FA Exhibit ID-004. Douglas-fir is neither: the cone with tongues. Morphology from USFS FEIS PSEMENM and USFS Silvics of North America. Specimen after Sudworth 1908, fig. 36, public domain. Identification only — no flammability claim. Confirm uncertain material with a regional key or a botanist. CC BY 4.0.
Technical review: Grayson Graham. Last verified 2026-08-25. JSON
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<img src="https://fireapproved.com/diagrams/id-004-douglas-fir-cone-with-tongues.svg" alt="A public-domain coast Douglas-fir specimen and enlarged cone show the conspicuous three-pointed trident bracts protruding between cone scales. Taxonomy labels Pseudotsuga as distinct from true firs in Abies and spruces in Picea." />
