92 H Y P N U M. 



2. Capsules cernuous or inclined. 



3. H. riparmm ; leaves ovato-lanceolate, acuminated, entire, i 



the nerve reaching nearly to ihe summit | capsules oblong, j 

 cernuous ; lid conical. (TAB. XXIV.) 



H. riparium. Linn. Sp. PL p. 1595. Hedw. St. Cr. v. 4. t. 3. Turn. \ 

 Muse. Hib. p. 152. Engl Bot. t. 2060. Dill Muse. t. 40. /. 44. B. i 

 C. D. 



HAB. Banks of rivers, and in spots occasionally over- j 

 flowed. 



Stems from four to six inches in length. Colour, dirty 

 yellow-green. 



4. H.undulatum'y leaves ovate, acute, transversely undulated, 



with two faint nerves at the base ; capsule oblong, furrowed, 

 arcuato-cernuous ; lid rostrate. (TAB. XXIV.) 



H. undulatum. Linn. Sp. PI. p. 1589. Turn. Muse. Hib. p. 154. 

 Etigl Bot. #.1181. Moug. et Nsstl. n. 45. Dill. Muse. t. 36. f. 11. < 



HAB. In woods and dry heathy places. 



This fine species, which is often four or five inches in. 

 length, differs most strikingly from the rest of the genus by 

 its peculiar habit, its white membranaceous and undulated 

 leaves; and still more remarkably from all its British con- 

 geners by its furrowed capsules, giving it the same relation 

 * with the' Uypna as Mnium bears to Bryum 5 and it might 

 with equal propriety be separated. 



5. H. denticulatum ; leaves ovate, sometimes approaching to, 



lanceolate, more or less acuminated, having two short nerves 

 at the base ; capsule oblongo- cylindraceous, inclined ; lid 

 conical. (TAB. XXIV.) 



. angustifolium ; leaves ovato-lanceolate, distant, quite plane, 

 H. denticulatum. Linn. Sp. PL p. 1588. Hedw. St. Cr. v. 4. t. 3^ 

 Turn. Muse. Hib. p. 148. 1. 12. f. 1. Engl. Bot. 1. 1260. Moug. et Nestl. 

 n . 46. Dill Muse. t. 34. /. 5/6. 



/3. obtusifolium j leaves ovate, more or less obtu&e, slightly concave, 

 H. denticulatum. 0. obtusifolium. Turn. Muse. Hib. p. 146. t. 12./.2. 

 H. obtusatum. Wahl. Fl. Lapp. p. 371. H. Donnianum. Engl. Bot. 

 1. 1446. 



HAB. Principally in woods. /3. among the mountains. 



This species varies extremely in size, somewhat in colour, 

 and greatly in the figure and even in the texture of the 

 leaves. In our a, the most common state of the plant, the 

 leaves are almost exactly distichous, horizontal, narrow and 

 acuminate, so distant as to resemble teeth set along the 

 stem, and better agreeing with the Dillenian figures than 

 with those of Hedwig, which perhaps more properly belong 

 to our /3. In this the leaves are broader, more concave an<j 



