Kruckeberg estimates that serpentine regions of California represent only about 1% of the land surface but have about 10% of the endemic species.
For those of you that have soil with serpentine in it you have probably noticed that some plants hate you. The plants fail to thrive. They rot off at the base. They are variegated when they are supposed to be green.
Serpentine soils are usually not pure blue serpentine. They are usually adobe like with serpentine rocks here and there. Sometimes that look like red rock with some blue in it. Jade is a form of serpentine.One of the few ways that you can keep nasty weeds out of serpentine areas is to limit the fertility.So if you have a hillside of serpentine, plant serpentine tolerant plants and do not amend the soil, nor fertilize. (Huenneke, Laura Foster, et. al, 1990)