74 HEPATICjE. 



antical view x G4. 7. Ditto, postical view, x 64. 8. Portion of 

 leaf X 290. 9. Perianth x 31. 10. Portion of male stem x 31 

 (Tore Cascade, G. A. Holt). 



5. Radula aquilegia, Taylor. 



Jungerma7iia aquilegia, Tayl. Trans. Bot. Edin. vol. xi. p. 115-117 (1845). 



Radula aquilegia, Tayl. G. L. N. Syn. Hep. p. 260 (1844). 



Jungermania complanata, var. h. minor. Hook. Brit. Jung. t. 81, f. 17 (1816). 



Dioicous, broadly and shallowy ciespitose, medium to largisli 

 in size, olive- brown in colour. Stems prostrate, irregularly pin- 

 nate or subpinnate, branches often at nearly right angles to the 

 stem; cortical cells 18-20 brown, inner pellucid, 6 cells in 

 diameter. Leaves contiguous or imbricate, distichous, patent- 

 divergent to patent, 60°, unequally bilobed, antical lobe convex, 

 quite entire, obovate or semi-rotund, apex rotundate, crossing the 

 stem, often inflexed, postical lobe about 4 to 5 times smaller, sub- 

 quadrate or oblong-quadrate, remarkably involute, tumid at the 

 base, free upper margin appressed to the antical lobe, apex acute 

 or obtusate, margin nearest the stem covering it to nearly the 

 middle ; cells small, walls thick, angles thickened, sometimes 

 showing trigones. Flowers ? terminal on long lateral branches 

 with one or two innovations produced from below. Bracts about 

 the same size as the largest leaves or slightly larger, unequally 

 bilobed, antical lobe similar in shape to stem leaves, postical lobe 

 about half the size of antical, subquadrate, apex obtuse or rotun- 

 date, plane. Perianth projecting nearly two-thirds beyond the 

 bracts, elongate-obconical, compressed, mouth wide, truncate, quite 

 entire. JMale plants smaller ; perigonial bracts on main stem or on 

 middle or end of lateral branches, closely imbricate, parallel with 

 the stem or erect, smaller than the stem leaves, base rotundate, 

 pendant below its insertion on the stem, unequally bilobed, antical 

 lobe oblong-oval, convex, postical lobe about half the size, oval, 

 much swollen ; antheridia single, large, subspherical. 



Dimensions. — Stem 1 to 2 inches long, with leaves 1-5 mm. 

 wide ; diameter of stem "l to "15 mm. ; leaves, antical lobe *8 mm, 



