Here is another demono strain of Ipomoea nil I am growing. The fertile form has normal shaped cotyledons. The demono form(s) are infertile and can be identified by cotyledon shape (gnarly curled edge).
I grew one seed out and got lucky with seeing a demono flower form. I posted its photos in another thread but will repost here. I am growing out more plants to see the other flower forms.
This is a demono flower form for Ki Beni Hukurin Shishi Botan Ryu'uhade - Shishi Strain.