"Fire-resistant plants are those that do not readily ignite from a flame or other ignition sources. These plants can be damaged or even killed by fire; however, their foliage and stems do not significantly contribute to the fuel and fire’s intensity. There are several other significant factors that influence the fire characteristics of plants, including plant moisture content, age, total volume, dead material, and chemical content. […] There are no ‘fire-proof’ plants. " Plants - Sustainable Defensible Space
It is worthwhile to pick for our landscape native plants, well irrigated, with a foliage that does not ignite readily. The selection of these plants, however, is not the most critical factor to the survival of our homes: other factors in firescaping are.