Nepenthes ×rufescens
Hybrid parent formula
"This is stated to be a cross between N. Courtii x out of N. zeylanica rubra. N. Courtii itself is a cross between an unnamed Bornean species and N. Dominiana x, this latter being also a cross between N. Rafflesiana and the same undetermined Bornean species; so that our present plant is very much crossed, and combines the blood, if one may so say, of three species and of two hybrids." A