Do Maple Trees have "Male" and "Female" Sexes?

Question

I saw two maple trees side by side. They appear to be the same species as they are all in the same strip-mall and look the same the rest of the year. However, now that they are getting their leaves back and flowering, these two trees look very different. The leaves look different on each. One is smaller... maybe these are flowers? I read this article that tells me that they are either male or female, and sometimes a little of both, and they tend to trade off in different seasons... Can someone explain this to me in simple layman’s terms?

I found this article: http://arnoldia.arboretum.harvard.edu/pdf/articles/652.pdf

I re-read the article, and found this:

Overall, the population is clearly bimodal
in sexual expression. Male plants made up 75 percent of the population, 23 ercent of the population were females, nd 2 percent of the population varied in sex expression. However, of the 77 plants that could be clearly designated as either male or female plants, 12 plants were inconstant in gender and showed at least some evidence of producing flowers of the opposite
sex.

So in answering my own question, these two trees probably one was female and one was male...

Answer 1

Red maples (Acer rubrum) and box elders (Acer negundo) are dioecious.

Answer 2

There are many different types of maple trees (red, silver, sugar, and box elder to name a few.) Most Trees (maple) are both male and female. The female organs are at the top of tree and male toward the bottom. This is to keep the pollen from the male from falling down to the female organs and reproducing from the same tree.

Answer 3

All the variations are possible-

see the link --http://delta-intkey.com/angio/www/aceracea.htm

Answer 4

yes. every plant that u see hav male or female sexes.