ON GYMNOMITRIUM OBTUSUM. 339 



Size, -25mm. long, by -15mm. broad, with bearer -4 long. 



2 „ -175 „ '4 



18 „ '14 „ -35 



>> 



>> 



Fertile stem. In all tlie plants examined I have failed to find 

 fruit, having only met with one imperfect female stem, which 

 upon dissection showed a broad involucral leaf with short tongue- 

 shaped segments ; archegonia few, oblong, apparently composed of 

 three layers of cells. -15 X .05mm., -13 x -Olnim., -115 x -03. 



Prof. S. 0. Lindberg, of Helsingsfors, has very justly raised to 

 the rank of a species what has by some hepaticologxsts been looked 

 upon as a form either of Gi/mnomitrium concinnatum or coraUoide$, 

 but from both of which it shows itself, upon close examination, to 



be different, and that constantly. . ■ . 



In the summer of 1876 Dr. Carrington collected it in abundance, 

 alon" with Q. concinnatum, at Glen Finnan, Inverness, and was at 

 the time inclined to look upon it as a form of Q. wrMndes; but 

 as it differed in some essential characters, preferred to send it out 

 along with Q, concinnatum, and so in some copies of Carr. & rear 

 Hep. Brit. Ex., Fasc. L, no. 1, Gymnotmtrvum obtusion as found with 

 G. concinnatum. Later in the autumn of 1878, I had my attention 

 called closely to it by receiving from my friend, Mr E. M. Holmes, 

 specimens marked G. coralhides, Cader Idris Merionethshire 

 August, 1878 ; I saw that it was the same that I had collected 

 previously on Cader, and Dr. Carrington m Scotland, and which 

 was distinctly different from true coralhides specimens of which 

 from the Continent I possess, and as this new species was given in 

 Gott. & Bab., Hep. Eur., no. 567, as Gymnomitnum concinnatum, 

 ' ' Khongebirge Geheeb, Folhs bilobis , lobis obtains margine ceUukiruin 

 prominentia crenulatis cuticula granulosa pulverulenta I left it 

 as a singular form of concinnatum until lately when Prof. Lmdbeig, 

 in a letter to Dr. Carrington, called attention to it as the one 



described 



From Gij 



by him as a new species, under the name Cesi* otema. 



Gumnnmitrium concinnatum it may be distinguished by its 



rounded obtuse finely crcnulatr segments; the closely and leguLuly 

 imbricating leaves, bifarously inserted, never secund as Piof. 

 Lindberg especially mentions ies 



Gymnomitnum crenulatum, Gottscne, is a >yu . j r 



with finer stems, arcuately branched, dark blackish Wn colour^ 



in ak^^ .t»ti«n. greenish; in this species the segments aie 



in snaaea stations gieemoxi, ^ — - j. T1QWn w <*lnvn- 



acute, with the **»^^%^S%3£2. 



Kft&SS &Xt ;; M &. of leaf, shown* 



apex of leaf and form of cells +300. h-Mummi ' m<r e 240 



In Limprichfs < Kryptogamen-Flora ^^^ ' 

 GymnomitrLn crenulatum, Gott., is given as aj et y f o* uinat u m 

 Corda. After observing it growing for se a 1 £«£«* ^ 



mecimens from different station* m Britain, i am 

 Eft as being a very distinct and characteristic 



examination of s_ 

 inclined to look upon 



s P ecies - ,, ., v-m 1,00 o m oiv pointed leaf without 



Gymnomitrium roraihi.hs, Jees, W*v»»»V irregular 



sinusi or if present, very shaUow; margin entire, oi vciy irregular 



