Pine, Ponderosa pine, Pinus ponderosa, Detail showing spiky nature of the tree.

Pine, Fir, Spruce, Norway spruce cones growing outdoor on the tree.

Hoarfrost on pine tree, Oregon, USA.

Grand fir Christmas trees with red bow on one, Oregon, USA.

Gnarled exposed roots of Bristlecone Pine Tree, Ancient Bristlecone Pine Forest, Inyo county, California, USA.

Pine, Fir, Spruce, Picea.

Pine, Scots pine, Pinus sylvestris.

Conifer.

Conifer, Thujopsis dolabrata.

Fir, Abies.

Pine, Fir, Spruce, Picea.

Pine, Fir, Spruce, Picea.