Pacific silver fir and Silver fir

Pacific silver fir noun - Medium to tall fir of western North America having a conic crown and branches in tiers; leaves smell of orange when crushed.

Silver fir and Pacific silver fir are semantically related. In some cases you can use "Silver fir" instead a noun phrase "Pacific silver fir".

Silver fir noun - Any of various true firs having leaves white or silvery white beneath.

Pacific silver fir and silver fir are semantically related. Sometimes you can replace phrase "Pacific silver fir" with "Silver fir", this phrases are similar.