Wiktionary
pyrophyte
n. (lb en biology) Any plant that is resistant to fire, or that needs fire to propagate
Wikipedia
Pyrophyte
Pyrophytes are plants which have adapted to tolerate fire. "Pyrophyte" comes from the ancient Greek "pyros" (fire) and "phytos" (plant).
Fire acts favorably for some species. "Passive pyrophytes" resist the effects of fire, particularly when it passes over quickly, and hence can out-compete less resistant plants, which are damaged. "Active pyrophytes" have a similar competing advantage to passive pyrophytes, but they also contain volatile oils and hence encourage the incidence of fires which are beneficial to them. "Pyrophile" plants are plants which require fire in order to complete their cycle of reproduction.