78 PLANT LIFE. 



Or again, the division may be based on the fundamental 

 parts, as follows — 



Cellular plants include those not furnished with fibro- 

 vascular bundles, e. g. Alga, Fungi, and Muscinem. 



Vascular plants ; furnished with fibro-vascular bundles in 

 addition to cellular or fundamental tissue, e. g. all plants not 

 included in the first subdivision. 



The following arrangement will be followed in the present 

 work — 



Subdivision L Mycetozoa. Saprophytes. During the 

 vegetative phase consisting of a motile plasmodium formed 

 by the coalescence of numerous zoospores. During the 

 reproductive stage the Plasmodium becomes differentiated 

 into spores contained within a sporangium, rarely borne on 

 the surface of a sporophore and uncovered. 



Subdivision II. Thallopliyta. Plants with or without 

 chlorophyll, without any differentiation into stem and leaves, 

 true roots and fibro-vascular bundles absent, alternation of 

 generations not distinctly marked. 

 Class I. Alga. 

 „ II. Fungi. 



Subdivision III. Muscinese. True roots and fibro-vascular 

 bundles absent. Alternation of generations becoming 

 distinctly marked in the higher forms, the sexual generation 

 with a distinct stem bearing leaves, the oophore giving 

 origin to the asexual generation, which consists of a sporan- 

 gium containing spores. 

 Class III. Hepatica. 

 „ IV. Musci. 



Subdivision IV. Pteridophyta. Alternation of generations 

 distinct, disappearing in the higher forms. Fibro-vascular 

 bundles, stem bearing leaves, and true roots present in the 

 asexual or spore-bearing generation. Sexual generation a 

 small prothallus. 



