76 Illinois State Lahoratorij of Nafiinil History. 



i/a/;.— On rocks and trees ; common eastward. (Eu.) 

 -Bi6.— Syn. Hep. p. 278 ; Hep. Europ. p. 23. 



Delhi.— BrW. Jung. t. 40; Ekart, t. Ill, f. 24; Sulliv. Mosses U. S. 

 t. VIII. 



Erdc.—lle^. Bor.-Amer. No. 89, 90. 



6. M. navicularis Nees. Stems subbipinnate, somewhat 

 rigid, most of the branches recurved at the apex, some obtuse, 

 others attenuate; upper lobe of leaves somewhat smooth, subor- 

 bicular, obtuse, the posterior margin undulate-crisped at the 

 base and beyond; inferior lobe entire, obliquely cordate- oval, 

 obtuse, deflexed, boat-shaped; amphigastria subrotund, obtuse, 

 the margins reflexed, entire or undulate at the base; mouth of 

 the inner involucre subentire. (M. Ccdifornica Hampe., Jun- 

 germania navicularis Lehm.) 



Hah. — On rocks, Cal. {Bolander). (Eu ) 



Bih.—)iyj\. Hep. p. 277 (ex parte); Hep. Europ. p. 24. 



Exsic. — Hep. Bor.-Amer. No. 91. 



7. M. porella Nees. Stems 5 — 10 cm. long, bi-tripin- 

 nate, the branches forked, divergent; leaves somewhat distant, 

 the upper lobe oblong-ovate, obtuse; lower lobe much smaller, 

 appressed to the stem, oblong, flat; amphigastria quadrate, en- 

 tire; involucral leaves entire, the lobes ovate; inner involucre 

 bilabiate, the lips subcrenate. (M. Conlavnta Dumort., Junger- 

 mania p07^ella Dicks., Porella pi nnata Schwaegr.) A variety is 

 Jungermania clistans Schwein. (Austin). 



Hah.— On rocks and trees subject to inundation, common. (Eu.); 

 the variety in the So. States. 



5*.— Syn. Hep. p. 281 ; Hep. Europ. p. 25. 

 ^.rstc.-Hep. Bor.-Amer. No. 92, 92b. 



8. M. Wataugensis Sulliv. Similar to the last but 

 smaller and more delicate, with fascicles of rootlets springing 

 from the base of the amphigastria; leaves light yellowish 

 brown, the upper lobe slightly repand-dentate. 



Hah.— On decayed logs, banks of Watauga R., N, C. {SuUivant). 



** Amphigastria ivith 2-3 candcf on either side at base. 



