The flowers can be either hermaphrodite or of separate sexes.
The salmon aeolis has separate sexes, with almost no external differences.
The majority of crustaceans have separate sexes, and reproduce sexually.
Most crustacean species have separate sexes with entirely different body plans.
And they wanted to, because, concealed or no, their separate sexes mightily attracted each other.
You ask about my doctrine which led me to expect that trees would tend to have separate sexes.
Many species have separate sexes, but others are hermaphroditic.
The school was opened in 1941 and originally consisted of two separate single sex secondary modern schools.