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Coulter pine is most frequent on steep south-facing slopes and ridges. [13] [14] [15] Soils may be poor to fertile, and are typically dry. Coulter pine is an indicator of serpentine soils, but also occurs on a variety of other substrates. Soils range from loamy to gravelly or rocky in texture.
The gray pine (Pinus sabiniana) and rarer Coulter pine (Pinus coulteri) can be found at all elevations, especially between 800–3,000 feet (240–910 m). Coulter pine reaches its northern limit on northern of Mt. Diablo.
Overstory species include coulter pine, monterey pine, bishop pine, shore pine, and several endemic cypresses, species which generally rely on fire to open their cones and release seeds. Closed-cone forests often grow in low nutrient and/or stressed soils, which can lead to slow growth.
The forest is divided into two large areas or tracts on United States Geological Survey maps, a northern and southern portion. The west border of the forest adjoins Angeles National Forest and runs north-south about ten miles west of Interstate 15. At its widest parts, the northern portion of the forest runs about 57 miles (90 km) on an east ...
The east side is drier, with chaparral and open woods of pine (including Coulter pine and gray pine) and oak woodlands of several Quercus species. The range is the southernmost native location of about 225 plant species including the coast redwood trees and the northernmost home for about 90 species.
These stands are composed of Jeffrey pine, ponderosa pine, Coulter pine, sugar pine, singleleaf pinyon pine, white fir, and incense cedar. [7] Snow is common in the winter above about 6,000 feet (1,800 m), though overall the climate of the mountain range is Mediterranean, with mild rainy winters and warm, dry summers.
In 2001, an 18-year-old committed to a Texas boot camp operated by one of Slattery’s previous companies, Correctional Services Corp., came down with pneumonia and pleaded to see a doctor as he struggled to breathe.
Coulter pine (Pinus coulteri) or; Gray pine (Pinus sabiniana) Common wildlife include Steller's jay, chestnut-backed chickadee, western gray squirrel, raccoon and many others. These forests are more diverse in animal life than those having only conifers. The predominance of broadleaf trees provide a greater abundance of food sources.