8-plicate to almost the base, composed of a single layer of cells,
about 250 round, mouth slightly contracted, laciniate-ciliate.
Perigonial bracts usuallj' situated at the middle of the stem, little
different from the ordinary ; antheridia 2 at the base, oval.
Fruits April, May.
Dimensions.— Stems to J inch long, diameter '25 mm. ;
upper leaves, antical lobe IT mm. x '4 mm., postical lobe 1'6 mm.
x '6 mm. ; lower leaves, antioal lobe '8 mm. x '4 mm., postical
IT mm. X '4 mm., antical 1' mm. x -35 mm., postical IT mm.
X -4 mm. ; cells '025 mm., -03 mm. ; bracts 1 7 5 mm. x 1 ’25 mm.,
1'6 mm. X 1'25 mm., segments IT mm., '75 mm., "5 mm. ;
perianth 2 ’ mm. x IT m m .,laciniæ of mouth ’5 mm. long ; pistillidia
T5 mm. x '05 mra. ; perigonial bracts, antical lobe ‘9 mm.
X '3 mm., postical IT mm. x '5 mm.
H a b .— Grows in crevices of rooks and on the earth in shady,
usually subalpine situations. Rare.
1. Dartmoor, E. AL Holmes. 7. Cwm By chan, Merionethshire,
E. George, E. M. Holmes. Tyn-y-Groes, Merionethshire,
C. J. Wild. 9. Kinder Scout, Derbyshire, J. Whitehead fl
G. A. Holt. 10, 12. Staveley; Mardale; Little Langdale,
Westmorland, G. Stabler. Isle of Man, G. A. Holt. “ Found
many years since in Scotland by Mr. Dickson ” (Hook. Brit.
Jung. 1816). 13. New Galloway, J. McAndrew. 15. Kinnordy,
C. Lgell. Strachan, J. Sim. 16. Moidart, West Inverness, S. AL.
Macvicar.
I. Near Dublin, Br. Taylor. Shauslieve, Mourne Mts.,
Bev. H. W. Lett, 1898.
Found on the Continent and in North America.
O b s .— Dr. Hooker wrote in his “ Brit. Jung.” : “ There are few
naturalists to whom Cryptogamie botany is more indebted than
to Mr. Dickson. In the genus Jungermania his numerous
additions to the list of British species are well known. The
present is one of many collected since the publication of the
fourth fasciculus of his Plantæ Cryptogamicce in the Highland
mountains of Scotland, which he kindly communicated to me ;
and I have great pleasure in distinguishing it by his name.”
Prof. Lindberg states in “ Muso. Scand.” p. 7 that Dickson’s
original specimens otJung. ovata PI. Crypt. Brit. Fasoi, 3, p. 11,
t. 8, fig. 6 (1793) are identical, but evidently, from the above note
hy Dr. Hooker, neither he nor Dickson considered them the same,
and as the description of Dickson is short and unsatisfactorj',
and the figure poor, I retain Hooker’s name. Diplophyllum
DicJcsoni is a very distinct species, no other British one
approaching it. Diplophyllum aryenteum (Tayl.), Spruoe, a North
American species, is its nearest congener, but is distinguished by
its serrate leaves, 12-plicate perianth, &c.
D escription oe P late C.—Fig. 1. Plants natural size.
2. Portion of stem x 16 (Dartmoor, E. M. Holmes). 3. Portion
of fertile stem x 16 (New Galloway, McAndrew). 4, 5. Upper
leaves x 24 (ditto). 6, 7. Leaves x 24 (Dartmoor, Holmes).
8. Portion of leaf x 290 (New Galloway, McAndrew).
9, 10. Bracts x 16 (ditto). 11. Perianth x 24 (Dartmoor,
Holmes). 12. Cross-section of perianth, upper half x 24 (ditto).
13. Portion of mouth of perianth x 31 (ditto). 14. Ditto x 85
(New Galloway, McAndrew). 15. Pistillidia x 85 (ditto)
16, 17. Perigonial bracts x 24 (Dartmoor, Holmes).
Subtribe V I. E P IG O N EA N TH EÆ .
Genus 22. LOPHOCODEA, Dum.
Jungermania, Mich. Nov. pi. gen. p. 8 (1729); L. Sp. pi. eel. 1, 2, p. 1182
'(1753).
Jungermanice sect. Lophocolea, Dum. Syll. p. 59 (1831).
Lophooolea, Dum. Beoneil, p. 17 (1835).
Plants large, very rarely small or minute, soft and flaccid,
green or whitish-green, when dry usually yellowish, with an unpleasant
smell, rarely fragrant, growing more or less in shallow
spreading layers. Stems creeping, with long whitish rootlets,
equally leaved, vaguely branched, rarely subpinnate, moderately
thick, in the more robust species about 7 cells in diameter; cells
small, cortical quadrate or oblong, inner linear-prismatic. Branohes