A fellow master cryptocoryne cultivator in Japan managed to bloom C. sp. 'Sedili 6' and my explorer friend managed to obtain some photographs from him and posted them in his blog: see this posting!!!. From the appearance of the leaves, my explorer friend guessed previously that it could be comparable to C. decus silvae.
From the latest development with the verification of a blooming spathe, I thought that C. sp. 'Sedili 6' could be possibly comparable too to C. sp. 'Kota Tinggi' (which is good news since the currently only known habitat of C. sp. 'Kota Tinggi' had been destroyed already) or even C. jacobsenii??? What do you think?