Needles: Pines have needles in bundles (fascicles) of 2–6; firs have single needles attached directly to twigs.
Other Traits: Bark, cones, and habitat preferences also differ.
Resource: Visit forestry.about.com for detailed comparisons and identification keys.
Both are conifers but belong to different genera (Pinus vs. Abies).
Thatching Ants at Base of Large Fir Tree: No Threat to Tree Stability
Planting Redbud Near Pine Trees: Light Is the Key
Small Pine Transplanting in Sandy Soil: Root Depth, Timing, and Technique
Thinning Overcrowded Cedars and Pines: When and How to Manage a Dense Screen
Identifying and Controlling Sawfly Larvae on White Pines
Lava Rock vs. Wood Mulch for Pine Trees: Removing Plastic Barrier
Nothing Grows Under Pines? It's Shade and pH, Not Just Needles
White Pine vs. Red Pine: Identification and Commercial Value
Controlling Pine Seedlings in Hardwood Forest
Understanding Natural Cone Production Cycles in Ponderosa Pine
Ground Cover & Grass for Pine Tree Shade in Ibiza: Acid-Loving Plants & Warm-Season Grasses
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