CATALOGUE. 347 



AULACOMNION PALUSTKE, ScllWSeg. 



Hab. — Twin Lakes, on bogs ; very common. 

 Philonotis marchica, Brid. 

 Hab. — Twin Lakes, in springy places. 

 Philonotis fontana, (Linn.) Brid. 



Hab. — Twin Lakes, Mount Graham, Arizona, side of brooks. 

 Philonotis fontana, var. gracilis. 

 Hab. — Mount Graham, Arizona; springy localities. 

 Philonotis calcarea, Brch. & Sch. 



Hab. — Twin Lakes and Santa F6 Creek, New Mexico, by the side of 

 small streams. 



Timmia megapolitana, Hedw. 



Hab. — Twin Lakes, on shaded rocky ground. 



POLYTRICHUM JUNIPERINUM, Hedw. 



Hab. — Twin Lakes, on moist ground. 



Myurella julacea, Brch. & Sch.- — Densely tufted ; stems very 

 slender, filiform, fragile. Leaves pale, glossy green, yellowish when old, 

 closely imbricated, very concave, roundish-ovate, obtuse, nerveless, 

 obscurely serrate at the apex, denticulate towards the base ; areolatioii 

 roundish ; capsule suberect, oval oblong, tapering below, of a reddish- 

 brown ; peristome white ; operculum conical. 



Hab. — Twin Lakes, on wet banks ; not common in a fruiting condition. 



Pseudoleskea atrovirens, Dicks. — In loose patches, dioicous ; stem 

 prostrate, irregularly branched, incurved, slender, filiform ; leaves imbri- 

 cated, seeund, ovate-lanceolate, acuminate, subserrulate; margin recurved; 

 nerve thick, sub-continuous ; areolae small, oval. 



Hab. — Twin Lakes, among other mosses on trees. 



Thuidium Blandowii, Web. & Moh. 



Hab. — Twin Lakes, in meadows. 



Elodium paludosum, Sulliv. 



Hab. — Twin Lakes, in wet and boggy stations. 



Climactum dendroides ?, Web. 



Hab. — Twin Lakes, in bogs and wel places; sterile 



Bkachythecium salebrosum, Hoffm. 



