https://www.rhs.org.uk/plants/183520/ophiopogon-planiscapus-albovariegatus-(v)/details
Ophiopogon planiscapus 'Albovariegatus' (v) | /RHS
ophiopogon planiscapusvrhs
https://www.gardenersworld.com/plants/ophiopogon-planiscapus-kokuryu/
Ophiopogon planiscapus 'Nigrescens' | BBC Gardeners World Magazine
Plant profile of Ophiopogon planiscapus 'Nigrescens' on gardenersworld.com
bbc gardeners worldophiopogon planiscapusnigrescensmagazine