188 NEW MUSCI 
subulatis, integerrimis, margine recurvis, summis siccitate con- 
volutis, perichætialibus majoribus, erectis, adpressis; seta 
elongata; capsula cylindrica, hinc curvato-inclinata ; operculo 
longirostro. 
On Pichincha. Prof. W. Jameson. Feb., 1847. 
Stems about one inch high; shoots brownish, except at the 
very summits, where they are yellowish-green. Inferior leaves 
shorter and more distant, the upper larger and more recurved, but 
the highest or perichætial are erect, and closely invest the base of 
the pedicel. Peristome of sixteen pairs of filiform teeth. Pedi- 
cels a fine reddish-brown. Calyptra dimidiate. No male flowers 
observed. The curved capsules and slender points to the more 
subulate leaves separate this from Barbula fallar, Hedw. ; whilst 
the more considerable perichætia, and wider bases of the leaves 
keep it distinct from Barbula vinealis, Brid. 
Dipymopon, Hedw. 
1. D. calyptratus, Tayl. Caule cæspitoso, erecto, subsimplici ; 
folis laxe imbricatis, erecto-patentibus, incurvis, linearibus, 
acutis, siccitate tortis, integerrimis, basi margine inflexis; cap- 
sula tenella, cylindracea, operculo longirostro; calyptra lineari 
quam capsula duplo longiori, torta. 
On Pichincha. Prof. W. Jameson. Dec., 1846. 
Tufts scarcely one inch high, the younger parts glaucous-green. 
Capsule longitudinally wrinkled when dry, ovato-cylindrical, sub- 
plicate at the base. Columella shorter than the capsule. Calyptra 
lineari-subulate, spirally twisted. Peristome of sixteen short, fili- 
form teeth, each marked with an opaque line in the axis. No male 
flowers observed. The shoots have the habit of Weissia tenuirostris, 
Hook. et Tayl., (which some suppose to be a Didymodon,) but it 
is readily distinguished by its remarkably long and spirally twi 
calyptra. 
PorvrucnuM, L. 
1. P. Jamesoni, Tayl. Caule laxe cæspitoso, simplici, erecto, 
breviori; foliis erecto-patentibus, ex lata amplexante basi linea- 
ribus, acuminatis, denticulatis, nervo dilatato ; — bi 
