438 Transactions. — Botany. 



stalk short, erect. Capsule immersed, large, oblong, pyriform, 

 narrowed slightly to the mouth. Peristome single, 8, bigemi- 

 nate. Operculum small, short, eonico-rostrate. Calyptra 

 mitriform, about half the length of the capsule, plicate, not 

 pilose. 



Hab. Eocks, Lyttelton hills ; September, 1888. Collected 

 by E. B. 



Section D. 



Calyptra not pilose. Peristome double. 



29. Orthotrichum avonense, sp. nov. 



Plants monoecious, light-green, growing in small tufts about 

 |-in. high, branched by innovations. Branches short, fastigiate. 

 Leaves erecto-patent, imbricating, small. Leaves very similar 

 in their outline, the upper being largest, linear-lanceolate 

 from an ovate erect sheathing base, acute, concave. Margins 

 plain, entire. Nerve keeled, continued to the apex. Areola 

 punctiform to near the base. Leaves erect when dry. Peri- 

 chcetial leaves very small, erect, oblong-lanceolate, acute, 

 concave. Margins entire, plain. Nerve continued to the 

 apex. Fruitstalk nearly erect, -|in. long. Capsule small, 

 exserted, pyriform, tapering into the fruitstalk, mouth wide. 

 Peristome double : outer 8 bigeminate, entire ; inner 8 cilia 

 consisting of one row of slender cells nearly as long as the 

 outer teeth. Operculum large, conic, acute, about one-half 

 the length of the capsule. Calyptra mitriform, as long as the 

 capsule, plicate, not pilose. 



Hab. Trees near Eiver Avon ; November, 1886. Collected 

 by E. B. 



30. Orthotrichum nudum, sp. nov. 



Plants monoecious, yellowish-green above, brown below, 

 growing in small loose tufts from Jin. to fin. high, branched 

 by innovations. Branches spreading, subfastigiate. Leaves 

 imbricating, spreading, oblong-lanceolate, acute ; middle and 

 upper ones larger but otherwise similar in their outline, 

 oblong-lanceolate, acute, sheathing at the base, concave. 

 Margins plain, entire. Nerve disappearing in the apex. Are- 

 ola: Upper punctiform ; lower small, oblong. .Leaves slightly 

 crisped when dry. Perichcetial leaves smaller than the upper 

 ones, oblong-lanceolate, acute, concave. Margins plain, entire. 

 Nerve disappearing in the apex. Fruitstalk T V n> l° n g> erect. 

 Capsule subimmersed, pyriform. Peristome double : outer 16 

 geminate, entire; inner 16 cilia consisting of one row of cells 

 as long as the outer teeth. Operculum stout, eonico-rostrate, 

 beak short. Calyptra as long as the capsule, mitriform, 

 plicate, not pilose. Male inflorescence gemmaceous in the axil 

 of a leaf. 



