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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. — 



41. 



{Plate 2, fig. 17.) 



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. 



J linger mannia platyphylla, Linn. Sp. 1600 ; 

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

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

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

 364 ; Cooke Hep. f. 143, 144, 145. Lejeunia 

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

 Porella platyphylla, Carr. and Pears. Exs. 

 No. 71. 



On trunks, &c. 



var. (3 major, vaguely bipinnately branched, 



