They are common in CA foothills, kind of droopy looking pines with 3 grey-green needles per bundle. They also have main branches located relatively low on the main trunk and compared to other pines, they are sparsely leaved.
Coulter pine, which has really cool cones that have curved scales:
Common in Bay Area and southern CA, 3 needles per bundle with stiff green needles. It's cone is of a lethal size. By which I mean you really, really don't want one to land on you.
Lodgepole pine, with HUGE cones. As our herbarium curator told us: don't eat lunch under this tree!
This thing only has 2 needles per bundle. It's common to mid and upper elevation pine forests in Seirra Nevada and the Rocky Mountains. That lab manual next to it is just about 8.5 by 11 inches, so you have something to scale it to.
Another one of the cool coulter cone. (See? Alliteration makes everything better.)
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