6o 



HANDBOOK OF BRITISH HEPATIC/E. 



rows, 



closely imbricated and placed alternately, 

 divided into two unequal lobes (fig. 

 41), the upper much the largest, con- 

 vex, smooth, roundish, ovate, margin 

 sometimes entire, sometimes dentate 

 with unequal spinulose teeth, at irregu- 

 lar distances. The inferior lobe scarcely 

 one-third so large, obliquely adpressed, 

 oblong or ligulate, margins dentate, 

 ^ teeth occasionally recurved. Stipules 

 • one to each pair of leaves, oblong- 

 quadrate, resembling the smaller lobe, 

 spinulose dentate at the margin. — 



2,fig^ I?') 



Porella platyphylla, Linn. 



Stem procumbent, bipinnately branched, 

 leaves rounded-ovate, and, as well as the 

 auricles and strap-like stipules, quite entire. 

 Involucral leaves toothed or entire. 



Jiingermannia platyphylla, Linn. Sp. 1600; 

 Eng. Bot. t. 798 ; Hook. Br. Jung. t. 40. 

 Madotheca platyphylla, Dumort. Comm., p. 1 1 1 ; 

 Gott. and Rabh. Exs. No. 51, 157, 158, 363, 

 364; Cooke Hep. f. 143, 144. I45- Lejeunia 

 platyphylla, Corda. in Sturm. Fl. XXH., t. 26. 

 Porella platyphylla, Carr. and Pears. Exs. 

 No. 71. 



On trunks, c^c. 



var. ^ major, vaguely bipinnately branched, 



