1 62 



MUSCINE^ 



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 

 if<^W.-ir &s^^ segments. Neither archegones nor antherids 

 are elevated on receptacles, as in the Mar- 

 chantiacese. The antherids usually occur 



Fig. 136.— /"eWa epiphylla Car&., 

 male plant, a, natural size ; b^ 

 magnified. 



Fig. 137. — Radula compla- 

 nata Dum. Plant with 

 closed and open spoiange 

 (X 2). 



Fig. 138. — yungertnannia 

 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 



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

 Tarn arzsci Dum. f with true leaves and amphi- 

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

 ^ore magnified). 



Fig. 140. — Auricle of Frttllania, sp. 

 nified). (After Goebel.) 



(mag- 



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 thQ Jfen'cAcete, 



