What is " N " ?
" N. bongso " × " N. gymnamphora " " N. bongso " × " N. singalana " " N. bongso " × " N. talangensis " In his 1928 monograph " The Nepenthaceae of the Netherlands Indies " , B. H. Danser mentioned what he thought was the hybrid " N. bongso " × " N. pectinata " ; however , this plant material is now known to represent " N. densiflora " , a species described by Danser 12 years later .