HANDBOOK OF BRITISH HEPATIC^E. 



39 



spreading, formed of two unequal lobes, of which 

 the upper the largest, convex, ovate, acuminate at 

 the extremity, where it is often curved, usually 

 downwards (fig. 29), margins entire or serrate ; 

 lower lobe half the size of the upper, which it 

 resembles in shape, involute, with the margin 

 rarely slightly serrate. Colour pale 

 green ; perichaetial leaves nearly twice 

 the size of the cauline ones, two 

 to each calyx, which they embrace 

 at the base. Stipules small, ovate, 

 acutely cleft half way down into two 

 sharp equal segments, the margins 

 entire. Calyx ovate or obovate, dis- 

 tinctly ribbed, with five prominent, 

 and acute angles, nearly to the base, 

 mouth contracted, generally elevated 

 and tubular, cut into sharp fine teeth. 

 Capsule spherical, white, membra- 

 nous, cleft half way. Elaters bispiral. 



Lejeunia ovata, Dicks., Tayl. 



Stems creeping, branched, subterete ; leaves 

 vertical, imbricate, incurrent, auriculate ; 

 larger limb plane, ovate, acute, lobule saccate ; 

 involucral leaves two-lobed ; stipules small, 

 distant, bifid ; perianth obovate, apex acute, 

 five-angled. 



Jungermannia ovata, Dicks. PI. Crypt. III., 

 t. 8, f. 6. Jungermannia serpyllifolia fi. ovata, 

 Hook. Br. Jung. No. 42. Lejeunia ovata, 



