Hepatico} of North AniericcL 53 



Leaves complicate-bilobed, the dorsal lobe usually 

 smaller; inner involucre compressed parallel to the 

 plane of the stem, the apex usually decurved, the 

 mouth truncate, entire or ciliate. XXIX. Sca- 



PANIA. 



Note.— Some forms of Jungermania without amphigastria 

 have the leaves complicate-concave and may be souglit here, 

 especially Nos. 20, 21, 22 and 28. See foot note under R in 

 this table. 



Leaves bilobed or bifid at apex, not complicate V 



Leaves entire or merely dentate at apex X 



f Involucre many leaved W 



^ I Involucre few leaved; some forms of XXVIII Junger- 



1^ MANIA. 



Involucral leaves imbricate; inner involucre wanting; 

 leaves closely imbricate. XXXII. Cesia. 



Involucral leaves united nearly to the top into an ob- 

 long tube; inner involucre 6-toothed, connate with 

 the outer. XXXI. Nardia. 



Involucral leaves free; inner involucre present; some 

 forms of XXVI. Cephalozia. 



Involucral leaves larger than those of the stem ; inner 

 involucre compressed at right angles to the plane 

 of the stem, the mouth truncate, entire or ciliate- 

 toothed; leaves often turned to one side. XXX. 

 Plagiochila. 



Involucral leaves similar to those of the stem; inner 

 involucre retrorsely subarcuate or at length cylin- 

 dric; the mouth contracted, ciliate; the cilia ar- 

 ticulate, connivent in a short cone; leaves entire. 



XXIII. LlOCHL^NA. 



Not included in the above are some species of the 

 ubiquitous XXVIII Jungermania. 



