58 HEPATICiE. [Jungermannia. 



10. J. spinulosa, Dicks. Stem erect; leaves ovate recurved, 

 their margin and apex on one side dentato-spinulose, fruit la- 

 teral, calyx roundish, compressed, the mouth truncated, ciliated. 

 Dicks. Cr. Fasc. 2, p. 14. Hook. Br. Jung. t. 14. 



On trees and shaded rocks ; common. Miss Hutchins discovered a 

 minute variety of this, with the leaves few, tridentate. At Croma- 

 glown is another on trees in ca;spitose, horizontal shoots, whose leaves 

 are minute, cordate. 



1 1. J. decipiens, Hook. Stem erect, the upper leaves sub- 

 compressed larger, rotundate, the lower ovate, all of them mar- 

 ginate, reticulated, with very few spiniform teeth. Hook. Br. 

 Jung. t. 50. 



On rocks in exposed situations ; not very uncommon in the South 

 of Ireland. 



12. J. pumila, With. Stem ascending rather short ; leaves 

 oblong, concave ; fruit terminal ; calyx oblongo-ovate, acumi- 

 nate, plicate, the mouth dentato-ciliate. With. Bot. Arr. ed. 3, 

 p. 866. Hook. Br. Jung. t. 17. 



On rocks at the sides of streams and rivers ; common. 



13. J. cordifolia, Hook. Stem erect; leaves erect, concave 

 cordate, amplexicaul ; fruit terminal and axillary ; calyx oblongo- 

 ovate, subplicate, the mouth minute, denticulate. Hook. Br. 

 Jung. t. 32. 



On Mangerton, in the stream from the Punch Bowl. 



14. J. Sphagni, Dicks. Leaves orbicular, secund; fruit 

 terminal on short proper branches; calyx oblong, wider in the 

 middle, the mouth contracted, denticulate. Dicks. Cr. Fasc. 1, 

 p. 6, t. 1. Hook. Br. Jung. t. 33, and Supp. t. 2. 



The clusters of gemma are sometimes found on the tops of branches 

 leafy throughout. 



15. J. crenulata, Smith. Stem procumbent; leaves orbi- 

 cular marginated, often secund; fruit terminal; calyx obovate, 

 compressed, quadrangular, the mouth much contracted, toothed. 

 Eng. Bot. t. 1463. Hook. Br. Jung. t. 37. 



On heaths and in woods ; not uncommon. The calyx opens by 

 four lacinice, each of which is serrulated ; its mouth at length becomes 

 widely expanded. 



16. J. sphcerocarpa, Hook. Stem ascending ; upper leaves 

 oblongo-ovate, the lower nearly round ; fruit terminal ; calyx 

 cylindraceo-obovate, contracted at the mouth, slightly curved ; 

 capsule elliptical. Hook. Br. Jung. t. 74. 



On stones ; at Turk Waterfall ; also near Dublin : not uncommon. 



17. J. hyalina, Hook. Stem flexuose ; leaves roundish 

 slightly waved, concave ; fruit terminal; calyx oblong ungulate, 

 the mouth contracted, toothed. Hook. Br. Jung. t. 63. 



On the stream's side of Sefing Mountain, near Dublin ; and at 



