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Madrones Arbutus

The rated Arbutus records split: 0 fire-resistant, 0 keep-away, 1 in documented conflict. These counts describe the cited records — 4 records carrying 218 evidence rows from 39 cited sources; they do not make one verdict for the genus.

Rated as a group: Κουμαριά Arbutus Awaiting evidence Limited evidence 1 source rate the genus as a whole. Species evidence never rolls upward into a genus verdict, and genus claims never override a species record. ›

Documented conflict

1 species

honest ties — treat conservatively near structures

Strawberry tree Documented conflict Arbutus unedo Valencia's low-flammability guide says low · The ignition index based on flammability of vegetation im… says high genus-level claims ↑

Awaiting evidence

2 species

About madrones

Corpus context. Arbutus is the directory's #177 largest of 550 genus groups: 4 records carrying 218 evidence rows from 39 cited sources, recorded as shrub, tree , hardy across USDA zones 8–8. Those are corpus facts, not a whole-genus flammability claim.

More about Arbutus: Wikipedia — external references; not evidence sources.

Where rated madrones grow

Tagged as growing in 4 states.

Equal-weight public-domain botanical specimens compare greenleaf manzanita with Pacific madrone. A shared height axis shows the three-to-seven-foot shrub range against the sixteen-to-one-hundred-thirty-foot tree range. — **FA Exhibit ID-006.** Manzanita or madrone: red bark, different scale. Morphology from USFS FEIS ARCPAT and ARBMEN. Plates: USDA Agriculture Handbook 148, p. 190, and Sudworth 1908, fig. 200, public domain. Identification only — no flammability claim. Confirm uncertain material with a regional key or a botanist. CC BY 4.0.

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