BRYOPHYTA. 



f Mosses . .~] Plants contain- 

 | Liverworts. i ing chloro- 



Cellular plants usually showing a | ^ mute plants | phyll. 



differentiation into stem and j 

 leaves, and with a distinct alter- | 

 nation of generations, the t 

 oophyte constituting "the I 

 plant." 



PTERIDOPHYTA. 



"Plants showing a differentiation 

 into stem and leaves. Possess 

 true vascular bundles, and 

 with a distinct alternation of- 

 generations, the sporophyte con- 

 stituting the " plant." Chiefly 

 herbaceous. Only a few of the 

 Ferns attain the dimensions of 

 trees. 



often with no f- Chiefly terres- 

 | d i S e rentiation I trial. 

 i into stem and I 

 L leaves J 



f Ferns. Plants with relatively large 



leaves. Sporophylls are not 



aggregated into cones. 

 Horsetails. Plants with distinct 



nodes and internodes and small 



leaves in whorls. Peltate sporo- 



phylls aggregated into cone -like 



flowers. 

 Club-mosses. Plants with small 



scattered leaves. Sporophylls 



resemble foliage leaves, but are 

 sometimes aggregated into 

 cone -like flowers. 



PHANEROGAMS. Plants forming true seeds. 



GYMNOSPERMS. 



Ovules not enclosed in an 

 Trees and shrubs. 



ANGIOSPERMS. 



or 

 no 



fCycadaceae. " Sago Palms 

 Cycads. Flowers have 

 perianth and are usually cones. 

 Ccniferae. Freely branching trees 

 ovary. { and shrubs. Flowers cones with 



no perianth. 



Gnetaceae. Flowers are not cones 

 and have a rudimentary 

 ^ perianth. 



r Monocotyledons. Embryo with one 

 J cotyledon. 



Ovules enclosed in an ovary. ] Dicotyledons. Embryo with two 

 Trees, shrubs and herbs. L opposite cotyledons. 



L2 



