Thank you very much for the clarification Camille!
I want to have only one species of each genus in bloom at a given time as the potential for hybridization between such species is higher than with other orchids and i want to be producing pure seeds easily,without having to protect the flowers or remove the pollinia of all flowers. I dont know what the chance of C. maxima and S. brevipedunculata is to share the same pollinator,if they have/find one,in my country. Thinking of the shape and size difference of their flowers i must say it shouldnt be very likely and probably i am worrying for nothing. Also,the fact that they were in different genus says a lot about their differences. What do you think?
I surely do want many things in bloom but without risking unwanted hybridization