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オカメザサ receives an avoid result in the evidence table. The cited classification assigns Shibataea kumasasa 0 on a 0–3 fire-protection-power scale and marks it unsuitable.
Its accompanying text describes highly protective trees as slowing spread, directing heat and smoke upward, and intercepting flying embers. That tree context does not transfer those effects to this grass; its own row remains in the unsuitable class. The score and class belong to the same table entry.
The status above is computed from the cited rows below: independent recommendations can support a fire-resistant result, an avoid row can produce keep-away, and disagreement stays visible as conflict. Placement notes preserve each source’s own scheme rather than translating unlike rules into one scale. This is evidence about a plant, not permission to plant it in every part of the defensible space; Zone 0 remains noncombustible.
Where its sources say to plant it
Placement rules below use each source's own distances or named zones, tied to its rating.
They are not interchangeable with the directory's current Zone 0 guidance.
Tree fire-protection classification in Hito to Shinrin: オカメザサ — Table 10-2 [tadaki-kira-1982-fire-protection-power] (with its avoid rating)
The evidence
Grouped by what each source concluded. Primary evidence rated the plant itself
(a lab, field program, or original curation); corroboration compiled or
republished another source's rating and resolves to its root lineage.
Avoids (1)
Tree fire-protection classification in Hito to Shinrin (人と森林) — Kyoritsu Shuppan; table reproduced by Kagoshima Prefecture · Hito to Shinrin (1982), Table 10-2; Kagoshima web reproduction · original sourcePrimary evidenceExpert-curatedlineage: independent (root of Japanese municipal fire-protection tree lists)
Table 10-2 prints オカメザサ in the unsuitable fire-protection-power class. The Kagoshima reproduction says highly fire-protective trees can slow spread, promote upward dispersal of heat and smoke, and intercept flying embers.
