Beautiful and thanks for the great photos. Now I'm wondering if it would be possible to create a little desert patch in my Bay Area garden for cedroensis and some of the other desert salvias.

Colbyolds, might as well give it a try. I think these cedroensis are probably coastal and they probably have alot of sun in their short list of requirements...but black rocks and some companion plantings could make it work in the Bay Area. I give mine a light summer sprinkle when I think about it, which isn't too often, to mock the monsoons that pass thru Baja that time of year. It makes them perk up from their deciduous state.

Very nice! Where does one actually find this salvia for sale? I've never seen it. Does it set seed?

Back in May of '07, someone picked up a cedrosensis at the UC Davis spring plant sale.
http://forums.gardenweb.com/forums/load/salvia/msg0521584114391.html
In that same thread, Richard lists a number of "cousins, S. chamaedryoides, S. lycioides, S. muelleri, S. coahuilensis, and S. chionophylla, all of which are on the Chihuahuan side of the Sierras."
With a little help from the 'Southern California Desert' experts at the Tilden's Botanical Garden, it just might be possible to build a home for these cousins. Sure looks like it's worth a try.

I've found them at Rancho Santa Ana Botanical Garden, Theodore Payne Foundation and Santa Barbara Botanical Garden. I have yet to find volunteers but that doesn't necessarily mean that the quail, snail and rodents don't get to them before I do. The Baja Blanca cultivar is more compact and erect whereas the species is more leggy and larger, in my half dozen or so experience. Reported to do well in containers, I've had no luck with that but my potting soil might not have been ideal.
Forrest Shreve and Ira Wiggins in their veg and flora of the sonoran desert, 1964, mention a whole list of salvias that are from this region, both north and south of the border. They actually report cedroensis around magdalena bay on the mainland so I'm wrong about island endemism. Does anybody know of species such as s galinsofolia, hyptoides, riparia, misella, setosa, subincisa, tiliifolia, seemannii...?? now that we're on the subject of cousins.
This may get more interesting...and/or these species may have all been reclassified.