72 Illinois State Laboratory of \(ttura't Ilixtory. 



12. L. laete-fusca Aust. Stems creeping, 1 1.7 cm. 

 long; leaves fuscous more or less imbricate, very broadly fal- 

 cate-ovate, patent, slightly convex, obtuse, with 2 3 much en- 

 larged cells in the centre next the basal row, the lobe minute, 

 subovate; amphigastria small, orbicular, the laciniae erect, 

 somewhat acute; sporogony phase unknown. 



Hob So. States? (Sullivant). 



Bib Rot. Bulletin (now Bot. Gazette) I, 36. 



13. L. Ravenelii Aust. Stems short, flexuous, convex 

 above; leaves yellowish ; imbricate, obdeltoid-orbicular, strongly 

 convex, the lobe minute, subinflated; amphigastria minute, 

 rotund, bilobed, the lobes obtuse; areolation of leaves large, 

 opaque; sporogony phase unknown. 



Hob Bark of trees, S. C. (Ravenel). 



Bib Bot. Bulletin (now Bot. Gazette) I, 35. 



*** Amphigastria obsolete or wanting. 



14. L. minutissima Dumort. Stems capillary, flex- 

 uous, sparingly branched; leaves small, approximate, vertical, 

 subrotund, imperfectly 2-lobed, the lower lobe an indistinct 

 fold; amphigastria obsolete; inner involucre terminal on a 

 rather long branch, broadly obovate, compressed, 5-angled, the 

 mouth obtuse, papillose. ( L. ulicina Tayl., Junyermania 

 minwtissima Sm.) 



Hob Roots of trees, Ala. (Eu.) 



Bib. Syn. Hep. p. 387, 767; Hep. Europ. p. 19. 



Delin. Brit. Jung. t. 52. 



15. L. echinata Tayl. MS. Stems loosely branching, 

 niinute ; the whole plant scarcely visible to the unaided eye; 

 leaves ovate, acuminate, cellular-echinate and denticulate, fal- 

 cate-decurved, sinuate-complicate at the base; amphigastria 

 obsolete; inner involucre on a very short lateral branch, pyri- 

 form-clavate, acutely 5-angular, the margin echinate-muricate ; 

 involucral leaves bifid, the lacinia? entire. (L. calcarea Libert, 

 Jungemnania hamatifolia var. echinata Hook.) 



Hob. Rocks and roots of trees ; rather common. (Eu.) 

 Bib. Syn. Hep. p. 344 (sub. L. calcarea]} Hep. Europ. p. 19. 

 Delin. Brit. Jung. t. 51. 

 Exsic. Muse. Alleghan. No. 275 ;Hep. Bor.-Amer. No. 99. 



