CRYPTOGAMIA MtJSCI. 45 



20. TORTULA. 



* Leaves with hair-like points. 



1. T. muralis, stems short, simple; leaves linear-oblong, patent, 

 pointed with a smooth hair ; capsule cylindraceous ; lid conical, 

 acuminate. 



Hob. On walls and stones in roundish tufts. Winter. 



2. T. ruraliS) stems elongated, branched ; leaves ovate, oblong, 

 keeled, recurved, pointed with a serrulate hair, upper ones stel- 

 late ; capsule ovate-cylindraceous ; lid subulate ; teeth of the 

 fringe united below into a tube. 



Hob. On old thatched roofs, and on the sandy sea-shore 

 from Spittal southwards* Spring. 



When on roofs, this moss grows in large cushion-like tufts, 

 but in extensive even patches of a bright yellowish-green 

 colour on our links, where, however, it never produces 

 any fruit. 



* * Leaves without hair-like points. 



3. T. subulata, stems very short ; leaves large, oblong-lanceo- 

 late, apiculate ; capsule cylindrical, long, slightly curved ; lid 

 subulate. 



Hob. On banks and earthen dikes, in bright green patches 

 or tufts, common. Spring. 



4. T. unguiculata, stems branched ; leaves lanceolate, obtuse, 

 mucronate, the margins nearly plane ; capsule oblong ; lid ros- 

 trate, nearly as long as the capsule. 



Hob. On stone and earth walls, in brownish tufts, com- 

 mon. Spring. 



5. T. fallaX) stems elongated, branched ; leaves lanceolate-sub- 

 ulate, patent or recurved, their margins reflexed; capsule oblong; 

 lid rostrate, nearly as long as the capsule. 



Hob. On moist clay banks. 



6. T. revoluta, stems diffusely branched ; leaves straight, lan- 

 ceolate, acuminate, with revolute margins, perichsetial ones nerve- 

 less, convolute ; capsule ovate, with a short conical lid T. ner- 



SM. Comp. 171- 

 Hob. On banks, rare. Banks above Newmills* Spring* 



