Cephalozia. 15 



Jungermania laxifoUa Hook, recedes from Cephalozia in having lateral 

 branches, and in being (normally) quite destitute of radicles, the stems 

 rooting at the base by means of short naked flagella. The leaves are 

 complicato-bilobed, and there is no capitate involucre, the uppermost 

 leaves being alternate and often (but not constantly) rather remote from 

 the perianth.* Moreover, the perianths are very narrow at the mouth, 

 and almost closed — not from being plicato-constricted (as is frequent in 

 Cephalozia) but from the proper shape of the constituent valves. The 

 stem innovates repeatedly (sometimes bilaterally) from the base of suc- 

 cessive sterUe flowers. In most of these particulars, as well as in the 

 minute size and general habit, it agrees with Jung, myriocarpa Carr,, 

 along with which it sometimes grows on moist rocks. Both agree with 

 Cephalozia in the trigonous perianth, with the third angle undermost, 

 and in the monandrous male bracts. J. myriocarpa recedes from J. 

 laxifolia (whose large elongate leaf-cells resemble those of Cephalozia § 

 Alohiella) in the minute reticulation, the large complicato-equitant 

 bracts, and in the entire absence of underleaves, even from the $ flowers, 

 whereas in /. laxifolia they are everywhere present. These two speies 

 are therefore not very certainly congeners, although both (as it seems 

 to me) are distinct from Cephalozia; and it is with some diffidence I 

 venture to unite them under the generic name Hygeobiella. 



Anthelia Dum., certainly analogous (if not nearly related) to J. 

 laxifolia in the complicato-carinate tristichous leaves, differs essentially 

 in the radicellose stems ; in the dense polyphyllous involucres ; in the 

 perianth, which is truncate and 10-plicate at the mouth ; and in the in- 

 ferior calyptra strewn with sterile pistillidia. In the copious and sub- 

 pinnate ramification it agrees with Pleuroclada, whose leaves, however, 

 are not compHcate, and whose perianth, calyptra, &c., are conformable 

 to those of Cephalozia. 



Blephaeostoma, although at first sight so different from Cephalozia in 

 the quadripartite leaves, with filiform crura, has the involucre and 

 perianth formed on the same plan, the bracts being tristichous and 

 mostly trijugous, and the perianth when young distinctly trigonous 

 (with the third angle postical), although at maturity it becomes nearly 



*Hence Dumortier included it in his genus Gymnocolea, for a sketch of whose true 

 character and affinities see below under Cephalozia heterostipa. 



