MR. W. mitten's list OF SAMOAN MOSSES. 181 



Hab 



^ »i^^.^»^ w** »t.v/i-4,v.o U.1J.U iv^\^iV3 111 funics 



of water is frequent (1-100 ft.). No. 45. 



M 



noecious; and there seems to be no difference between it and 

 those from Tutuila, excepting that the latter are greener, and, 

 when old, change to pale brown. 



This is the largest described species belonging to the group 

 named in Dr. C. MuUer's Synopsis, ii. p, 233, Vesicularia, there 

 made a section of his Omalia; but they do not present any con- 

 siderable difference from EctropotTiecium beyond the very lax 

 areolation, which at first sight might lead to their being supposed 



Sooke) 



LeucomiuM; gen. nov 



Caulis procumbens, parce yageque ramosus. Folia compressa, 

 diversiformia, enervia, laxissime elongate areolata, cellulis ala- 

 nbus carentibus. Theca parva. horizontalis, operculo longiros- 

 tro, calyptra angusta latere fissa, peristomio Stereodontis. 



L. DEBiLK, SulL Amer, ExpL Exp. t. 21 (Ilookeria). 



Sab 



No. 24. 



The soft, pale, almost white foliage of the species belonging to 

 this small genus gives the plants much the appearance of being di- 

 minutive allies to HooTceria lucens, Sm. ; but the calyptra is not 

 different from that found in mosses usually referred to Hypnum. 

 L, debile, like all its congeners, has a very lax areolation ; and 

 this, with the sparingly branched stems, which seem to be with- 

 out any creeping base, and adhere by a few rootlets either to de- 

 caying wood or leaves, renders it difficult to place them in any 

 known group of Hypnoid Mosses, or to avoid the conclusion that 

 they form a natural genus of themselves. 



Tkichosteleum, gen. nov. 



Caulis 



repens 



lax 



congestis pinnatus. Folia uniformia, enervia, cellulis plus 

 minus angustis ut plurimum papilliferis, alaribus conspicuis 

 coloratis, Pructus e ramis oriens. Theca in pedunculo elon- 

 gate gracillimo, minuta, ovalis, siccitate sub ore magno con- 

 tracta, demum pendula, ore hiante, operculo tenuiter rostrato, 

 peristomio Stereodontis, 



T. STIGMOSUM, sp. n, Monoicum, depresse csespitosum; folia pa- 

 tentia, elliptica, acuminata, acumine semitorto, concava, margine ser- 



