204 HEPATIC^. 



Genus 19. ADELANTHUS, Mitten. 



Jungermania, Hook, in Eng. Bot. t. 2567 (1818). 



Radula, Dum. Syll. Jung. p. 43 (1831). 



Plagiochila, G.L.N. Syn. Hep. p. 24 (1844). 



Adekmthtos, Mitt, in Journ. Linn. Soc. p. 2G4 (1864). 



Sphagncecetis, Hartm. Skand. Fl. ed. 10, 2, p. 144 (1871). 



Odontoschisma, Lindb. MSS. in Hartm. Skand. Fl. ed. 10, 2, p. 144 (1871). 



Plants caespitose, pale or dark green. Stems firm, caudex 

 creeping, simple or slightly branched, radiculose, suberect, apex 

 often decurved or subcircinnate, producing from near the base 

 postical tlagella which are minutely leaved and radiculose. Leaves 

 succubous, moderately large, alternate, obliquely rotund or ovate, 

 decurvo-secund, antical margin incurved, subentire, postical sub- 

 plane, very often spinulose-dentate ; cell rather large to minute, 

 guttulate, pachydermous, trigones distinct, marginal cells minute, 

 opaque. Stipules none or very rare and minute. Inflorescence 

 dioicous, cladogenous, postical. Bracts $ tristichous, the inner- 

 most slightly smaller than the leaves, apex bifid or variously 

 incised. Pistillidia 12-15. Perianth pyriform or fusiform, 

 turgid, 3-5 angled, mouth denticulate. Calyptra a little smaller, 

 carnose, below the middle 3-5-stratose, sterile pistillidia surround- 

 ing it. Capsule oval, 4-valved, bistratose. Androecia amentifbrm ; 

 antheridia solitary, very rarely two. 



Adelanthus decipiens [Hook.), Mitt. 



Jungermania decipiens, Hook, in Eng. Bot. t. 2567 (1813) ; Brit. Jung. t. 50 



(1816). 

 Radida decijnens, Dum. Syil. Jung. p. 43 (1831). 

 Plagiochila decipiens, Dum. E.ecueil, p. 15 (1835). 

 Gymnanthe decijnens, Mitt. Journ. Linn. Soc. 11, p. 166 (1863). 

 Adelanthus decipiens. Mitt, in Journ. Linn. Soc. p. 264 (1864). 

 Odontoschisma decipiens, Lindb. MSS. in Hartm. Skand. Fl. 11, p. 144; Lindb. 



Soc. Faun, et Fl. Fenn. 13, pp. 357-363 (1874). 



Dioicous, densely caespitose, flagelliferous, medium size, dark 

 olive green when growing, below and when dry, dark brown in 

 colour. Caudex prostrate, intricately branched below, producing 



