Nepenthes × ferrugineomarginata (; from Latin ferrugineus "rust coloured" and marginatus "margined") is a natural hybrid between N. albomarginata and N. reinwardtiana.McPherson, S.R. & A. Robinson 2012. Field Guide to the Pitcher Plants of Borneo. Redfern Natural History Productions, Poole. It has been recorded from the islands of Borneo and Sumatra.McPherson, S.R. & A. Robinson 2012. Field Guide to the Pitcher Plants of Sumatra and Java. Redfern Natural History Productions, Poole. The type specimen was collected by Shigeo Kurata in Kenukat, West Kalimantan, in 1981. Kurata described the hybrid the following year. The name is a nomen invalidum as it was published without a Latin description.Nepenthes × ferrugineomarginata Sh.Kurata. International Plant Names Index (IPNI).
Nepenthes × ferrugineomarginata has the longest binomial name of any plant in the genus.
References
Carnivorous Plant Database: Nepenthes × ferrugineomarginata