THE GREAT GROUPS OF BRYOPHYTES 



123 



^nid." This may 

 "intermediate" or 



105, D), which means a "cover" or 



serve to illustrate what is called an 



"transition" type, Sphagnum showing characters which 



ally it to Anthoceros forms on the one side, and to true 



Mosses on the other. 



A peculiar feature of the sporogonium is that it has no 

 long stalk-like seta, as have the true Mosses, although it 

 appears to have one. This false appearance arises from the 



B C /; a ^ 



Fig 105 Svhagmim : A, a leafy branch (gametophore) bearing four mature eporo- 

 gona; f archegorlium in whose venter a young embryo sporophyte (em) ,s de- 

 vdop in^' C, section of a young sporogonium (sporophyte), shown.g the b« bous 

 foX/) imbedded in the apex of the pseudopodium (;;.), the caps^xle U. he 

 cohmella (CO) capped by the dome-shaped archesporium (.;;(» a portion of the 

 ca vptra ica) and the old archegonium neck (aA); D, branch bcanng mature 

 po'rogonJum'and showing pseudopodium (;.), capsule (.•), and ^^^^^^^^ 

 antheridium discharging sperms; F, a single sperm, showmg coded body and i^^o 

 cilia.— After Schimpek. 



fact that the axis of the gametophore is prolonged above 

 its leafy portion, the prolongation resembling the seta of 

 an ordinary moss (Fig. 105, D). This prolongation is 



