124 D I P L O P E R I S T O M I. [ Orthotrichum. 



about as long as the stems ; capsule ovate, erect, having a slight 

 apophysis at the base, longitudinally striated. Lid rostrate* 

 JPeristome double; the outer consisting of 16 short, obtuse 

 teeth approaching in pairs, which at length become recurved ; 

 inner, of as many alternating ciliae lying horizontally over the 

 mouth of the capsule. 



Schwaegrichen at one time united this moss with Brywn 

 androgynum, and formed of them a new genus, Gymnocephalus, 

 from the naked male flowers which he supposed this to possess ; 

 an error into which he would not have fallen if he had known 

 the present plant. 



Since the publication of our former edition, this species has 

 appeared in two Continental publications, under the names of 

 Gagea compacta, and Amphidium pulvinatum. Both these 

 plants, of which we possess authentic specimens, appear to dif- 

 fer at first sight from ours in the darker green, more succulent, 

 broader and more obovate, obtuse leaves. But we find different 

 specimens to vary even in these respects, and we are of opinion 

 that no specific distinction exists between them. Our plants 

 from the Isle of France, and from Dusky Bay, New Zealand, 

 (gathered by Mr. Menzies,) accord in every particular, as far 

 as we have been able to observe, except in their somewhat 

 larger size; but in the specimens from New Zealand Dr. 

 Schwaegrichen has observed 16 ciliae, and hence has referred 

 them to a new genus Codonoblepharum. 



XXV. ORTHOTRICHUM. 



GEN. CHAR. Fruitstalks terminal ; Peristome mostly double ; 

 the exterior of 16 teeth approaching in pairs ; 'the inner of 

 as many ciliary processes lying horizontally ; Calyptra 

 mitriform, sulcate, more or less hairy. (TAB. II.) 



Three of the species of this genus, viz. O. cupulatum, O. ano- 

 malunij and O. Drummondii have no ciliary processes. O. 

 striatum has them of a peculiar shape, and of a beaded ap- 



