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Alders
Most rated Alnus records are fire-resistant — 8 of 13 records, including the genus rated as a group. These counts describe the cited records — 13 records carrying 54 evidence rows from 32 cited sources; they do not make one verdict for the genus.
Rated as a group: Mountain alder Alnus Fire-resistant Consensus 5 sources rate the genus as a
whole. Species evidence never rolls upward into a genus verdict, and genus claims never
override a species record.
› Fire-resistant
7 species
-
Smooth alder Fire-resistant Alnus serrulata -
Alders – Mountain Alder* Fire-resistant Alnus incana ssp. tenuifolia -
Red alder Fire-resistant Alnus rubra -
White alder Fire-resistant Alnus rhombifolia -
European alder Fire-resistant Alnus glutinosa -
Spotted Alder Fire-resistant Alnus rugosa (or serrulata) -
Italian alder Fire-resistant Alnus cordata
Keep away
2 species
Awaiting evidence
3 species
- Alnus hirsuta Awaiting evidence Alnus hirsuta
-
Speckled alder Awaiting evidence Alnus incana - Alnus crispa Awaiting evidence Alnus crispa
About alders
Corpus context. Alnus is the directory's #34 largest of 550 genus groups: 13 records carrying 54 evidence rows from 32 cited sources, recorded as tree, shrub , hardy across USDA zones 2–8. Those are corpus facts, not a whole-genus flammability claim.
More about Alnus: Wikipedia — external references; not evidence sources.