of Smith, of the Order Musci. 227 



Of this plant we have only one small specimen, but it is sufficient to 

 afford satisfactory characters for a very distinct species. In habit it 

 comes near to H. depressa, but differs in the peculiar form and structure 

 of its leaf, which, under the microscope, is extremely beautiful, with 

 delicate roundish reticulations. 



7. H. radicidosa, repens compressa subtus radicans supra 

 foliosa, foliis ovatis subacuminatis integerrimis immarginatis, 

 nervo ultra medium evanescente, capsula ovata nutante, oper- 

 culo rostro curvato, calyptra basi Integra. 



H. radiculosa, Hooker, Muse. Exot. t. 51. Humb. et Kunth. Syn. PK 

 v. i. p. 59. 



Hab. Moist shady banks, near Caripe, S. America> at an elevation of 

 2680 feet, Humboldt. Orinoco, Herb. Willd. Hornsch. in lift. 



*** Foliis binervibus. 



•J- Foliis integerrimis. 



8. H. pendula, ramis pinnatis curvatis compressis, foliis 

 undique imbricatis ovatis basi binervibus, capsula pendula, 

 operculo conico-rostrato, calyptra carnosa pilosa basi fim- 

 briata. 



H. pendula. Hooker, Muse. Exot. t. 53. Humb. et Kunth. Syn. 

 PL v. 1. p. 60. 



Hab. In temperate regions upon the mountains of the Andes. Hum* 

 boldt. 



A long straggling plant, with somewhat bipinnate compressed branches. 

 Its capsule is oblong-ovate, and drooping ; the calyptra laciniated at 

 the base, ' and hairy like that of many Orthotricha. The perichetial 

 leaves have a remarkably long acumination, and are slightly serrated. 



9- H. diaphana, ramis paucis laxissime foliosis, foliis pa- 

 tentibus oblique late obovatis attenuato-acuminatis immargi- 

 natis integerrimis laxissime reticulatis pellucidis nervis duo- 

 bus obscuris versus medium evanescentibus. 



Hypnum diaphanum. Swartz, Prod. p. 140. Fl. Ind. Occ. p. 1828. 

 Hedw. Sp. Muse. p. 243. t. 61. f. 1-6. (the magnified portions very in- 

 correct.) Schwaegr. Suppl. 2. p. 193. 



Pterygophyllum diaphanum. Brid. Meth. Muse. p. 150. 



Hab. Island of Jamaica. Swartz. 



This species is remarkable for having the leaves very thin and pellu- 

 cid. Their apex we find to be always twisted. The fruit of this plant 

 being unknown, it is from its general habit and the structure of its foli- 

 age that we are induced to place it in this genus. 



10. H. pallescens, ramis compressis, foliis undique imbrica- 



