HYPNUM. 97 



capsule ovate, inclined; lid conical, acuminated. (TAB. 

 XXIV.) 



H. catenulatum. Schiuaegr. Suppl. p. 218. Pterigynandrum cate- 

 nulatum. Brid. Muse. p. 64. t. b.f. 4. Grimmia catenulata. Mohr. 



HAB Wet rocks at the Dargle, and at Powerscourt, near 

 Dublin, abundant. 



We think we are perfectly right in considering this plant, 

 which we have seen in various collections, and which we 

 suspect to be figured in English Botany || for Pterogonlum 

 j6///orwe,- to be the true H. catenulatum of Schwaegri- 

 chen. This is truly a Hypnum, having a single filiform pro- 

 cess between the segments of the inner peristome, as 

 Wahlenberg has represented in his H. momliforme. The 

 stems are closely tufted, from one to two inches in length, 

 rigid; leaves rather distant, of a dark green colour, their 

 margins appearing as it were serrated from the papillose 

 surface. In our specimens the nerve is short, not more 

 than one fourth of the length of the leaf, whilst in the 

 H. catenulatum of Schwaegrichen it is said to disappear 

 beyond the middle, the only difference we can discover. 



15. H. stramineum ; leaves loosely imbricated, erecto-patent, 

 oblongo-ovate, obtuse, entire; their nerve reaching half way; 

 capsule oblongo- ovate, curved, cernuous; lid conical. (TAB. 

 XXIV.) 



H, stramineum. Dicks. PL Crypt, fasc. 1. t. I./. 9. Turn. Muse. 

 Hlb. p. 164. Engl. Bot. t. 2405. Schwaegr. Suppl t. 89. (var. j3.) 



HAB. Banks and wet bogs, generally mixed with other 

 mosses. 



The slender habit, pale colour and obtuse leaves are 

 striking characters in this species. It is incorrectly de- 

 scribed in Fl. Brit, and in Engl. Bot. as having the leaves 

 destitute of a nerve. Schwaegrichen's var. /3., above quoted, 

 seems just intermediate between our plant and H. molle ; 

 but the nerve of the leaf is rather that of stramineum. The 

 fructification is rare. We find it in that state near Dublin, 

 in July, with the lower part of the fruitstalks buried two 

 inches in a firm sand bank, so that it is scarcely possible to 

 secure good specimens. 



6. H.murale; leaves nearly erect, imbricated, oval, with a very 

 short point, concave, entire, nerve reaching about half way 

 up ; capsule ovate, cernuous ; lid rostrate. (TAB. XXIV.) 



Jj We mean the specimens received from Mr. Mackay. 

 H 



