What: Ring Mountain bioblitz
Where: Park and meet in the parking lot of the Marin Country Day School
When: 9:00 am on Saturday, April 15
The unique geology and microclimate of Ring Mountain provide a home for a number of rare plants. The soils on the ridge are heavily laced with the mineral serpentine. Soils derived from this mineral are toxic to most plants, but a number of species have evolved mechanisms to survive on serpentine. As a result, where serpentine soils are found, there are usually isolated populations of rare plants. The most extreme example of this phenomenon is the Tiburon Mariposa Lily, which is found on the upper slopes of Ring Mountain, and nowhere else on earth!