Newly described by Sainge & Kenfack (2015) from a single plot of 400 sqm in Jengi Forest/Cameroon. It is the second species of the genus, which so far was only known from Tanzania. Kihansia species differ from the related Kupea spp. by a perianth cavity in at least the male flowers, i.e. the petals are fused at the base but free in Kupea spp. Kihansia jengiensis in contrast to Kihansia lovettii from Tanzania has an inflorescence without a sterile upper part (the upper half to three quarters of the inflorescence in K. lovettii has prominent bracts but lacks flowers), and the lower petal lobe is not divided (often bifid or trifid in K. lovettii).
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