Mojave Desert Trees:
SPECIES: Pinus monophylla
Singleleaf pinyon is long-lived. Large trees can monopolize site resources over a life span of 350 years or more. Dominant pinyons are often 400 years old and have been known to reach 800 to 1000 years.
The ecotones between singleleaf pinyon woodlands and adjacent shrublands and grasslands provide favorable microhabitats for singleleaf pinyon seedling establishment ...
Singleleaf pinyon is adapted to a wide variety of sites. It usually grows on pediments, dry, rocky slopes, ridges, and alluvial fans and is rarely found on valley floors.
... between 10 and 20 years, tree seedlings appear, their presence becoming important after about 50 years; site is again woodland with low understory cover after 70 to 80 years.
Cones develop slowly the 1st growing season, being 1/4th their mature size by September, and pass the winter this way. The following spring, the yearling cone starts to grow again, ...