NEW SPECIES OF MUSCI. 45 



Pulvinate, dusky green, hoary. Lower leaves smaller and 

 more patent. Setse semi-pellucid, shorter than the perichae- 

 tial leaves, curved. Capsules crisped when dry, but not 

 striated. Peristome of sixteen teeth reclining on the top ot 

 the columella, transversely barred, perforate, frequently bifid. 

 Calyptra entire or campanulate, divided at the base. It is 

 allied to G. calyptrata, Hook. (n. 60, Drummonds Muse. 

 Americ.), but has the capsules wider, and the margins of the 

 leaves plane, not recurved. 



2. G. cygnicolla ; caule caespitoso, erecto, ramoso ; foliis con- 

 fertis, subpatentibus, ovato-lanceolatis, pilo integerrimo 

 acuminatis, basi margine reflexis ; seta incurvata ; capsula 

 ovata, striata ; operculo conico-rostellato. — Swan River, 

 Mr. James Drummond. 



Pulvinate. Stems i an inch high, branched at the base. 

 Leaves olive-green, their margins plane above. Setae, when 

 moistened, so much incurved as partially to conceal the cap- 

 sules among the leaves. An annulus is present. Teeth of 

 the peristome more red and opaque at their bases, sometimes 

 bifid, and generally perforate. Our plant approaches Grimmia 

 orbicularis, Bruch, but has the capsule more round, the 

 beak of the lid shorter, the teeth of the peristome more 

 laciniated or perforated, the colour duskier, the leaves 

 narrower and recurved throughout the entire margin, 



Orthotrichum, Hoffman. 



1. O. elongatumi caule laxe caespitoso, elongato, adscendente, 

 ramoso, apice incrassato ; foliis imbricatis, recurvato-pa- 

 tentibus, lanceolatis, acuminatis, margine reflexis, substri- 

 atis, integerrimis ; capsula breviter pedicellata, elongate 

 ovali, laevi, calyptra pilosa. — On trees, near Quito, Prof. 

 William Jameson, 1845. 



Moncecious. Stems two inches long, annually proliferous 

 from their summits, which are subcapitate from their longer 

 and more crowded leaves. Pedicels, often two from the 

 same point of the stem, a little longer than the capsules. 



