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Eranthis byunsanensis is a synonym of E. pinnatifida by The Plant List (http://www.theplantlist.org/tpl/record/kew-2791909), so I put 'cf.' before specific epithet about the file name of attached pics In anyway, this eranthis looks different to E. pinnatifida particularly by its petal (nectary) colour and shape for me The picture size is larger than usual for ID
For the ITS phylogeny, E. pungdoensis could not be distinguished from E. byunsanensis. However, the clade of E. byunsanensis, including E. pungdoensis, was separated from Eranthis pinnatifida of Japan, which has a distinct ribotype and forms a sister group.
I was actually looking at some sites that listed Eranthis byunsanensis today. This is called 'hinamatsuri-sou' in Japan, correct? I can see an obvious difference between it and E. pinnatifida, specifically the color of the green nectary. What about the flower size? Are they bigger than pinnatifida?
Wonderful plant YT,that's another white flowering form which is not very distinct. According to the "The Korean Journal of Plant Taxonomy" there is a genetic difference,QuoteFor the ITS phylogeny, E. pungdoensis could not be distinguished from E. byunsanensis. However, the clade of E. byunsanensis, including E. pungdoensis, was separated from Eranthis pinnatifida of Japan, which has a distinct ribotype and forms a sister group. Or is it the same as Eranthis stellata (??): http://feelgreen55.blogspot.com/2010/03/shibateranthis-stellata-eranthis.htmlMy best guess would be that (almost) all white flowering species (E. stellata, E. pinnatifida, E. sibirica, E. albiflora (and E. byunsanensis)) have the same parent plant and separated into different species quite recently. When the plants got dispersed (for example by geodispersal when Japan separated from the mainland) the different species changed according to their environment (resulting in visible changes for example, like between E. sibirica and E. pinnatifida or only on the genetic level, like between E. pinnatifida and E. byunsanensis).
Whatever the name, they are very beautiful plants. Your E. byunsanensis is a very good form!!
Brian and Wim, cheers I bought a new camera last year and it works very well
Art, you are forgetting most important thing!!! Go to a travel agent and book a flight to Japan in mid-April for collecting seeds of those