Musci Exor;rict. 
BRYUM DEMISSUM. 
Bryum caule perbrevi ramoso, foliis ovatis euspidato-acu- 
minatis reticulatis, nervo excurrente, seta arcuata, cap- 
sula curvato-pyriformi pendula. (Tas. XCIX.) 
Meesia demissa. Hoppe et Hornsch. MSS. 
Timmie nov. sp. Schmidt MSS. 
Bryum curvulum. Schleicher MSS. 
Has. In monte Cenisii, supra 7000 pedum elevationem reperi- 
1814. Unicum parvulum cespitem in summo cacumine alpis 
Caules cespitosi ferrugineo-tomentosi, vix duas lineas longi, ad 
basin fastigiatim ramosi, sed, ut videtur, innovationibus pra- 
cipue. Folia flavo-viridia, basi purpurascente, arcte imbricata, 
erecta, concava, ovata, cuspidato-acuminata, margine integer- 
ima, nervo fusco, superioribus, in acumen piliforme excur- 
rente predita, reticulata areolis oblongis, grandiusculis. Seta 
semiuncialis, crassiuscula, flexuosa, superne insigniter arcuata. 
Capsula matura flavo-rufescens, oblongo-pyriformis, curvata, 
endula. Os minutum. Operculum conicum. Peristomii externt 
dentes 16 longiusculi, acuminati, transversim striati, albo- 
pellucidi, basi aurantiaca, int. cilia sepissime per paria ad 
apicem connexa, atque hic illic processubus transversalibus 
unita. Calyptram non vidi. 
1 first saw this singular moss in a botanical excursion made in 
the summer of 1814, near to one of the highest summits of Mont 
Cenis. It was soon after communicated to me by the late la- 
mented Professor Schmidt as a new Timmia. 1 have again re- 
ceived specimens from Prof,Hornschuch under the name of Meesia 
demissa, and from M. Schleicher under that of Bryum curvulum, 
It must be allowed, however, that in point of natural habit it has 
little or no connexion either with the Timmie or Meesie ; but 
that if the figure of the internal peristome is allowed of sufficient 
importance to characterize the genus, it must be arranged with 
the former. .To me its most natural place appears to be among 
some of our well known Brya. To B. cespititium it approxi- 
mates in its leaves, though they are of a laxer texture, and to 
B. Zierit in the form of its capsule. 
Fig. 1, tuft of plants, nat. size. Fig. 2, single plant. Fig. 3, 
leaf. Fig. 4, capsule. Fig.5, operculum. Fig.6, portion of outer 
peristome. Fig. 7, portion of inner ditto.—magn, 
