On the evidence table, the computed direction and source-depth flag stay separate from the named condition. The californica record therefore holds one on-list result, one green state, and one limited-evidence classification in distinct roles. None is used to widen another or to speak for a different laurel entry. The California laurel species entry remains the boundary for that three-part reading and its source links here.
Form
tree
Region
EE. UU.
Rated in
California; Global
On this lot
1. Fire evidence and conditions
Fire evidence
Fire-resistant — location does not change the cited classification.
The UC Forest Products Laboratory says the guide covers properties of common California landscaping plants and was prepared for California fire agencies. FireApproved publishes 130 exact owners at historical California publication scope. The report is a 1997 compilation, not a current endorsement, site rating, or independent test of every row.
2. Why this plant is relevant here
State distribution
Native range
Current cited native range in CA, OR.
Introduced / established
USDA hardiness
3. Legal, ecological, and broader status
Legal-list status
Seed-list status
Reported invasive here
Broader regional context
Federal context
How to read this page
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.
Native and introduced range evidence
These are exact U.S. botanical-area records from the cited range source. Native and
introduced describe biogeographic relationship, not fire performance or planting approval.
Doubtful and extinct rows stay visible but do not count as current presence.
The lossless worldwide derivative is retained once in the research corpus; object pages repeat only exact U.S. areas needed by the local lens. The JSON twin carries the same page assertions.
Conditions in the fire evidence
These describe tested or rated plant material. They are not horticultural maintenance instructions.
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.
Landscape for Fire Protection: irrigated hillsides [maire-1968-fire-protection-landscape] (with its recommendation)
Defensible Space Landscaping in the Urban/Wildland Interf…: Chapter 4, Landscape Vegetation Database [ucfpl-1997] (mid-scale 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.
Umbellularia californica (California laurel) appears in the source's conditioned examples for landscaping irrigated hillsides. Fuel volume is to be minimized, plants watered to their needs, and accumulated litter removed.
4 cited rows from this source; its identity, lineage and tier are stated once.
Primary study Varner2017: Varner, J. M., Kuljian, H. G., & Kreye, J. K. (2017). Fires without tanoak: the effects of a non-native disease on future community flammability. Biological Invasions, 19, 2307-2317.
Shared row context: plant part litter; fuel all; predrying yes; device burning bench; site Varner2017-1; sampling ND.