Are both Rhapidophyllum and Spartium flowering plants?
Rhapidophyllum: Rhapidophyllum hystrix, the needle palm, is a palm, the sole member of the genus Rhapidophyllum. Rhapidophyllum:  It is native to the subtropical southeastern United States. Rhapidophyllum:  It is one of the most cold-hardy palms in the world, and can be found growing in several areas with warm temperate climates.
i don't know