Which one is the most cold-hardy palms in the world, Halimodendron or Rhapidophyllum?
Rhapidophyllum Rhapidophyllum hystrix, the needle palm, is a palm, the sole member of the genus Rhapidophyllum. It is native to the subtropical southeastern United States. Endemic populations can be found from coastal southeast South Carolina, southward to Florida and west across the coastal plain of Mississippi and southern Alabama. It is one of the most cold-hardy palms in the world, and can be found growing in several areas with warm temperate climates.
Rhododendron rubiginosum Rhododendron rubiginosum (红棕杜鹃) is a rhododendron species native to Myanmar, and Sichuan, Xizang, and Yunnan in China, where it grows at altitudes of 2800–3600 meters. It is a shrub that grows to 1–3 m in height, with leaves that are elliptic or elliptic-lanceolate or oblong-ovate, 3.5–8 by 1.3–3.5 cm in size. Flowers are pink, red, or pale purple.