Pine Cones Burned After A Forest Fire. Pinecones On A Burned Tree. Some Tree Species Delay Seed Fall Because Their Cones Are Dependent On A Brief Blast Of Heat To Release Seed. This Dependency On Heat During The Seed Production Cycle Is Called Serotiny And Becomes A Heat Trigger For Seed Drop That May Take Decades To Occur. In Environments Where Hot, Fast-Moving Fires Are Frequent, Some Pine Species Have Developed Thick, Hard Cones That Are Literally Glued Shut With A Strong Resin. These “Serotinous” Cones Can Hang On A Pine Tree For Years, Long After The Enclosed Seeds Mature.

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ash-covered bare blast blowup bootleg brown brush burn burned burning burst caution cautious cloud cones crown danger dangerous destroyed exposed extinguish extreme fire firefight firefighter firefighting fires flame flames flash forest forestry fremont fuego fuel fuels glue ground heat high hot ignite indication lightning massive national nature oregon pinecones precaution prevent prevention protection rewild rewilding safety seed serotinous serotiny signs smoke smokey thinning torch trees trigger understory vegetation warn warning winema wood wildfire burnt wildland ecology