128 HEPATIC^. 



1. Bazzania trilobata (Z.), Gr. 8f B. 



MtisGoides ierrestris repens, ex obscuro virescens, foliis superioribus et inferioribus 

 ad extremiiatem dentatis, Mich. Nov. pi. gen. p. 10, t. 6. f. 2 (1727). 



Lichenastrmii pinnulis obtuse trijidis nervo geniculato, Dill. Hist, muse, p. 493, 

 7, 71, f. 22 (1741). 



Jungermania trilobata, Linn. Sp. pi. 1599 (175?») ; Hook. Brit. Jung. t. 7G 

 (1816). 



Bazzania trilobata, Gr. it B. Nat. Arr, Brit. PI. p. 704 (1821). 



Pleuroschisma trilobatum, Dum. Syll. Jung. p. 70 (1831). 



Jlerpetium ti'ilobatum, Nees, Nat. Eur. Leb. Ill, p. 49 (1838). 



^[astigobryum trilobatuvi, Nees in G.L.N. Syn. Hep. p. 230 (1845). 



Dioicous, densely csespitose, flagelliferous, large, dark to olive 

 green in colour. Stems on a cross-section showing about 20 cells 

 in diameter, cortical about 90, the 2 or 3 outer layers composed of 

 subquadrate cells with firm walls, equal in size to the inner, which 

 are hyaline with thin walls ; simple or once or twice dichoto- 

 mously branched, erect procumbent or creeping horizontally on 

 the ground, llexuose, rather rigid ; flagella abundant, about an 

 inch long, descending from the postical side of the stem, beset 

 with minute leafy scales ; radiculose, rootlets few, fibrous. Leaves 

 more or less imbricate on the antical side of the stem, horizontal, 

 distichous, semi-broadly-ovate, broadly truncate at the apex, tri- 

 dentate, teeth acute, sinuses acute ; texture firm, epidermis 

 slightly polished, cells medium to rather large in size, roundish- 

 quadrate, angles thickened or with large distinct trigones, walls 

 thick. Stipules transversely inserted (not cordate), oblong quad- 

 rate, coarsely and irregularly dentate, cells with thickened angles. 

 Inflorescence cladocarpous, $ on short postical branches, bracts 

 few, much smaller than the leaves, of a delicate texture, cells 

 elongate, walls thin ; orbicular or subrotund, ciliate at the apex. 

 Perianth highly exserted, lanceolate, cylindrical at the base, which 

 is 4 layers of cells thick, near the middle 2, upper portion 

 triplicate and composed of a single layer of cells, about 170 

 cells round, mouth small, with few teeth 3 to 4 cells long, 

 2 to 4 cells wide at the base. Calyptra small, oblong-ovate 

 4 cells thick at the base, 2 above, pistillidia about 8, long and 



