38 MOSCT. [Hypnum. 



B. Capsules inclined, or cernuous. 



3. H. riparium, Linn. Leaves ovato-lanceolate, acuminated, 

 entire, their nerve not quite percurrent ; capsule oblong, cer- 

 nuous ; lid conical. Linn. sp. pi. p. 1595. Muse. Brit. ed. 2, p. 

 152, t. 24. 



On stones occasionally inundated. 



4. H. undulatum, Linn. Leaves ovate, acute, transversely 

 undulate, with two short nerves ; capsule oblong, furrowed, 

 arcuato-cernuous ; lid rostrate. Linn. sp. pi. p. 1589. Muse. 

 Brit. cd. 2, p. 13, t. 24. 



In woods ; not uncommon. The very pale, almost white colour of 

 the shoots, and furrowed capsule, remove this in habit from all the 

 other British species. 



5. H. denticulaium, Linn. Leaves ovate or ovato-lanceolate, 

 subacuminated, with 2 short nerves; capsule oblongo-cylin- 

 draceous, inclined; lid conical. Linn. sp. pi. p. 1588. Muse. 

 Brit. ed. 2, p. 153, t. 24. 



In woods ; not uncommon. 



II. Shoots cylindrical. 



1. Leaves pointing in all directions (not secund.) 



A. Leaves uniform in their direction, (not squarrose.) 



a. Nerve percurrent or excurrent. 



* Leaves entire. 



6. H. medium, Dickson. Leaves ovate, obtuse, concave, en- 

 tire, slightly secund, their nerve percurrent ; capsule cylin- 

 draceous, nearly erect; lid conical. Dicks. Cr. Fuse. 2, p. 12. 

 Muse. Brit. ed. 2, p. 154, t. 124. 



On trees, in moist situations ; not common. The margins of the 

 leaves are recurved ; the seta is smooth. 



7. H. tenellum, Dicks. Leaves fasciculated, lanceolato- 

 subulate ; erect, entire, their nerve percurrent; capsule ovate, 

 cernuous; lid rostrate. Dicks. Cr. Fasc. 4, t. 11, /. 12. Muse. 

 Brit. ed. 2, p. 155, t. 24. 



On limestone, or on mortar ; not uncommon. 



8. H. serpens, Linn. Leaves ovato-lanceolate, somewhat 

 obtuse, patent, entire, their nerve percurrent, capsule cylin- 

 draceous, cernuous; lid conical. Linn, sp.pl. p. 1596. Muse. 

 Brit. ed. I, p. 155, t. 24 (not of Funcke No. 49). 



S). H. Jluviatile, Swartz. Leaves ovato-acuminate, nearly 

 erect, their nerve quite percurrent, entire, their margins reflexed ; 

 capsule cylindraceous, arcuato-cernuous ; lid convex, acuminu- 

 late. Swartz. Muse. Suec. p. 68. Web. et Mohr. Bot. Tasch. 

 p. 203. Hedw. Sp. Muse. p. 277, t. 81, /. 4. 



On rocks in the iiver at Ballinhassig-, near Cork. Stems pro- 



