ACOTYLEDONS. MUSCI. HypilWU. 141 



1. H. Z/zcew.?, leaves broadly ovate entire obtuse nerveless. Muse. 



Brit. p. 8!). t. 27. Hypmim lucens. Light/, p. 743. 

 Hab. Moist banks in woods and among rocks. 

 Leaves with very large cellules. Capsule horizontally inclined, dark 



purple brown, reticulated. Cahjptra pitted, almost white. 



30. HYPNUM. 



Fmitslalks lateral. Peristome double; the ext. of 16 teeth; 

 the interior of a membrane cut into 16 equal segments, with 

 filiform processes frequently placed between them. Calyptra 

 dimidiate. Muse. Brit. p. 91. /.3. 



Div. I. Stems {taken in conjunction with the leaves) plane. 

 Sect. I. Capsules erect. 



1. H. trichomanoides^ leaves broadly scymetar-shaped serrated 

 at the point, nerve reaching to the middle of the leaf, capsule 

 ovate erect, lid rostrate. Muse. Brit. p. 91. /. 24. 



Hab. Trunks of trees, not rare. 



2. H. complanatum, leaves oblong apiculate entire nerveless, 

 capsule ovate erect, lid rostrate. Muse. Brit. p. 9\. t. 24. 

 Light/, p. 742. 



Hab. Trunks of trees, common. 



These two species have the habit of Neckera. 



Sect. 11. Capsules cernuous or inclined. 



S. H. riparium, leaves ovato-lanceolate acuminated entire the 

 nerve reaching nearly to the summit, capsules oblong cernuous, 

 lid conical. ^Miisc. Brit. p. 92. t. 24. Light/ p. 760. 



Hab. Banks of rivers and lakes, and spots occasionally overflowed 

 with water. 



4. H. undulatum, leaves ovate acute transversely undulated, with 

 2 faint nerves at the base, capsule oblong furrowed arcuato- 

 cernuous, lid rostrate. Ahisc. Brit. p. 92. it. 24. Light/, 

 p. 744. 



Hab. Woods and dry heathy places. Plentiful in the Highlands. 



5. H. denticulatum, leaves ovate sonietimes approaching to lan- 

 ceolate more or less acuminated having 2 short nerves at the 

 base, capsule oblongo-cylindraceous inclined, lid conical. 

 Muse. Brit. p. 92. t. 24. Light/ p. 74 1 . 



a. angusti/oliuni, leaves ovato-lanceolate distant quite plane. 



H. denticulatum, Linn. 

 /3. ohtusi/olium, leaves ovate more or less obtuse slightly concave. 



H. Doniannm, E. B. 

 Hab. Principally in woods. j3. Among the mountains, G. and D. Don. 



Cairn-gorum, Mr. Winch. 



