l62 



MUSCINE.E 



appear on the dorsal surface of the shoot, at some distance from the 

 apex ; while in the acrogynous forms they are formed in close proximity to 

 the apical cell. In Radula (Dum.) the entire female inflorescence, com- 

 posed of a number of archegones enclosed in 

 a perigyne, is developed from the apical cell 

 of a shoot, and from its youngest three 

 segments. Neither archegones nor antherids 

 are elevated on receptacles, as in the Mar- 

 chantiaceae. The antherids usually occur 



Fig. 136. — Pellia- epiphylla Cord., 

 male plant, a, natural size ; b, 

 magnified. 



Fig. 137. — Radjila coijzpla- 

 nata Dum. Plant with 

 closed and open sporange 

 (X 2). 



Fig. 138. — Jtingermnnnia 

 barbata Schreb. Under 

 side of leaves with ciliated 

 amphigasters (magnified). 



singly or in groups in the axils of the leaves. In Pellia (Radd.) the an- 

 therids are imbedded in the thallus, the archegones appearing in large 

 numbers at the apex of the shoot. In the Geocalycese {e.g. Calypogeia, 

 Radd.) the female branches are so hollowed out that the archegones are 



ir. 



Fig. 139. — I. Under side of stem of Fncliania 

 Tajuarisci Dum., with true leaves and amphi- 

 gasters (magnified). II. Leaf of F. dilatata 

 (more magnified). 



Fig. 140. — Auricle of Frnllauia. sp. (mag- 

 nified). (After Goebel.) 



sunk in a deep pitcher-shaped hollow or tube, within which the spo- 

 rogone is subsequently formed. In other genera they are concealed by 

 the nearest leaves. The modified leaves which thus enclose a group of 

 archegones, or of both archegones and antherids, constitute the perichcete., 



