lxxiv INTRODUCTION. 



LXXXV. Eestio family. Perianth calyx-like. Flowers unisexual. Ovary 

 with one pendulous ovule in each cell. 



#*## Perianth rudimentary or none, replaced by chaffy scales or bracts enclosing 



the flowers. 



LXXXVI. Sedge family. Leaf-sheaths entire. Each flower in the axil of 

 one bract. 



LXXXVII. Grass family. Leaf-sheaths split open opposite the blade. 

 Each flower enclosed in two bracts. 



CLASS III.— CRYPTOGAMS. 



No true flowers ; that is, no stamens or pistils. 



LXXXVIII. Clubmoss family. Spores in closed capsules on the stem, or in 

 the axils, or in the base of the leaves. 



LXXXIX. Equisetum family. Stems jointed, with whorled branches. Spores 

 under peltate scales, in terminal ;^ads or spikes. 



XC. Fern family. Spores in minute cases or capsules clustered on the back 

 or margins of the fronds. 



The remaining families of British Cryptogams are not included in the present 

 Flora. 



