NEW HEPATICjE. 269 



Hab. Niger Expedition. Vogel, Hook. Herb. 



Patches little more than 1 inch high, dusky olive-green. 

 Stems irregularly branched, almost all the branches bearing 

 in their course, or at their summits, perigonial spikes. Leaves 

 cristate on the inferior side of the stem. Bases of the peri- 

 gonial leaves tumid, closely imbricated, their tops slightly 

 twisted and squarroso-recurved. Allied to P. concava, Lind., 

 but our plant is much larger, more branched, and has the 

 leaves longer, more decurrent, and more distinctly denticulate. 



25. P. Colensoi, Hook. fil. et Tayl. ; caule laxe caespitoso, ad- 

 scendente, ramoso ; foliis laxe imbricatis, erecto-patentibus, 

 secundis, rotundato-ovatis, convexis, margine utroque re- 

 curvis, inferiori apiceque dentatis ; calyce demum laterali, 

 ex angusta basi oblongo, rotundato-truncato, dentato. 



Hab. New Zealand, n. 159. Colenso, Hook. Herb. 



Tufts loose, brownish-olive. Stems nearly 2 inches long, 

 variously branched. Lower leaves smaller and nearly round, 

 all of them minutely cellular. Perigonia are lanceolate spikes 

 of 7-8 pairs of closely adpressed leaves ; they occur in the 

 course of the shoots. Pericheetial leaves erect, adpressed to 

 the calyx, and covering two-thirds of its length. Pedicels 

 but little exserted. Capsule oblong. In our P. aculeata the 

 leaves are very similar in outline but they are more patent, 

 their dentation is coarser, their cellules far larger, while the 

 calyx is much shorter and with stronger cilia. 



26. P. Bunburii, Tayl.; caule caespitoso, erecto, ramoso; 

 foliis imbricatis subpatentibus, oblongo-ovatis, obtusissi- 

 mis, apice subdenticulatis, marginibus sub-recurvis ; calyce 

 demum axillari, oblongo, bilabiato, labiis late linearibus, 

 ciliatis, hinc partito, immerso. 



Hab. Rio de Janeiro. Mr. Bunbury, Hook. Herb. 



Patches wide, dusky yellowish -olive. Stems scarcely 

 2 inches high, irregularly branched, sometimes dichotomous. 

 Leaves with the inferior margins gibbous and slightly cris- 

 tate, their denticulation very minute, rarely wanting. Peri- 

 chaetial leaves erect, one-third longer than the calyx. One 

 lip of the calyx is usually bilobate. 



