230 Dr. Hooker and Dr. Greville on the Genus Hookeria 



Leskea undata. Hedw. Sp. Muse. p. 214. t. 52. Schwaegr. Suppl. 

 II. 165. 



Hypnum Guadalupense, Schwaegr. Suppl. II. p. 189. 



Pterygophyllum undatum, Brid. Meth. Muse. p. 149. 



Hab. Jamaica, communicated to Hedwigby Swartz. 



As far as we can judge from the descriptions given by Bridel and 

 Schwaegrichen of Hypnum Guadalupense, that plant does not differ from 

 the present individual ; an opinion in which we are supported by Mr. 

 Arnott. 



17. H. laetevirens, complanata vage pinnatim ramosa, foliis 

 "bifariis ovatis acuminulatis marginatis apice subserrulatis 

 usque ad apicem fere binervibus, capsuia ovata horizontal!, 

 operculo conico-rostrato, calyptra integra. 



H. laetevirens, Hooker and Tayl. Muse. Brit. p. 89. t. 27. 



Hab. In a bog near Cork, Ireland, Mr. Drummond. 



An exceedingly beautiful species, of a full bright shining green colour, 

 two inches or more in length. The capsule and calyptra are very simi- 

 lar to those of H. lucens and acutifulia. It has never been found in any 

 station except the one above given. 



18. H. Langsdorfii, elongata ramosa, foliis distiehis com- 

 pressis ovatis subacuminatis apice serratis, nervis duobus ante 

 apicem evanescentibus, capsuia ovata nutante, operculo he- 

 misphaerico rostrato, calyptra basi sexfida. 



H. Langsdorfii. Hooker, Muse. Exot. t. 121. 



Hab. Near Rio Janeiro, Langsdorff"; communicated by Mr. Swain- 

 son. 



A fine species, nearly five inches in length, and resembling in its ge- 

 neral habit both H. albicans and H. Iwtevirens. 



19. H. albicans, ramis complanatis, foliis bifariis ovatis 

 apiculatis sumrartate serratis pellucidis laxe reticularis nervis 

 duobus divergentibus infra apicem evanescentibus, capsuia 

 nutante ovata, operculo acuminato, calyptra basi laciniata. 



Leskea albicans, Hedwig, Sp. Muse. p. 218. t. 54. f. 13 — 16. Schwaegr. 

 Suppl. II. p. 162. Swartz- Fl. Ind. Occ. p. 1811. 



Hypnum albicans, Swartz, Prod. p. 140. 



Racopilum Aubertii. Pal. de Beauv. iEtheog. Prodr. p. 37. 



Pterygophyllum albicans, Brid. Meth. Muse. p. 150. 



Hab. Jamaica, Swartz. St. Vincent's, Rev. L. Guilding. 



In general appearance this comes near to H. laetevirens, but its leaves 

 have a much more lax reticulation, and are very pellucid ; the capsule, 

 moreover, is not horizontal, nor its calyptra entire. 



Bridel, under P. albicans, quotes Neckera Aubertii of his Sp. Musco- 



