HaLeivi, the Bracha is recited next to a fruit tree that is blossoming. That’s why the list is so useful. There are many varieties of blossoming trees that don’t bear fruit. Even if they’re called “cherry blossoms”, most of those trees are a different variety and never go on to produce a real edible cherry. And for those of us in the NE US, (that’s you in Flatbush, hakohen & hocker in brooklyn) it’s possible Rosh Chodesh Iyar will have arrived before we see a fruit tree blossom. We still have a few days left and have to hope they’re warm and sunny enough to unfurl those buds, though most will agree that the Bracha can be recited even after Nisan.