My very knowledgeable friend wrote this:

It's called 'Double Blue Picotee' (a hybrid) and this one didn't develop any doubleness, which is a very common occurence

Hi Joseph - Nice rich blue coloration on that definite kikyo shaped bloom that you have there...

The marketing names , most especially Western sales related names , as designed to sell Japanese type of asagao to western markets can sometimes contribute to very confusing ideas regarding these type of plants...

I don't know as to whether this blue kikyo has any more specific japanese name ( although it likely does) but the 'double blue picotee' phrase is a common Western marketing name and is not typically used by the Japanese to describe these types of kikyo shaped flowers...

There are many kikyo strains that always remain single although many people mistakenly automatically associate the term kikyo to 'represent' a type of double flower...
there are kikyo which are usually double but sometimes throw singles or single type reproductive parts otherwise the plant could never produce any seeds...
plants which always produced all double parts could not produce any seeds...
additionally there are many types of non kikyo shaped Ipomoea nil which sport a white or lighter outer limb margin...

There have been crosses of the kikyo shaped flowers with the various youjiro as hybridized by Dr.Yoneda and these could technically be referred to as real inter-specific hybrids although the vast majority of kikyo shaped flowers are categorically intra-specific crosses of Ipomoea nil and are therefore not hybrids in a strict sense...

I prefer to refer to them as kikyo (either double or single) along with the flower colors displayed to disambiguate the many different types of kikyo from other types of Ipomoea nil...

Hope that helps to elucidate for those interested...

TTY,...

Ron

Hi,
I got a packet from Japan that said Kikyo on the front among other words. There was probably something that meant picotee too. I asked a lady from Japan who I know to translate it for me. Anyway, she told me Kikyo means Balloon Flower like platycodon or even possibly a campanula. Which makes absolute sense, the blooms are shaped like a balloon flower. On the packet, there are blooms pictured that have a bit of doubling going on so I'm sure that there is a term meaning double kikyo, but as I said kikyo in of itself just means balloon flower,
Remy