antieal view x 64. 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.
Jimgea-mania 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 cæspitose, medium to largish
in size, olive-brown in colour. Stems prostrate, irregularly pinnate
or subpinnate, branches often at nearly right angles to the
stem ; cortical cells 1 8 -2 0 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 rotundate,
plane. Perianth projecting nearly two-thirds beyond the
bracts, elongate-obconical, compressed, mouth wide, truncate, quite
entire. Male 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.
D imensions.—Stem 1 to 2 inches long, with leaves 1'5 mm.
wide ; diameter of stem T to T5 mm. ; leaves, antioal lobe '8 mm,
X '65 ram., postical lobe '45 mm. x '3 mm., antical lobe 1' mm. x
'8 mm., postical '6 mm. x '4 mm., antical '9 mm. x '75 mm., postical
’4 mm. X '35 mm., antioal ’9 mm. x '8 mm., postical '4 mm.
X'3 mm.; cells ’02 mm.; bract, antioaf lobe 1' mm. x '9 mm.,
postical '7 mm. x '4 mm. ; perianth 2‘ mm. x 1’ mm. wide at the
mouth, perigonial bracts, antical lobe '6 mm. x '3 mm., postieal
'4 mm. X '3 mm., antical '7 mm. x ’3 mm., postical ’4 mm. x
•3 min.; antheridia '2 mm.
H ab.—On wet rocks, very closely attached. E a re ; fertile
plants extremely so.
7. Tyn-y-Groes, Merionethshire, April 1876, IF. II. P .; 1885
G. A. Holt (cum fr.). Cwm Idwal, Carnarvonshire, W. I I P.
Llanberis, Carnarvonshire, J. Cash and W. II. P. 12. Grasmere,
Westmorland, Rev. C. H. Binstead. Lodore, Cumberland,
W. II. P. Stonetliwaite, Cumberland, J. R. Byrom and IF. H. P.
16. Moidart, West Inverness, S. M. Macvicar (cum per). I. Near
Bantry, Miss Hutchins. Killarney, Br. Carrington (cum per.).
Glena, Prof. Lindberg, Knockavohila, Br. Taylor. Killarney,
Dr. Moore, &c. Blackstair, Slieve Donard, Co. Down, Rev. C. II.
Waddell.
O bs.—Distinguished from Radula complanata (L.) by its
inflorescence and olive-brown colour; from Radula Carringtoni,
Jack, see notes under that species.
It is easily recognised by the swollen base of its leaves, the
perigonial bracts being remarkably tumid.
Radula phgsoloba, Mont., from Auckland Island, is a different
species.
D e sc r ip t io n oe P la t e XXV.—Fig. 1. Plant natural size.
2. Portion of stem, antical view x 24 (C. & P. n. 43). 3-7.
Leaves x 24 (Ireland, Taylor). 8. Portion of leaf x 290 (ditto).
9. Perianth with bract x 16 (ditto). 10. Portion of male stem,
postical view x 24 (C. & P. n. 43). 11, 12. Perigonial bracts
X 24 (ditto).