whitebark pine: small pine of western North America; having smooth grey-white bark and soft brittle wood; similar to limber pine
white pine: any of several five-needled pines with white wood and smooth usually light grey bark when young; especially the eastern white pine
bur oak: medium to large deciduous oak of central and eastern North America with ovoid acorns deeply immersed in large fringed cups; yields tough close-grained wood