I ;
Mi
•05 mm. X •OS mm.; bracts !• mm. x -35 ram., seg. ^6 mm., -8 mm.,
T2 mm. x •35 mra., seg. •G mm., -9 mm., bracteole ^85 mm. x
•4 mm., seg. -6 mm., 1- mm. x ^4 mm.; pistillidia -125 mm.x
•04 mm.; perigonial bract •275 mm. x ^2 mm.; explánate, seg.
•075 mm.
H ab.—Among Playiothecium Borrerianmn, Spruce, on banks,
Killarney, Dr. David Wloore, 1865. Killarney, Air. Reginald W.
Scully, 1889.
Obs.— Specimens were sent by Dr. David Moore to Dr.
Carrington in 1865 as Jimy. connivens, who, recognising it as
distinct from that species, brought it under the notice of Dr.
Gottsche of Altona. He referred it doubtfully to .Tuny, crassifolia,
Lindenb. & Gottsob.. It would probably have remained unrecorded
until fertile plants were found, had not a fragment of Moore’s
specimen been forwarded to Dr. Spruce, who at once referred it to
Cephalozia crassifolia Iff. & G.); since then he received further
specimens from Killarney, collected in 1889 by Mr. Reginald
Scully, and wrote to me some time before his death, that he
was inclined to consider the species distinct, and proqiosed the
MS. name of Cephalozia hibernica. I feel doubtful until fertile
specimens have been found whether it can be separated from
Ceph. crassifolia. In any case it is a distinct addition to our
Flora.
There is a strong resemblance in habit, texture, and structure
of this plant to the genus Zoopsis, its plano-convex stem, with the
band of small cells running through it, giving it a vertebrate
appearance, its remarkably plane leaves, the cells of which cross
the stem unaltered. I t is not difficult to trace the transition from
the apparent simple ribbon-like frond of Zoopisis aryentea (Tayl.)
through Z. setulosa Leitg., with its claw-like leaves, to the more
perfect leaf form of Z. Leiiyebiaua C. & P. and so to the distinctly
foliose Cephalozia crassifolia and Ceph. hibernica.
I t is distinguished from its nearest ally, Ceph. connivens
(Dicks.) by its dioicous inflorescence, the longer segments of its
leaves, which are composed of 2-4 single long cells, and other
characters.
I am indebted to the late Dr. Carrington for assistance in the
preparation of this description.
D escription or P late LIX.—Fig. 1. Plant natural size.
2. Portion of stem, antical view x 24 (Killarney, Dr. Moore).
3. Cross-section of stem x 85 (ditto). 4-6. Leaves x 64 (ditto).
7. Branch leaf x 85 (Killarney, R. Scully). 8. Portiou of
leaf x 290 (Killarney, Dr. Moore). 9. Portion of segment of
leaf x 290 (ditto). 10, 11. Bracts x 31 (ditto). 12, 13. Bracteoles
X 31 (ditto). 14. Portion of the month of an immature
perianth x 31 (ditto). 15. Portion of male stem, antioal
view x 31 (Killarney, R. Scully). 16. Perigonial bract x 85
(ditto).
7. Cephalozia connivens (Dicks.).
Jumjermcmia connivens, Dickson, PI. crypt. Brit. Base. iv. (1801) ; Hooker Brit.
Ju n g . t. 15 (1816) ; Eng. Bot. t. 2436.
Cephalozia connivens (Dicks.), Spruoe, On Ceph., p. 46 (1882).
Blepharostoma connivens, Dum. Recueil, p. 18 (1835); Hep. Eu r. p. 96 (1874).
Monoicous, loosely cæspitose or creeping, flagelliferous, small,
pale green, pellucid, fragile. Stems subramose, subcompressed,
cortical cells about 8, interior moderately large, almost empty ;
radiculose, rootlets plentiful, long, white. Leaves lower and
upqier distinctly smaller, middle larger, subimbricate or approximate,
almost horizontal, insertion sublongitndinai, antical, very
deourrent, obliquely suborbioulate, from ^ to the middle bifid,
sinus obtuse or lunate, segments triangular-acuminate, connivent ;
cells moderately large, quadrate-hexagonal or oblong-quadrate,
almost empty, walls thick, no trigones or thickened angles.
Stipules none. Bracts 3 pairs, the innermost almost twice as
long as the leaves, oval or broadly ovate or irregular in outline,
deeply 3-5-fid (normally twice bifid), segments lanceolate-
subulate, acuminate, margin entire or sub-spinulose ; bracteoles
almost free, deeply bifid, exterior margin 1, 2 teeth. Perianth
projecting, pyriform-fusiform, terete, towards the apex obtusely
trigonous, cells elongate, composed of a single layer, about 60
roundish cells near the middle, these giving the inner and the