70 ZYGODON. 



HAB. In subalpine countries, principally among rocks iu ij 

 a calcareous soil. 



3. F. hilermca ; stems elongated, leaves plane, ovato-lanceo- 

 late, gradually acuminated, serrated, nerve disappearing be- 

 low the point ; fruitstalks straight. (TAB. XX.) 



F. hibernica. Hook, in Fl. Lond. ed. 2. (with a figure.) F. Muhlen- 

 bergii. Mohr FL Cr. Germ. p. 380. F. calcarea. Wold, in Act. Holm. 

 1806.J.4./.2? 



HAB. Roof of a thatched cottage at Blarney near Cork, 

 Ireland. Mr. Drmnmond. 



Distinct as this species may appear at first sight from the 

 preceding one, future observations may prove it to be the 

 same. We are certain it is the F. Muhlenlergii of Mohrj 

 and Dr. Swartz, judging only from the figure in Flora Lon- 

 dinensis, informs us that it is truly the F. calcarea of Wah-s 

 lenberg, a name which it ought to bear if this suggestion 

 prove correct, and if it prove, as Dr. Swartz believes that it 

 will, a legitimate species. 



From the F. Muhlenlergii of Turner and Schwaegrichen, 

 our plant may be known by its much longer stems and fruit- 

 stalks, its more distantly placed, longer, plane, and more 

 gradually acuminated leaves. 



23. ZYGODON. 



GEN. CHAR. Fruitstalks terminal ; Peris to?ne double 5 i 

 the exterior of 16 teeth approaching in pairs ; the I 

 interior of as many ciliary processes lying horizon- 

 tally; Calyptra dimidiate, smooth. (TAB. III.) 



The very singular plant which forms the subject of this ge- 

 nus was called Bryum by Dickson 5 and by Smith Mnium, on j, 

 account of its furrowed capsule. The form of this capsule, and i 

 its being erect, correspond well with Orthotricfium, with which 

 likewise it has the greatest affinity in its peristome, according to 

 the drawings and observations of Mr. Templeton. To these we 

 have been obliged to have recourse, (not having the opportunity 

 of seeing specimens in a sufficiently good state to examine the ; 

 peristome,) both for our character and our figure. The charac- 

 ter which at once distinguishes this genus from Orthotrichum is 



