88 HOOKERIA. 



rowed. The stems, as in most of the species, are covered 

 with thick, fuscous, downy roots. 



6. B. arcuata ; stems much elongated, proliferous ; leaves hori- 

 zontally patent, ovato-lanceolate, ^eliminated, serrated, 

 striated ; fruitstalks very short, arcuate, at length lateral ; 

 capsule smooth. (TAB. XXIII.) 



B. arcuata. Brld. Muse. vA.p. 139. JEngl Bot. 1. 1237- Turn. Muse. 

 Hib.p. 109. Schwaegr. Suppl. t. 62. Mnium arcuatum. Dicks. Plant.- 

 Crypt, fuse. 3. p. 2. t. 7-f-3. Hypnum chrysocomum. Dicks. Plant, 

 Crypt, fasc. 2. p. 12. Dill Muse. t. 39. f. 36. 



HAB. Mountains of England, Scotland, Wales, and Ire- 

 land. In the greatest abundance upon wet rocks at Low- 

 dore and Keswick. 



This extremely beautiful moss, unknown on the Conti- 

 nent of Europe, is rare in most' parts of England; yet 

 in the mountainous districts of Ireland is of very common 

 occurrence. It is readily enough known from all the rest of 

 the species by its perfectly globose, large, and smooth cap- 

 sules, by the greater flexibility of the steins, and rigidity of 

 "J- , the leaves, which never become twisted or curled by drying. 

 These leaves approach nearer to those of B. gracilis ; but 

 they are broader at the base, striated, and of a bright shi- 

 ning yellow-green colour. Schwaegrichen gives the Isle of 

 France, St. Domingo, and Jamaica as stations for this spe- 

 cies; the latter on the authority of Swartz's Mnium tomen- 

 tosum, which however we have ascertained to be a different 

 species, having long fruitstalks and capsules, the former up^ 

 right, the latter deeply sulcate. 



30. HOOKERIA (Smith, not Schwaegrichen). 



GEN. CHAR. Fruitstalks lateral ; Peristome double ; 

 the exterior of 16 teeth, the interior of a mem- 

 brane divided into 16 entire segments ; Calyptra 

 mitriform. (TAB. III.) 



The only two British individuals of this genus have a pecu- 

 liarity in their habit, in their plane surculi and bifarious succu- 

 lent leaves, which seem in themselves to point out a family dif- 

 ferent from Hypnum and Leskea^ with which they have been 



