EXPLANATION OF THE PLATES. 155 



Fig. 7. Bkyum toequescens. 



Twisting Thread Moss (a) . 



Colour. Yellow green. 



Stems. Thickly tuftedj branched ; radiculose. 



Leaves (6) . Ovate ; set horn-wise (cuspidate) , very much twisted when dry ; 



lower leaves lanceolate. 

 Mowers and Fruit. Synoicous ; seta long ; capsule pendulous ; neck tapering into 



the seta. Summer. 

 Locality. Rocks and walls. 



Fig. 8. Betum obconicum. 



Ohcon/ical Thread Moss (a) . 



Colour. Dark green. 



Stems. Tufted^ branched. 



Leaves. Crowded, upper ones hair-pointed, ovate-acuminate, not twisted when 



dry. 

 Flowers and Fruit. Dioicous ; capsule pendulous, very long ; contracted in the 



middle. Summer. 

 Locality. Very rare. On walls, near Barnard Castle, Yorkshire. Mr. Spruce. 



Fig. 9. Betum capillare. 



Greater Matted Thread Moss [a] . 



Colour. Yellow green. 



Stems. Matted together, branched ; radiculose. 



Leaves (b) . Spreading, twisted when dry ; ovate-oblong ; bordered, upper 



leaves with a long poiat. 

 Flowers and Fruit. Dioicous; capsule reddish, pendulous; oblong pyriform. 

 Locality. Very common everywhere, on walls, rocks, &c. 



Variety. — Majus (Fig. 10 a, h) . Leaves broader, point shorter, border wider, 

 seta and capsule larger. Common. 

 The commonest and most variable of the species. 



