ME. W. MITTEif's LIST OF SAUOAK MOSSES. 179 



000 



Motley 



hopodon) 



m the leaves having to their apices a distinct narrow pellucid 



lami 



ina. 



O. PAPILLOSUM, sp.n. Huniilis; folia a basi erecta, oblonga, cellulis 

 rhombeis quadratisque areolata, angustata, linearia, obtusciuscula, pa- 

 tentia, nervo crasso in parte patente papillis elongatis setula^formibus 

 obteeto, lamina folii usque ad apicem continuata e seriebus singulis 

 binisve cellularum quadratarum hyalinarum composita, limbo incras- 

 sato dense papilloso-serrulato marginata. 



Hub, in Java^ ex herb. Nees v, Esenbeck, 



This differs from O. Blumei in the same respect as 0. his* 

 pidulum, 



lu O. Blumei, which has been placed by C. Miiller, Syn. ii. 

 P- 537, in Leucophanes, the leaves above the base are entirely oc- 

 cupied by the plano-convex nerve, and thus differ from those 

 of Leucopltanes candidum, Hornsch. {SyrrJtopodon)^ which have 

 the nerve flattened ; and it is scarcely observable, except on 

 cross section, that the leaf is really composed of dilated nerve 

 two cells thick, with a narrow obscure thread running through 

 the middle. 



r 



O. RECURVUM, sp. n. Caulis elongatus, densifolius; folia a basi erecta, 

 ovali, convoluta, sensim angustata, patentia recurvaque, subcomplicata, 

 apice denticulata, nervo excurrente dorso subsemilato, limbo angus- 

 tissimo in parte folii erectiore latiore marginata; pericliaetialia erecta, 

 angustiora; theca in peduuculo gracili rubro, ovali-cylindracea, fusca, - 

 vernicosa. 

 Hab. Upolu, on trees. No. 104. 



Similar to O. d&txsifolium^ Mitten {LeucopTianes) , from the Figi 

 Islands, but with leaves more narrowed above, the lower leaves 

 »iore recurved, very white, those towards the apices of the stems 

 Biightly tinged with very pale green or brown. 



Not\\ithstanding the remarks in C. Miiller, Syn. i. p. 86, where, 

 and m p. 85, Arthrocormus Scliimperi is stated to have nerveless 

 leaves, and the opposite opinion held by Bridel and Dozy et 

 Molkenboer is considered erroneous, an examination of the spe- 

 cies referred to the genera Octoblepharum and Leiicophanes can 

 ^iily lead to the conclusion that the whole of the upper portion 

 of the leaf of O. albidum is a dilated nerve, thickened with five or 

 SIX layers of cells, that of Leucoplanes ocioblepharoidcs differing 



only in being but two layers of cells in thickness. 



