JT('j)((ti('<r 1)1' Xdflh Aiiicrica. 7'") 



2. M. thuja Dimiort. Stems ciee])iji^-. s|.iiriiiyly 

 ln-iim-hed. si]ui)l_v iiiniiatc; hraiiclies sliort; leaves f'nseous- 

 »>Teeii, closely imbricate; njjper lol)e strongly incurved, obtuse 

 with the apex mucronulate or 2-4-denticnlate; lower lobe ob- 

 long, somewhat acute, repaiul and somewhat denticulate; am- 

 phigastria broadly ovate, reflexed-spreadiug, subentire. (Jun- 

 gennania thuja Dicks.) 



Hah.— 1\\. {Wolf). (En.) 

 5i7).— Hep. Europ. p. 24. 



3. M. Sullivanti Aust. Stems mostly simply pinnate, 

 the apex strongly decurved in drying; leaves somewhat erect, 

 the ventral margin close, strongly involute toward the apex; 

 cells large punctate-stelliform; inner involucre broadly carinate 

 beneath, the carina biangular; otherwise near M. iiir()liif(t 

 Hampe. 



Hah. — Alleghany Mts. {Snldvant). 

 Bib.— Torrey Bull. Ill, 15. 

 ^r.sjc— Hep. Bor.-Amer. No. 94. 



ff Sf('nis soineir/iaf Jii-fr/jihiiKife. 

 'I Loirer lohc ofle(tres iKirrotr, orate-hnicpokife. 



4. M. involuta Hampe. Stems irregularly 'pinnately 

 decompound: leaves closely iyibricate, subrotund, deflexed, re- 

 pand or entire, the ventral margin slightly involute, the base 

 decurrent, the lobe narrow; amphigastria approximate, quad- 

 rate-ligulate, entire. 



ITab. — Banks of rivers, So. States {Lesiqiiereux, Beyrich). 



Bih.-Syn. Hep. p. 282. 



Exsic — Hep. Bor.-Amer. Xo. 93. 



'l'^ Loirer lohe of h'arcs broader. 



T). M. platyphylla Dumort. Stems irregularly l)ipin- 

 nate; upi)er lol)e of leaf roundish-ovate, the basal margin more 

 or less undulate; the inferior lobes smaller, obliquely oval or 

 subrotund. the margins deflexed: amphigastria round-obovate 

 with reflexed margins, subentire; involucral leaves denticulate 

 or entire; mouth of inner involucre nearly entire. (JutKjer- 

 mania platiiphyUa L.. Lejeunia platyphplla Corda.) A variety 

 is Jiinfjermania plaftjpliijnoidea Schwein.. fMadotlieca jdatij- 

 phijlloidea Dumort.), (An.^fin). 



