The stems (and the branches) hold between 3 and 8,[1][2] or 9 flowers.[3]:123 Each stem carries 2–3 flowers,[15]:17 at the terminal end of each branch,[5] there is always a single flower per stem.[10] It blooms early in the season,[15]:17 between late spring and early summer,[6] between May,[7][16] [17] and June.[10][11]