Pinus contorta and Pine tree

Pinus contorta noun - Shrubby two-needled pine of coastal northwestern United States; red to yellow-brown bark fissured into small squares.

Pine tree and Pinus contorta are semantically related. In some cases you can use "Pine tree" instead a noun phrase "Pinus contorta".

Pine tree noun - A coniferous tree.

Pinus contorta and pine tree are semantically related. Sometimes you can replace phrase "Pinus contorta" with "Pine tree", this phrases are similar.