7. Eocks below Llyn Ogwen, Carnarvonshire, Dr.
and if. IT. P. 12. Eosthwaite, Cumberland, Dr. Carrington and
IF. II. P. Seathwaite, Cumberland, ■!. B. Byrom and W. II. P. 16.
Moidart, West Inverness, 8. M. Macvicar. I. Cromaglown, Dr.
Taylor, Dr. Spruce, Dr. Carrington, Dr. Moore, Prof. Lindberg,
and others. Glenariff, Co. Antrim, Bevs. Lett and Waddell.
O b s .—This is one of the smallest and most beautiful of the
British Hepaticæ ; single plants being scarcely visible to the
naked eye. Erom Lej. minutissima (Sm.), which is also without
stipules, it is distinguished by its more distant, spreading,
narrower leaves, which are also more papillose and pellucid.
Lej. calcarea, Libert, and Lej. Bossettiana, Massai., are larger,
coarser species, with more erect leaves, which are distinctly
echinate.
From all other British Lejeuneoe it is distinguished by the
absence of stipules.
D escription of P late XIX.—Pig. 1. Plants natural size. 2.
Portion of stem, antical view x 85 (Rocks, Ogwen, W. H. P.) 3.
Ditto, postical view x 64 (ditto). 4, 5. Leaves, postical view x 85
(ditto). 6. Leaf (ditto) x 64 (Herb. Tayl.). 7, 8. Leaves,
antioal view x 64 (ditto). 9. Keel of leaf x 290 (Seathwaite,
W. H. P.) 10, 11. Portions of leaf x 290 (ditto). 12. Bract
x 64 (Glenariff, Lett & Waddell). 13. Perianth x 64 (ditto).
14. Lejeunea calyptrifolia {Hook.), Dum.
Jungermania calyptrifolia, Hook. Brit. Jung. t. 43 (1816).
Lejeunea calyptrifolia, Dum. Comm. p. I l l (1822).
Calura calyptrifolia, Dum. Keoueil, p. 12 (1835).
Dioicous (?), cæspitulose, minute, pale yellowish-green. Stems
creeping, slightly and irregularly branched, branches procumbent
or suberect ; filiform, flexuose ; radiculose, rootlets extremely
minute, pellucid. Leaves closely placed, hifarious, horizontal,
patent or erect, largest at the base of the plant, gradually
lessening to the apex, unequally bilobed, antical lobe oalyptri-
form, rostrate oorniculate, apex incurved and acute, narrowed at
the base, but with a semi-orbicular or broadly oval convolute
wing, above which the margin is slightly incurved, the fold
gradually increasing in size until near the apex, where another
erect horseshoe-shaped lobe is observed, which is of an extremely
delicate texture and is enclosed in the tubular portion of the
antioal lobe ; postical lobe about three times smaller than the
antical, oval or subquadrate with rounded corners, convolute;
texture delicate, cells smallish, elongate, 4-, 5-, and G-angled, walls
thin, very slightly thickened, trigones absent. Stipules at the
base of each leaf, plane, appressed to the stem or a little patent,
oblong-ouneate, bipartite or deeply (to two-thirds) bifid, segments
patulous, linear-subulate, 3 to 4 cells wide at their base. Female
flowers lateral ; bracts 2, 3 pairs, minute, erect and closely appressed
to the perianth, subquadrate or oval, apex retuse, emarginate,
entire or irregular. Perianth j-elatively large, almost as long as
the leaves, projecting three-fourths beyond the bracts, oblong,
attenuated at the base, widening towards the apex, obtusely
5-angled, angles furnished with one or two horns ; similar horns
are found on other parts of the upper portion of the perianth,
apex depressed or flat, mouth closed at first, afterwards sliglitly
opened, contracted, margin irregular. Calyptra pyriform, ’’composed
of thicker and smaller cells than the perianth. Capsule
oval. Spores minute. Androecia not known.
D imensions. Stems inch long; leaves, antical lobe 1'25
mm. x -35 mm., postical ’5 mm. x '2 mm., antical 1'5 mm. x '45
mm., postical '5 mm. x '25 mm., upper inner lobe ’3 mm.x '15
mm., basal lobe '3 mm. x '225 mm., '3 mm. x ’25 mm. ; cells
■025 mm. x ^025 mm,, ^02 mm. x ^035 mm., ^02 mm. x ^04 rnm. ;
stipules ^25 mm. x ^15 mm. at the middle, segments -175 mm. ;
bracts ^45 mm. x '35 mm., ^45 mm, x ■S mm., ^45 ram. x ^25 mm. ;
perianth !■ mm. x -4 rnm,, -9 mm. x ^4 mm. ; calyptra ■fl mm. x
■35 mm. ; capsule '375 mm. x '2 mm. ; spores ■01 inm.
Hab.—In minute, pale yellowish-green tufts, on rocks,
trees, or furze bushes. Extremely rare. 1. Trevaylor, Cornwall’
J. Balfs, W. Curnow.. '7. Tyn-y-Groes, Merionethshire, Holt and
Wild. 12. Lodore, Cumberland, C. Lyell and W. II. P. Stone-
thwaite, Cumberland, J. B. Byrom and W. II. P. 16. Moidart,