Several encino capulincillo (Quercus crassipes) grow in the Shields Oak Grove in the University of California, Davis Arboretum, and perform reasonably well in the deep soils of Davis. These trees were formerly marked as Quercus mexicana, a very close relative of Quercus crassipes. In this entry, both oak species are grouped together, due to their physical and ecological similarity, as well as our lack of experience with differences between the types in California. These are aesthetically interesting trees with very dark green foliage, and a "layered" canopy somewhat akin to Japanese maple. These encinos are likely to perform well on favorable sites throughout coastal California. These lovely Mexican oaks are highly recommended for further trial in the cities of coastal California, especially on sites with strong marine influence like San Francisco, Santa Cruz, and Santa Barbara.