The fossil flora of the Jabalpur group; 1, Ptilophyllum institacallum n.sp
The fossil flora of the Jabalpur group; 1, Ptilophyllum institacallum n.sp
Bose, M.N.
Palaeobotanist, Lucknow; "Ptilophyllum institacallum n: characterized by its thick lower cuticle with cells having variously shaped papillae. The stomata are irregularly scattered over the lower cuticle which shows no distinction between stomatiferous and non-stomatiferous bands.". 7(1): 26-28