Musci Exortici1.—Browniani. 
DAWSONIA POLYTRICHOIDES. 
Gen. Guar. Perist. penicillatum, ciliis numerosissimis 
capillaribus rectis aqualibus e capsule parietibus co- 
lumellzeque ortis. Caps. hine plana, inde convexa. 
ypt. ext. e villis implexis, iv¢. apice scabra. Br. 
D. polytrichoides. Brown in Linn. Trans. v. 10. p.316. 
tab. 3. f-1. (Tas. CLXII.) z 
Han. Rips subumbrose rivulorum, ad radices montium, in vici- 
nitate Portus Jackson, Nove Hollandie. D. Brown 
Radix tomentosa. Caules 3—4-unciales, simplices, erecti, 
fiexuosi, basi nudiusculi, superne foliosi. Folia e basi dilatata, 
membranacea, fusca, lineari-subulata, supra plana, subtus 
convexa, patentia, siccitate erecto-appressa, fusco-viridia, mar- 
scabriuscula. Operculum conico-cylindraceum, basi incrassa- 
tum, apice lateris superioris mucrone subrecurvo. Peristo- 
minm penicillatum, densum, album, e margine capsule apice- 
que columelle ortum ; ciliis numerosissimis, capillaribus, pau- 
lulum flexuosis, inarticulatis. Columella angusta, corrugata. 
{ am happy to be able to figure this moss in the same number 
with the Lyedlia, they having many points in common, especi- 
ally the form of their capsules, although in the curious structure 
of the peristome and the shape of the operculum I know of 
nothing which resembles the Dawsonia. The male flowers I 
have never seen ; but Mr. Brown has figured them, and given a 
most elaborate plate and description of the whole plant in the 
tenth volume of the Linnean Transactions, 
rig. 1, 1, plants, nat. size. Fig. 2, leaf, Fig. 3, capsule 
when dry. Fig. 4, ditto in a moist state. Fig. 5, operculum. 
ig. 6, inner calyptra. Fig. 7, capsule cut open to show the 
columella and the insertion of the peristome. Fig. 8, cilia of the 
peristome.— magn 
