Mosses and Lichens 



Pedicel. Long and pale, usually solitary. 



Lid (op ere ulum}. Acutely beaked. 



Annulus. Narrow, rolling back as the lid is pushed off. 



Teeth (peristome}. As in the genus. 



Spores. Mature in spring. 



Distribution. America, Europe, Asia. 



Mnium punctatum, variety elatum, Bruch & Schimp., 

 (See Plate XIX), has the stern taller, often 6 to 8 inches high, and 

 more branching and for this reason called elatum, the Latin for 

 "raised." 



Genus AULACOMNIUM, Schwaegr. 



The species of the Genus Aula- 

 comnium are erect, in dense cush- 

 ions on marshy ground or in cracks of 

 rocks. Some species will be easily 



..Sport-case 



Pelictl 



A. heterostichum. A. androgynum. 



Old spore-cases. 



A. androgynum. Plant with sterile 

 branches on the left and gemmae- 

 bearing branches on either side of 

 the sporophyte. 



A. androgynum. 

 Head of gemmae. 



recognised by their leafless branches termin- 

 ated by round clusters of loose granular bodies 

 (gemma). Each gemma is an aggregate of cells 

 and resembles the early stage in a developing 

 leaf. They fall to the ground and there develop 

 into new plants. 



The leaves are oblong or lance-shaped with 

 tiny projections on the cells. 

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