Polystichum kruckebergii from the Sierra Buttes (two years ago - wish I was there now!) #fernfriday #fernsofinstagram https://instagr.am/p/CGseUccp3Aa/
A Small Number of Gametophytes with Gametangia and Stunted Sporophytes of Antrophyum obovatum Baker (Pteridaceae): The Suppression of Functional Sporophyte Production by Prezygotic and Postzygotic Sterility. http://dlvr.it/Rr9wwH