Cycas ferruginea is a plant species native to Vietnam and to the Guangxi region of China. It grows on rocky crevices in forested areas at elevations of 200–500 m.Flora of China v 4 p 6 Cycas ferruginea It is known from a belt of limestone bluffs in Lang Son Province and Thai Nguyen Province in Vietnam, and in western Guangxi Province, China. It is also cultivated at the Guilin Botanical Garden, Guangxi.Whitelock, Loran M. 2002. The Cycads. Portland: Timber Press.
Cycas ferruginea has pinnate leaves up to 2 m long. Seeds are brown, egg-shaped, up to 3 cm long.Wei, Fa-nan 1994. Guihaia 14(4): 300, f. 1–6, Cycas ferruginea
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