vxv viii INTRODUCTION. 



Herbs. Stamens 6. Leaves 3 in a whorl. Flower single. TKILLIACEJE 475 



Leaves alternate, sheathing. COMMKLYNAi'E/K, 487 



Stamens 3. Flowers perfect, solitary. Stem leafy. MAYACU'EK. 496 



Flowers perfect, capitate. Scape leafless. XYKIDACE^E, 4'J'J 



Stamens 3 or 4. Flowers monoecious, capitate. Scape leafless. 



EKIOCAULONACEiE, 602 



» * * Flowers glumaceous, i. e. with scale-like bracts, in place of proper floral envelopes. 



Bracts single. Sheaths closed. Fruit an achenium. CYPERACEiE, 504 



Bracts by pairs. Sheaths open. Fruit a caryopsis. GKAMINE.E, 545 



Series II. CRYPTO GAMOUS or FLOWERLESS 

 PLANTS. 



Plants destitute of proper flowers, and producing, in place of 

 seeds, minute bodies (spores) which do not contain an embryo. 



Class HI. ACROGENS. 



Tlants with a distinct stem containing woody and vascular tissue, 

 growing from the apex only. 



Fructification borne on the under side of a peltate scale. EQUISETAI I 



Fructification borne on the back or margins of the leaves (fronds). FILIC ES, 686 



Fructification borne in the axil of small leaves or bracts. LYCOPODIACRffi, 600 



Fructification borne at the base of the leaves. UYDUOPTE1UDES, 002 



