[fi/pnum. i 



MUSCI. 45 



Woods at Killarney ; and at Dunkerron, County of Kerry. 



47. H. squarrosum, Linn. Leaves squarrose, widely cor- 

 date, very much acuminated, recurved, serrated, shortly 

 2-nervcd ; capsule ovato-globose, cernuous ; lid conical. Linn. 

 sp. pi. p. 1593. Muse. Brit, ed.2, p. 182, t. 26. 



Woods and heaths ; common. 



2. Leaves secund. 

 A. Leaves with a single nerve. 



48. H. filicinum, Linn. Branches pinnate ; leaves especially 

 the upper falcato-secund, broadly ovate, acuminate, serrated, 

 their nerve percurrent ; capsule oblongo-ovate, curved, cer- 

 nuous ; lid conical. Linn. sp. pi. p. 1590. Muse. Brit. ed. 2, 

 p. 183, t. 26. 



On moist banks and wet sides of rivulets ; common. A variety at 

 Blackwater bridge has the leaves scarcely serrulated. 



49. H.palustre, Linn. Leaves secund, ovate, somewhat acumi- 

 nate, concave, entire, their margins incurved above, their nerve 

 short, sometimes forked ; capsule oblongo-ovate, cernuous ; lid 

 conical. Linn, sp.pl. p. 1593. Muse. Brit. ed. 2, p. 185, t. 26. 



On wet rocks in streams ; common. Varies by the direction and 

 acumination of the leaves, by their colour, by the length of their 

 nerve, by the degree of incurvation of the capsule, by the length of 

 the lid, by a slight roughness of the setts, and by the length and 

 colour of the shoots. 



50. H. Jluitans, Linn. Leaves loosely imbricated, the up- 

 per falcato-secund, lanceolato-subulate, subserrulate, their 

 nerve not quite percurrent ; capsule ovato-oblong, curved, cer- 

 nuous ; lid conical. Linn. Fl. Suec. ed. 2, p. 399. Muse. Brit, 

 ed. 2, p. 185, t. 24. 



In pools of clean water ; not uncommon ; fruit rare. 



51. H. aduncum, Linn. Leaves falcato-secund, lanceolato- 

 subulate, concave, entire, their nerve not quite percurrent ; cap- 

 sule oblongo-ovate, curved, cernuous ; lid conical. Linn, sp.pl. 

 p. 1592. Muse. Brit. ed. 2, p. 186, t. 26. 



On bogs ; common. The leaves are sometimes ovato-lanceolate, 

 less secund, and somewhat rugose ; and again, when of a purplish red 

 colour, very narrow, long and much falcate ; this variety has been called 

 H. revolvens by authors. 



52. H. uncinatum, Hedw. Leaves falcato-secund, lanceolato- 

 subulate, serrated, striated, their nerve not quite percurrent ; 

 capsule cylindrical, curved, cernuous ; lid conical. Hedw. St. 

 Cr. v. 4, t. 5. Muse. Brit. ed. 2, p. 187, t. 26. 



On stones at the side of Lough Bray, near Dublin ; very rare. 



53. H. commutatum, Hedw. Stems pinnated; leaves falcato- 

 secund cordate elongato-acuminate, serrated, their margins re- 

 flexed, their nerve not quite percurrent capsule oblong, curved, 



