Beown. — On the Genus Orthotrickura. 433 



18. Orthotrichum longithecum, sp. nov. 



Plants monoecious, yellowish-green, growing in dense pul- 

 vinate tufts, sometimes large, £in.— fin. high, branched by 

 innovations. Branches closely aggregated, short, fastigiate.' 

 Leaves closely imbricating ; lower spreading ; upper nearly 

 erect ; lower ones ovate-lanceolate, obtuse, very concave ; 

 middle and upper leaves nearly similar in their outline ; upper 

 ones largest, oblong-lanceolate obtuse, semi-convolute ; apex 

 slightly cucullate. Margins entire, recurved from near the 

 base to above the middle nerve, ending below the apex. 

 Areola : Upper punctiform, lower oblong. Leaves when dry 

 erect and adpressed. Perichcetial leaves about the size of the 

 upper ones, oblong-lanceolate, acute, erect, semi-convolute. 

 Margins plain, entire. Nerve ending below the apex. Fruit- 

 stalk erect, ^in. Capsule long, narrow oblong, or cylindric. 

 Peristome double : outer 8 bigeminate, entire, or minutely 

 perforated on the middle line ; inner 8 cilia alternating with 

 the outer, consisting of one row of very narrow cells half the 

 length of the outer. Operculum straight, conico-rostrate, 

 about one-quarter the length of the capsule. Calyptra shorter 

 than the capsule, mitriform, plicate, pilose. Male inflorescence 

 gemmaceous in the axil of a leaf below the perichsetium. 



Hab. Rocks, Mount Torlesse ; January, 1885. Palmer's 

 Pass, at the head of the River Courtney; February, 1894. 

 Collected in both localities by R. B. 



19. Orthotrichum anomalum, sp. nov. 



Plants monoecious, brownish-green, growing in loose tufts 

 fin. high, branched by innovations. Branches stout, spread- 

 ing, T X g-in.-iin. long, fastigiate. Leaves closely imbricating, 

 erecto-patent ; lower ones ovate-lanceolate, tapering into an 

 acuminate point ; middle and upper similar in their outline, 

 upper longest, oblong-lanceolate, tapering into an acuminate 

 point sheathing at the base, very concave. Margins entire, 

 recurved from the base to about the middle, papillose. Nerve 

 ending below the apex. Areola : Upper punctiform, lower 

 oblong-quadrate. Leaves when dry slightly twisted, sub- - 

 erect. Perichcetial leaves shorter than the upper ones, erect, 

 ovate-lanceolate, tapering sharply into an acuminate point, 

 concave. Margins plain; entire. Nerve ending below the 

 apex. Fruitstalk T 3 gi n - long. Capsule long, oblong-pyri-' 

 form, tapering into the fruitstalk. Peristome double : outer 

 8 bigeminate, entire ; inner 8 cilia alternating with the outer, 

 and consisting of two rows of cells, tapering from a broad 

 base to a point. Operculum mammillate, small. Calyptra 

 mitriform, shorter than the capsule, plicate, pilose. Male 

 inflorescence gemmaceous in the axil of a leaf below the 

 pericha3tium. 

 28 



