110 Illiiio'iH Sfdfc Ldhoi-dlori/ (if ^satiiral Hisfori/. 



summit of the stem where they are equal; texture thin, flaccid; 

 inner involucre twice the length of the outer. {JuiKjermaiiia 

 undiilata L.) 



Var. purpurea Nees. Stems elongate, rather more lax; 

 leaves rose-colored or purplish, flaccid. 



Hdb.—'iw woods, damp meadows and rills, Eastern "U.S. and Cal. 

 [Bolandcr). (Eu.) 



Blh.—^yn. Hep. p. 65 ; Hep. Europ. p. 37. 

 Delin.— Brit. Jung. t. 22; Ekart, t, II, f. 14. 

 ^.mc— Hep. Bor.-Amer. No. 12, 13. 



*** Ventral Johe 3-4 times tJie size of tJic doysat. 

 f Margins entire. 



9. S. exsecta Aust. Stems ascending; leaves somewhat 

 complicate, entire, the dorsal lobe small, tooth-like, the ventral 

 ovate, acute or bidentate, concave; involucral leaves 3-5-cleft; 

 inner involucre oblong, obtuse, plicate. (Jimr/er mania exsecta 

 Schmid.) 



Hab. — On high mountains far northward ; rare. (Eu.) 

 Bib.— Syn Hep. p. 77 (sub. Jungermania) ; Hep. Europ. p. 73 (sub 

 Jungermania). 



' Delin.—Brii. Jung. t. 14 ; Ekart, t. V. f. 37, et t. XL 

 ^:mc.— Hep. Bor.-Amer. No. 21. 



10. S. uliginosa Nees, Stems frequently floating, erect 

 when terrestrial; leaves entire, somewhat rigid, deeply and un- 

 equally bilobed, the lobes rotund, the ventral convex, spread- 

 ing, about four times as large as the dorsal, the dorsal lobe 

 reniform, arched, incumbent; involucral leaves uniform with 

 those of the stem, the lobes entire; inner in^^olucre larger than 

 the outer. (Jungermania uliginosa Swz.) 



Hah.—Oo\. {BotaniaU of Wheeler's Sur.), Greenland {Syn. Hepat.) 

 (Eu.) 



Bib —Syn. Hep. p. 67 ; Hep. Europ. p. 39. 



ff Margins serrate or dentate. 



11. S. breviflora Tayl. Stems ascending; leaves den- 

 tate, deeply 2-lobed, the lobes triangular, the dorsal springing 

 from the plane of the ventral near its dorsal margin, the vent- 

 ral about four times as large; inner involucre as long as the 



