Jungermannia.] HEPATICvE. 67 



upper lobe oblongo-rotundate, the lower a minute involution of 

 the upper ; stipules rotundate, bifid ; fruit lateral; calyx obo- 

 vate, pentagonal, the mouth contracted, somewhat toothed; cap- 

 sule pellucid, quadrifid. Dicks. Cr. Fasc. 4, p. 19. Hook. Br. 

 Jung. t. 42. 



On mosses, trees, and rocks ; very common. A variety occurs at 

 Blackvvater Bridge, County of Kerry, exceedingly minute ; the leaves 

 acute, marginated ; the stipules scarcely wider than the stem ; their 

 segments divergent. Another on Blackwater Hill, under rocks, is more 

 than double the usual size in all its parts, and grows so much in tufts 

 that in dry weather these form cushions of an inch in depth. 



70. J. hamatifolia, Hook. Stem creeping ; leaves unequally 

 2-lobed, the upper lobe ovate, acuminated, somewhat incurved, 

 the lower involute ; stipules ovate, acutely bifid ; fruit lateral ; 

 calyx obovate, pentagonal, the mouth contracted, toothed ; 

 capsule pellucid, quadrifid. Hook. Br. Jung. t. 51 . 



On old stems of furze, also on trees and wet rocks ; common. 

 Sometimes, as at Woodlands, near Dublin, the stipules are scarcely to 

 be found, and the calyx is by no means angular. 



71. J. minutissima, Smith. Stem creeping; leaves indis- 

 tinctly and unequally 2-lobed, the upper lobe hemispherical, the 

 lower minute, almost obsolete ; stipules ovato-rotundate, bifid ; 

 fruit lateral ; calyx obovato-rotundate, pentagonal, the mouth 

 contracted, slightly toothed ; capsule pellucid quadrifid. Eng. 

 Hot. 16-33. Hook. Br. Jung. t. 52. 



On trees at Woodlands, near Dublin. On stems of furze, also on 

 rocks, County of Kerry. However minute this species, as compared 

 with most of its congeners, yet is it several times larger than J. mi- 

 croscopica. 



72. J. calyptrifolia, Hook. Stem creeping ; leaves unequally 

 2-lobed, the upper lobe larger, very concave, rotundate, suddenly 

 elongato-acuminate, the lower obtusely quadrate, involute ; 

 fruit lateral ; calyx oblong, the top flat, sub-5-dentate, the mouth 

 contracted ; capsule pellucid, quadrifid. Hook. Brit. Jung, 

 t. 43. 



On the stems of old furze in the mountains, near Glengaritf, 

 Miss Hutchins. Near Dunkerron, in the mountains ; not very 

 rare. 



* * * Lower segments of the leaf saccate. 



73. J. Hutchinsice, Hook. Leaves unequally 2-lobed, the 

 upper lobe ovate, spinuloso-serrate, the lower minute, saccate, 

 often unidentate at the base ; stipules rotundato-ovate, subser- 

 rate, acutely bifid; fruit lateral; calyx triangulari-obcordate. 

 Hook. Br. Jung. t. 1. 



On the wet faces of rocks, especially of waterfalls in woods ; near 

 Bantry, Miss Hutchins. Near Killarney. Not very rare. 



74. J. dilatata, Linn. Stems prostrate ; leaves unequally 



