238 EEPATICjE. 



Obs. — One of the most distinct species of this genus, smaller 

 than most of them, but more robust than S. curta ; its colour and 

 the acute serrated leaf-lobes distinguish it from them all. 



The late Prof. Lindberg, in his "Muse. Scand." (1879), stated 

 that the Jim^. umbrosa of Schrader (1797) was without doubt the 

 same as the Jiin(/. convexa of Scopoli (1772), so along with others 

 I adopted the older name. Prof. Howe, in his admirable 

 " Hepaticse and Anthocerotes of California," says, " it is very 

 probable that it may be so, yet, as Scopoli describes the perianth 

 as oval and dentate at the apex, while those of S. umhrosa are 

 oblong and entire at the mouth, we prefer to retain for this species 

 a name concerning the correct application of which we can have 

 no doubt," so I gladly follow my friend Prof. Howe in retaining 

 this very characteristic one. 



Description or Plate XCVI. — Fig. 1. Plants natural size. 

 2. Stem X 31 (15, Austin, Amer. Hep.). 3-7. Leaves x 24 

 (20, C. & P. Hep. Brit.). 8. Portion of leaf x 290 (Woodhead, 

 Whitehead & W. H. P.). 9. Bract x 31 (Husn., Hep. Gall, 

 n. 66). 10. Perianth x 24 (Goathland, W. H. P.). 11. Pis- 

 tillidia x 85 (Husn. Hep. Gall. n. 66). 10. Perigonial bract 



x 31 (Woodhead, Whitehead «& W. H. P.). 13. Antheridium 



X 85 (ditto). 



Genus 21. DIPLOPHYLLUM, Dum. 



Jungermania, Mich. Nov. PI. Gen. p. 8, tab. 5, fig. 9 (1729) ; Linn. Fl. Suec. 



1st ed. p. 335(1745); Hook. Brit. Jung. (1816). 

 Diplophyllum, Dum, Eecueil, 1, p. 15 (1835). 

 Scapania, Mitt, in Hook. Fl. Tasm. 2, p. 233 (1858). 



Brandies axillary, proceeding from the inner base of the leaves. 

 Leaves conduplicate, unequally bilobed, the antical lobe smallest. 

 Stipules absent. Involucral bracts small, similar to the leaves. 

 Bracteole absent. Perianth free, sessile, erect, terete, subcylin- 

 drical, pluriplicate, mouth denticulate. Capsule coriaceous, 

 4-valved. 



