162 BRITISH MOSSES. 



Flotvers and Fruit. Synoicous ; capsule on long seta ; ovate, horizontal; solitary. 



Spring. 

 Locality. Moist rocks. 



Fig. 7. Mnium hoknum. 

 Swan-neck Thread Moss (a) . 



Colour. Dark green. 



Stems. In patches, stems and shoots erect ; radiculose. 



Leaves (b) . Lower small, lanceolate, narrow; border broad, serratures double; 



nerve ceasing below the apex ; spinulose. 

 Flowers and Fruit. Dioicous ; barren flower, blackish and large ; seta very long, 



upper part like a swan's neck; capsule large, ovate, pendulous. Spring. 

 Locality. Barren sandy places. Common. 



Fig. 8. Mnium undulatum. 

 Palm-tree Moss (a) . 



Colour. Yellow green. 



Stems. Erect from a creeping rhizoma, two to three inches long, with arched 



innovations from near the summit. 

 Leaves (b) . Very large, waved ; decurrent, strap-shaped (ligulate) bordered, 



serrated. 



Flowers and Fruit. Dioicous ; capsules several together ; ovate, pendulous ; seta 

 orange. Spring. 



Locality. Shady places ; fruit rare. Abundant with fruit in Laneast Valley, 

 Cornwall. 



Perhaps this species is the most beautiful of Mosses. Its resemblance to a 

 palm-tree makes it impossible to confound it with any other kind. The resem- 

 blance is not merely external, for the structure of the woody stem is precisely that 

 of the date palm. With Climacium and Isothecium it may ultimately form a 

 distinct group of " Tree Mosses." 



