Flower angle favors pollen export efficiency in the snowdrop (Linnaeus, 1753) but not in the lesser celandine (Huds, 1762).

Flower angle is crucially important for accurate pollination and flower protection against abiotic factors. Evolutionary factors shaping floral traits are particularly strong for bilaterally symmetric flowers because these flowers require more pollination accuracy than radially symmetrical flowers. We experimentally investigated the flower angle in the snowdrop's () radially symmetrical, early-blooming downward flowers.