This tree is past its prime blooming period, but it is full of blossoms, at the same time that the latest of the late ornamental cherries are in bloom (except serrula, which will be out this week or next). Kuitert (Japanese Flowering Cherries) keys it out to Prunus serrulata var. pubescens, which is also known as P. verecunda or Kasumi-zakura, Korean mountain cherry. Is that different from Korean hill cherry? The description fits in some respects, but he doesn't mention those serious sepal edges, which would be the first thing I'd mention. Also, that cultivar is supposed to have hairs on the leaf undersides and hardly any awns on the leaves, and I think this is different in both respects. It's hard to see Gakken's photo (Flowering Cherries in Japan) on page 46-47 (called Cerasus leveilleana; Mariko said the Japanese says Kasumi-zakura), but the sepals don't look similar. This tree is on the south side of the UBC parking lot at Agricultural Road, across Lower Mall from the First Nations Longhouse. The blossoms were 3cm, white, single, no apparent phylloids or staminodes. No fragrance. Peduncles are very long, and there were generally four pedicels in an umbel formation hanging from the peduncle, with sometimes another one or two a little above them. This was the best I could do for a bud photo. Stems and calyxes were hairy, and there were more than just this one flower with an extra sepal. Sepals have long spiked edges. There was one Siamese twin. There was no obvious difference in colour to the leaf front and back. Leaf edges are more coarse than 'Somei-yoshino'.