Order 16. =Leskeaceæ.= Dull-looking Mosses, with papillose or warted leaves.--_Thuidium_, _Thuja_-like with regularly arranged 1–3 doubly pinnate stems; _Anomodon_, _Leskea_. Order 17. =Pterogoniaceæ.= _Pterigynandrum filiforme_, etc.