Jasmine--"el huele del Noche" ]The fragrance of he night].  I get a head ache and love it!

Wos, got my nose "a itchin" to go out and smell.

You just jogged my memory with the monkey flower.

There is a native I run across that always grows in the foothills --about 2 feet or less high.  It has what I call lemon/citronella fragrance  --very refreshing to smell when on a long hike or jog.  Fragrance increases during our summer conditions and the leaves develope a slight sticky "residue".

. . .And then there is the mild fragrance of he Mountain Lilacs up San Gabriel canyon.

Ahh the citrus. My Meyer's lemon seems to be in panic mode (it has these attacks now and again) and is covered with flowers that are wonderfully, potently fragrant. Other olfactory wonders.... (not citrus but an incredible simulation) Tagetes lemmonii and lemon-scented geranium. White sage, irises, and a fabulous low-growing, peppermint-scented geranium with huge fuzzy leaves that I am propagating from a cutting because I fell in love with it at the Zoo. I am partial to all scented geraniums, but the big velvety leaves on this one are also a tactile delight. Rosemary, mint, and I sneak snorts of a neighbor's Brugmansia (angel's trumpet). Also, though it hasn't bloomed in some time, my string of pearls (Senecio rowleyanus) once made amazing cinnamon-scented flowers...

Boronia megastimga
Michelia figo
Osmanthus fragrans, especially the aurantiacus form, smells like apricot jello

All are in bloom (and fragrance) right now! The wafting perfume of the boronia near my front door greeted me when I arrived home last night.