

Fu;. i6.— Tvpes of living Lycopodineae. A (x i), B ( ■ about i), C ( -about 



i), all Club-mosses (Lycot)odiitm species); D ( ■' i), a Spike-moss {SelagmeUa} ; 



E ( ■: about h), a Quillwort (Isuetes). 



58 



