236 TASMANIAN HEPATIC^. 



leaves. Perianth 2-3 partite. Calyptra herbaceous, globose 

 or clavate, often longer than the perianth, bursting irregu- 

 larly at the apex. Capsule ovoid, on a slender fruitstalk ; 

 elaters with two spiral fibres. Antheridia in the saccate 

 dorsal bases of perigonial leaves, which resemble the cauline. 



J. Leaves opposite, stipules united to both the leaves 

 below them by their decurrent margins. 



* Leaves united by their dorsal bases (free in J. Bil- 

 lay^dieri.) 



t Leaves entire, or nearly so, at the apex. 



1. C. conjugatun. 



2. C. BUlardieri. 



3. C. Gunnianus. 



4. C. sinuosus. 



tt Leaves strongly 2-5 dentate at the apex. 



5. C.fissistipus. 



** Dorsal bases of the leaves not connate. 

 t Leaves 2-4-toothed at the apex. 



6. C. coaliius. 



7. a Colensoi (?) 



II- Leaves alternate, stipules united by one decurrent 

 margin to a leaf below them. 



8. C. laxus. 



9. C. tridentatus. 



III. Leaves opposite or alternate, stipules free. 



10. C. echinellus. 



11. C. cymhaliferus, 



1. C. coNJUGATUS, Mitten. Stems creeping, elongate, 

 sparingly dichotomously branched ; leaves imbricate, 

 oblong-rotund, united at the dorsal margin, remotely 

 spinulose-dentate at the base or entire, opposite. 

 Stipules half as large as the leaves, incurved, sparingly 

 denticulate. Cells of leaves minute, round. Fl. Tas., 

 ii., p. 228. (PL xiii.) 



Without exception the largest species of the genus. 

 In external appearance and colour it resembles C. BU- 

 lardieri, but the form of its leaves, and particulary that 

 oi the stipules, which resemble nothing so much in out- 

 line as the human occiput as seen from behind, render it 

 very distinct from all allied species. The united dorsal 



