3U6 



I'LANT STUDIES 



of tlie capsule like a loose cap or hood, known as the 

 raJiijttvii ( Kij;'. 270, c), wliicli sooner or later falls off. As 



stated liefore, the ma- 

 ture structure devel- 

 oped from the oospore 

 is called a sporogoni- 

 um, a. form of sporo- 

 phyte peculiar to the 

 liryophytes. 



201. The sporogoni- 

 lun. — In its fullest de- 

 velojiment the sixirogo- 

 nium is diilerentiated 

 into tlie tliree regions, 

 foot, seta., and ca.])sule 

 (Fig. "''Ki); liut in some 

 forms the seta mav he 

 lacking, and in others 

 tlic foot also, the sjioi'o- 

 gonium in this last 

 case heing only the 

 capsule or spore case, 

 whicli, after all, is the 

 essential i)art of any 

 sporogonium. 



At first the ca])sule 

 is solid, and its cells 

 are all alike. Lati'r a, 

 gi-oup of cells within 

 hegins to ditfer in ap- 

 pea.raiice from those 

 aJ.)out them, heing set 

 «'"i!i'i:i- apai'l I'oi- the ]iroduc- 



tiun of spoi'cs. This 

 iiiitia,! griiup oi S|)ore-|ii'oducing cells is called the (irclic- 

 \/iiiriiiii), a woi'd niea.iiiiig "the iK'ginniug of spores." 



11111 if. /' K (ic\'cl()[j|im w illiiii 

 tlir vnitn- t/i. hi of an al rlH'L'nliiiiiil ; /;. C. 



tips ..r l,-.ify Kli s hcaiiliu ynlllii,^ spnM.. 



j^oiiia, piishiii^r lip calvi'lta (<■) anil ai"(lifi.'ii- 

 iiiiiiii link I// 1, ami sriiilhiu I, he I'ncil ilowi 

 ililn 111.' api-x uf Ihr LMimiiipliniT — Al'lil 



