Hysteranthous -blossom before leaves.
Pears do this. Apples which flower a few weeks later take the usual leaves first course to the spring weather shielding the delicate flower buds from frost etc. this has the downs of more energy needed to grow the leaves, and more competition for pollinators. Pear which are more cold hardy have evolved to flower dramatically as early as possible in Spring to attract bees etc but run the risk of losing all with a late frost.



























