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Rocky Mountain Bristlecone Pine Pinus aristata (Pinaceae) HEIGHT to 10m. Small, slow-growing tree. LEAVES Needles, 2–4cm long, dark green, often flecked with white resin; turpentine-scented and persist for many years. REPRODUCTIVE PARTS Cones, to 6cm long; 6mm-long spine on each scale. STATUS AND DISTRIBUTION Native to Rocky Mountains, rarely planted here.