,56 TASMANIAN BRYOPHYTA, 



FiMBRiARiA. — Sporophytes on a persistent carpoce- 

 phalum ; each contained in a white, conspicuous fim- 

 briated perianth. 



Pores formed of a barrel-shaped arrangement of cells. 



Marchantia. — Sporophytes on a persistent carpoce- 

 phalum, aliernating 'with the rays. Gemmae in fringed. 

 cups. 



Targionia, L. 

 Thallus touo-h, vath small air chambers on th© upper 

 surface ; pores simple, surrounded by several concentric 

 rings of cells; ventral surface with two rows of large ob- 

 liquely triangular scales, each with a broadly awl-shaped 

 appendage. Antheridia on special branches arising from 

 the under surface, cylindric, with an expanded terminal 

 receptacle just emerging from the side of the frond. Arche- 

 gonia in two rows on the ventral surface, just behind 

 the growing point, enclosed in two large bracts. Sporo- 

 phyte spherical, with a short stalk, enclosed in the en- 

 larged pui-ple bracts, slightly protruding at maturity. 



Targionia hypopliylUK L. — Fronds cuneate, 1-2 cm. 

 long, apex bifid, sometimes dichotomous, but more often 

 the branches arise from tlie ventral surface, which is 

 purple to black. Mature involucre nearly black, about 4 

 mm. diameter, just protruding from beneath the ap<c;x. 



McKobie's Gully, Colebrook, Launceston, etc. Ma- 

 ture about October. 



Cosmopolitan. 



Reboulia Raddi. 



Thallus dichotomously branched, flat ; air chamber's 

 small on the dorsal surface, with simple pores, sur- 

 rounded by several rings of concentric cells, ventral 

 s.urface pui-ple, with two rows of large oblique obovate 

 scales, each with two linear appendages. Antheridia on a 

 flat sessile receptacle placed on the dorsal surface close be- 

 hind the apex. Carpocephalum persistent, hemispheric, 

 with a more or less lobed margin, on a long stalk. Cap- 

 sule globose on a short stalk, no perianth, contained each 

 within an involucre placed on the ventral aspect of a lobe. 

 The pores of the carpocephalum are barrel-shaped in longi- 

 tudinal section ; the stalk has a single furrow, with numer- 

 ous rhizoids. No gemmae cups. 



JRchoiiHa liemisjiherira (L.), Ba(]<]i. — Fronds robust, 

 fleshy. Much resembling a Marchantia, but readily dis- 

 tinguished by the absence of areolae, the pores in section 

 being simple, not barrel-shaped, and the capsules being 



