410 HEPATIC^. 



(ditto). IG. Pistillidium x 85 (Pass of Llanberis, W. H. P.). 

 17. Spores and elaters x (Dr. C). 18. Perigonial bract x 85 

 (Pass of Llanberis, W. H. P.). 19. Antheridium x 85 (ditto). 



Genus 35. ACROBOLBUS, Nces. 



Acrobolbus, Nees in G. L. N. Syn. Hep. p. 5 (1844). 

 Gijmnanthe, Tayl. MSS. G. L. N. Syn. Hep. p. 192 (1844). 



Plants small, semi-parasitic. Stems prostrate, radiculose, 

 simple or furcate, rarely with one or two sublateral branches. 

 Leaves succubous, alternate, subquadrate, bifid, upper sometimes 

 trifid, quite entire, ^or here and there dentate ; cells medium size. 

 Stipules absent. LiHorescence dioicous. Bracts $ 1-2 pairs, 

 large, plurilobate, undulato-crispate. Pistillidia 10-22, Mar- 

 supium terminal, seated at right angles with the stem, short, 

 bulbous, obovato-globose, carnose, mouth without or very rarely 

 with subulate scales. Calyptra adnate up the apex with the 

 marsupium, crowned with the sterile pistillidia. Pedicel calceo- 

 late at the base. Capsule oblong. Antheridia terminal. 



Acrobolbus Wilsoni (Te/j//.) Nces. 



Jungermania Wilsoni, Tayl. in schedis. 



Gymnanthe Wilsoni, Tayl. G. L. N. Syn. Hep. p. 102 (1844). 



Acrobolbus Wilsoni, Nees, G. L. N. Syn. Hep. p. 5 (1844). 



Dioicous, csespitose, tufts scattered, small, pea or dark green 

 in colour. Stems creeping, flexuose, colour olive or olive brown 

 near the base, cells 10 x 10, cortical similar to the inner; radi- 

 culose, rootlets abundant, clothing the postical side of the stem, 

 dull white, somewhat coarse. Lmovations postical or sublateral, 

 slender. Fertile stems suddenly accrescent at the apex and 

 bearing much larger erect leaves. Leaves appro:5:imate, semi- 

 vertical, roundish or obovate, divided for one third or even half 

 their length into two acute unequal lobes, the antical somewhat 

 larger, rarely trilobate ; sinus acute ; margin entire or with an 



