This submission call is now closed. You can find calls that are still accepting contributions at Calls for Submissions.
From Lethe Press (http://www.lethepressbooks.com/call-for-submissions.html):
HIS SEED: MAN/PLANT EROTICA
No, we’re not joking. We are seeking strange and homoerotic tales of men and plants. We want to read about the trysts of the Green Man and male dryads. Give us carnivorous plants trying to devour Tarzan. If people can write and sell books about dinosaur billionaires having their way with the intern, imagine what a really good writer could do with a fern and a few good men!
Stories should be 1,500 to 6,000 words long. Payment is 5 cents a word upon publication. Stories should be submitted to firstname.lastname@example.org with the subject HIS SEED SUBMISSION. We’ll be choosy about reprints and pay less for them (unless they are very good trimmings).
The deadline is December 31st. 2015