6. Radula Carringtonii, Jack.
Hadmla Carringtonii, Jack, in “ Flora,” p. 385 (1881).
Eadula aquilegia, Tayl. var. tnajor, Carrington, Trans. Bot. Soc. Bdin, vü, p. 455
(1803).
Dioicous, closely but shallowly cæspitose, medium to largish
in size, pale or olive-brown colour. Stems closely imbricate, prostrate,
irregularly bipinnate, moderately'firm, cortical cells similar
to the inner, about SO, inner 5 x 8 , with brownish walls ; branches
alternate, somewhat ascending. Leaves slightly imbricate or
approximate, patent-divergent to patent 70°-50°, unequally bilobed,
margin quite entire ; antical lobe plane or very slightly convex,
rotund or subreniforin, crossing the stem; postical lobe
smaller, quadrate or trapeziform, outer angle acute, inner margin
reaching to about the middle of the stem, plane, appressed to the
antioal lobe ; texture thin ; cells smallish, hexagonal, walls firm,
without trigones. Flowers ¥ terminal on short lateral branchlets,
produced from the pinnæ, always subtended by an innovation.
Bracts rather larger than the leaves, unequally bilobed, antical lobe
turbinate to oblong-oval, apex rotundate, inflexed, postical lobe,
about half the size, somewhat , similar in shape, apex rotundate.
Archegonia 7, 8. Perianth (young) compresso-oampannlate,
bilabiate, lips retuse. Male plant smaller, irregularly pinnate,
branches alternate, short ; androecia on short catkins, produced
from main stem ; perigonial bracts 5 -1 0 pairs, closely imbricate,
erect, turgid, bilobed to about A or 1, antioal lobe oblong-oval,
postical rather shorter, oval ; antheridia small, spherical, bearers
long.
D im e n s io n s .— Stems 1 to 2 inches long, with leaves 2' mm. to
2'5 mm. wide, diameter o f stem ’15 mm. to ’2 mm., leaves, antical
lobe 1'2 mm. x 1' mm., postical ’55 mm. x '5 mm., antical 1'2 mm.
X '9 mm., postical ’55 mm. x '4 mm., antical 1'5 mm. x I ’l mm.,
postical -7 mm. x -5 mm., antioal I ’l mm. x '8 mm., postical
■45 mm. x -35 mm. ; cells '03 mm. x '0225 mm., '0275 mm. x
•025 mm., '0275 mm. x -0275 mm., '0225 mm. x '02 mm. ; bracts,
antical lobe 1'25 mm. x '9 mm., postical 1- mm. x '6 mm. ; male
ramuli 1^^ mm. to 3 mm. long, perigonial bracts, antical lobe
•7 mm. X '4 mm., postical '6 mm. x '85 mm. ; antheridia ’1 mm.
diameter, bearer '15 mm. long.
H ab.—In wide closely imbricated patches on rocks or trees,
South of Ireland, Tore Woods; Cromaglown; Glena; Tomes
Woods, Killarney, Dr. Carrington, June 1861. Eocks near Toro
Cascade, Killarney (male plant), G. E. Hunt, April 1872.
O’Sullivan’s Cascade ; Giena; Cromaglown, Killarney, Prof. 8. 0.
Lindberg, 1873. Killarney, Dr. D. Moore. Damp shady rooks,
Toro Cascade, Stewart and Holt (male plants), June 1885. Aunis-
caul, Co. Kerry, D. McArdle (cum per.), June 1898. 16. Moidart,
West Inverness, S. M. Macvicar.
Found oil the Continent (Norway), B. Kaalaas. Extremely rare.
Obs. — This, the liandsomest of our native Badula, was
deservedly named by Jack in honour of its original discoverer,
Dr. Carrington, who collected it in the South of Ireland in 1861,
and thought it was a distinct species, although he liad not seen
either the male plant or perfect perianths, but deferring to the
opinion of some of his friends, lie published it as var. major of
Radula aquilegia, Taylor ; since then, the male plant along with
more perfect female plants have been met with, which clearly show
its specific difference from the latter.
I t is distinguished from R. aquilegia hy its larger size, rather
paler brown colour, which is golden brown by transmitted light,
leaves with less convex antical lolies ; postical lobe relatively larger,
plane, appressed to the antical lobe, not turgid at the base, free
angle more acute, texture thinner and more translucent; andrcecia
on short catkins proceeding from the main stem. From any of
the other British Radula; it is abundantly distinct.
D escription op P late XXVI.—Fig. 1. Plant, female, natural
size. 2. Ditto, male. 3. Portion of stem, postical view x 24
(Killarney, Dr. D. Moore). 4, Ditto, with male spike x 24 (Toro
Waterfall, Holt and Stewart). 5-7. Leaves x 24 (Killarney, Dr.
Carrington). 8. Portion of leaf x 290 (Toro Waterfall, G. E.
Hunt). 9. Bracts x 24 (Killarney, Dr. Carrington). 10, 11.
Perigonial bracts x 24 (Toro Waterflill, Holt and Stewart).