These are almond tree flowers.There are bitter almonds and sweet almonds here; the bitter usually bloom first, I believe. Because they are hardier but not tasy, bitter almonds are often used as graft trees: buds of sweet almond are grafted onto bitter almond hosts. Thus you get sweet almonds from a hardy tree. Folks here eat almonds as most of us know them, but also the green nuts before they're mature. These fuzzy green snacks are slightly bitter but good especially with salt.