64 



Fiy. 150. 



ORGANOGRAPHY. 



Fig. 151. 



Fig. 152. 



Fig. 1.50. A species of mould {Mitcor), with mycelium below, from which 

 two stalks are seen to arise, each of which is terminated by a sac 

 {cystiiliian), from which a number of minute bodies (sj)ores) are escaping. 

 Fig. 151. Another mould (PeH(ci7?/«/»\ with mycelium and stalk bear- 

 ing several rows of cells, wliich are tiic germinating spores Fig. l.')2. 



Anotiier mould (Bofri/tis), with mycelium and stalk, which branches 

 above, and each ramification bears a rounded spore. 



Fig. 153. 



a plant into those adapted for vege- 

 tation, and those for reproduction, as 

 the smaller cells thus developed in the 

 interior of tlie larger ones are espe- 

 cially designed for reproducing the 

 plant, in the same manner as the seeds 

 of Flowering Plants are adapted for 

 that purpose. These reproductive 

 particles are termed spores or spo- 

 rulcs. 



In the plants above these we find 

 the cells combined in various ways, 

 so as to form flattened leaf- like expan- 

 sions (fig. 153), or solid axes, as well 

 as special organs of reproduction. 



Up to this i)oint, however, although 

 we liaA'c, as just noticed, certain cells 

 containing rcin'oductive particles, yet 

 we liave no examples of plants pre- 

 senting any distinct axis bearing 

 leaves. Sucli ])lants are therefore call- 

 ed ThalluphyUs or Tliallugens, that is 

 Fia.\7A. Thaiiu* of the com- phiiits fonucil of a ///r///MS, hccausc the 



mon Bladder Sea-weed ( /■■«<•«« i„.^„,. «.„,.„, ic .,i>,,li,.,l to sinv <'(>lliilflr 

 vcticuloxn.-). /. The Iructitlca- ''VttXil tClUl l.s ai)l>lKMl tO ailj CCllUiai 



tion. V. Bladders of air. fihimcntous or Hattcuctl leafy expan- 



sions, of whatever form, wliich have no axis or stem distinct 

 from a leaf, but the two combined as it were together, and per- 



