It seems we have no page for the 'Kiku-shidare-zakura' cherry. Here is the page from our Ornamental Cherries of Vancouver book. And Douglas Justice's text from the festival Cherry Cultivars page: I was looking to see if we had photos of the sepals, because on my walk today, Erin Younger mentioned how they seemingly always have extra sepals, and she sent me photos. I'll see if she'll post them, else I will.
By happy co-incidence, Kiku-shidare-zakura is opening on VanDusen's Great Lawn at the same time that Yae-beni-shidare is in bloom, so we can compare them, should there be any confusion between the two. At April 15, 2021. Here are the dangling miniature roses of Yae-beni-shidare. Here are the round little pompoms of the Weeping Chrysanthemum Cherry—the two floral symbols of Japan in one botanical entity. "Kiku" is Japanese for chrysanthemum, and "zakura/sakura" for cherry. Overall tree shape may be similar since they're both "weepers" (shidare) but as VanDusen can prove, the blossoms are quite different.
And, they are not supposed to be in bloom at the same time, with 'Yae-beni-shidare' supposed to show up in early mid-season, or mid mid-season, and 'Kiku-shidare-zakura' supposed to be in late season. These things are so unruly.