Happy #FernFriday and the third week of #51WeeksOfPteridophytes! This week is devoted to the quillworts, Isoetaceae. This is the smallest family in the lycophytes, with about 250 species according to PPG I, all in the only extant genus, Isoetes. 1/
Polystichum kruckebergii from the Sierra Buttes (two years ago - wish I was there now!) #fernfriday #fernsofinstagram https://instagr.am/p/CGseUccp3Aa/