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Thank you, Matt I'm hoping I get your meaning right and reply... The background of N. ‘Koho’ is uncertain, unfortunately. It's an unregistered variety to The International Daffodil Register and named by an alpine nursery in Japan, The Alpine Garden YAMAKUSA. According to the nursery owner, the seeds were from an alpine plants society’s seed exchange and labelled as something mysterious ‘Narcissus cantabricus conspicuus’. The seedlings’ flowers varied in colour and blooming time, then a plant with relatively early blooming deeper yellow flower was selected and named. I feel some N. bulbocodium influence from it (long, upright and glossy leaves and relatively shorter stamens) so perhaps a hybrid origin with N. bulbocodium and N. cantabricus.The daffodils in Bulbocodium Section are minor plants in Japan. There are a few alpine/bulb nurseries breeding actively with small narcissus (as owner’s hobby) but they don’t look being interested in registering names and vegetative propagation to sell them. I only know 1 nursery to sell its original breeding narcissus commercially in Japan (below).KOMORIYA Nurseryhttp://item.rakuten.co.jp/komoriya-nursery/c/0000000173/http://item.rakuten.co.jp/komoriya-nursery/c/0000000192/
It's look more likely to be N. bulbocodium conspicuus and someone got confused with the name on the packet.
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