the leaf or rather abruptly incurved, prolonged on to the stem,
occasionally obsolete, especially where the flowers are wanting;
cells medium size, equilatero-hexagonal, except below the middle
where they incline to become oblong, rather smooth, walls thin,
under ordinary powers (1 inch or f ) no trigones are observable,
but under the \ inch they are small but distinct; slightly convex
which causes the leaf margin to appear suhcrenulate. Stipules
delicate, rather less than L the size of the leaves, distant, orbicular,
subobtusely bifid to the middle, the segments acute or suhobtuse.
Flowers ? on exceedingly short branchlets, usually with a single
pair of leaves, very rarely longer with 4 pairs, usually simple,
with no subfloral innovations ; very occasionally there is present
a minute microphyllous innovation springing from the base of
the flower. Bracts less than i the size of the leaves, reourvulo-
patent, bilobed to below the middle, lobes slightly complicate
lanceolate, acute or obtuse, the postical a little shorter and only
half the width; bracteole lanceolate, narrowly bifid to a 1 or half
of its length, segments acute, connate with the other bract, or
free. Perianth distinctly emerging from the bracts for more
than double of their length, obpyramidato-pyriform, depressed
at the apex and having a very short slender mucronulate slightly
compressed beak; cells equilatero-hexagonal, pellucid, beautifully
reticulated; 5-keeled—the keels having very deep-like wings—
occasionally towards the apical margin bordered with a single
series of very thin cells. Calyptra half the size, obovate, constricted
at the base so as to appear shortly stipitate. Capsule
globose (not been seen exserted). Androecia very frequently
upon short branches; perigonial bracts 2-5 pairs imbricate,
turgidly oymbiform, bilobed, postical lobe rather smaller. Antheridia
not known.
D im e n s io n s .—Stems f—l-J' inch long and '09 mm. in diameter,
with leaves I 'l mm. wide; leaves, antical lobe '7 mm. x ’45 mm.,
lobule -13 mm., antioal lobe '65 mm. x '55 mm., lobule
•15 mm. x -15 mm., antioal lobe-5 mm. x -35 mm., lobule'15 mm.
X -125 mm.; cells, near middle, -03 mm., '04 mm., '04 mm.
X -03 ram.; stipules '25 mm. x -25 mm., '3 mm. x -8 mm..
•225 mm. x '225 mm.; bract, antioal lobe '4 mm. x -15 mm.
to '2 mm., lobule '35 mm. x -1 mm., antical lobe '6 mm.
X -2 mm., lobule •4 mm. x '15 mm.; bracteole '3 mm. x -15 mm.,
•55 mm. x '275 mm.; perianth '9 mm. x '55 mm., 1' mm.
X -65 mm. ; perigonial araeutnla '85 mm. x -4 mm.
H ab.—Extremely rai'e, the only known station being on
shady rooks below Toro Waterfall, Killarney, near enough to the
stream to be moistened by its spray, except when the water is
very low. I t grows chiefly on Thamnium alopecurmn, accompanied
by Eadula Carringtoni, Saccogyna viticulosa, Metzgeria conjuyata, and
sometimes by Lejeunea diversiloba {G. A. Holt, June 1885), E. S.
O b s.— “ Differs from every other British Lejeunea in the
female flowers being borne on exceedingly short branchlets,
which normally put forth no subfloral innovation such as constantly
exists in all our other species. In size it resembles
L.fiava, or luxuriant L. serpyllifolia, hut usually differs at sight
from both by the pale reddish tinge of the foliage. Even where
the leaves are of the yellow-green of almost ripe limes, dried specimens
speedily assume a rufous hue when moistened. Another
important and unique character is afforded by the large pear-
shaped perianths being so very strongly and sharply keeled that
at first sight they seem broadly 5-winged. The female flowers
often alternate, or are variously mixed up, with male catkins of
about the length of the adjacent leaf, and consisting of from
two to five pairs of oymbiform bracts. Where inflorescences of
both sexes are numerous (as they sometimes are), they render the
stem or branch elegantly pinnulate.
The only species which L. Holtii might be confounded with is
L. jiava (Sw.), which grows near it and in much greater abundance ;
but the former, although nearly equal in size, is far more delicate
and pellucid, and its slight tinge of red is never seen in the
yellow or green foliage of L. flava. Tlie latter, besides the
essential difierence of the perianths being terminal on branches
of various lengths or on the main stem, and invariably putting
forth from their base a leafy innovation or even a pair of opposite
innovations, each of which may in like manner bear an apical