species by the presence of a strand of strong, ligneous, narrow,
elongated cells running along the centre of the costa; when
fertile by the short, laciniate bracts, surrounding the erect linear-
cylindrical perianth, which encloses a relatively large calyptra.
D escr iption or P late CXCI.—Pig. 1 and 2. Plants natural
size. 3. Portion of fertile plant x (Hooker). 4. Cross-section
o f frond x 24 (Herb. Austin). 5, 6. Ditto x IG (ditto). 7.
Portion of frond x 290 (ditto). 8. Female flower (braots,
perianth, and calyptra) x . 9. Section of female flower, showing
bract, perianth, pistillidia, and gerraen x . 10. Bract x . 11.
Capsule and portion of pedicel x . 12. Portion of male stem,
showing perigonial bracts and ligneous strand X . 13. Perigonial
bract and antheridium x . 14. Antheridium x (Hooker).
2. P allavicinia hibernica {Hook.), Gr. fl Benn.
I hibernica. Hook. Brit. Ju n g . t. 78, & suppl. t. 4 (1810).
Pallavicinia hibernica, Gr. & Benn. Nat. A rr. Brit. PI. p. 684 (1821).
Dilaena hibernica, Dum. Comm. bot. p. 114 (1822),
Diplolaena hibernica, Dum. Syll. Ju n g . p. 83, t. 2, f. 21 (1831).
Diplolaena Lyellii, var. hibernica, Nees Nat. Eu r. Leberm. I l l , p. 343 (1833).
Diplomitrion hibernieum, Corda in S turm Deutschl. El fasc ‘>2 p 87 t ->3
(1835). ' ’ ' ’ ' ■
Moerckia hibernica, Gottsche in G. & R. Hep. Eu r. Exsicc. n. 295 (1866)
Delin. Hook. Brit. Ju n g . tab. 78 e t Suppl. tab. 4 ; E k a rt Syn. J u n g Germ
tab. X. fig. 84, et tab. xiii, fig. 116a; Husn. Hep. Gall. pi. xi, fig. 124.
Dioicous, loosely cæspitose, medium to largish in size, odorous,
pale p-een colour. Fronds procumbent, loosely imbricate, oncé
or twice diohotomously furcate, oblong, margin entire, undiilate ;
texture somewhat delicate, cells medium to rather large in size,
quadrate or ohlong-quadrate, walls thick, no trigones, midrib
thick, broader than thick, 20 cells broad x 16 celLs thick,
gradually diminishing in thickness into the lamina, usually with
no ligneous strands, lamina on each side of the midrib 8 to 10
cells wide composed of 2 or 3 layers of cells ; radiculose, rootlets
hyaline, rarely reddish. Female flowers several, produced antically
from the mid-rib ; bracts two, surrounding base of the
perianth to about one-fourth its height, suborbicular, laoiniate-
dentate. Perianth large, oblong-ovate, slightly plicate, unistratose
near the middle, about 130 cells round, near base two or three
cells thick, mouth a little constricted, irregularly and sparselv
dentate. Calyptra half the size. Pistillidia long, about 6.
Capsule dark reddish brown, oblong-ovate, dividing to the base
into 2 or 3 oidentate or entire valves ; spores dark reddish brown,
with numerous irregular ridges, giving them a minutely verruculose
marginal appearance ; elaters very narrow, pale brown. Androecia
produced in scale-like bracts antioally from the mid-rib, perigonial
bracts broadly oval, subconcave, apex irregularly dentate ; antheridia
large, oval spherical.
Pruits about the middle of April.
D im e n s io n s .—Fronds ¿ to 2 inches long, 3’ to 4' mm. broad,
mid-rib '6 mm. broad x '4 mm. thick; cells '04 mm. x -05 mm.,
•03 mm. X -04 mm., -04 mm. x -04 mm.; bract 1- mm. high x
•75 mm. broad; pistillidia ^3 mm. x •075 mm. ; perianth 4' mm. x
•2 mm.; pedicel •175 mm. diam.; valve of capsule £• mm. x
1-25 mm. ; spore's -035 mm. ; elaters '4 mm. x -01 ; perigonial
bracts -75 mm. x -6 mm,, -65 mm. x -5 mm. ; antheridia
•275 mm. x '2 mm.
Hab.—On elevated marshy situations Amongst Sphayna. Very
rare. 15. Catlaw Hills, Kinnordy, Forfar, C. Lyell, 1822.
I. Amongst Sphagnum cuspidatmn and Jungermania emarginata
on the shores of Lough Bray, a very elevated situation near
Dublin, Br. Taylor. D. McArdle, July, 1878.
O b s .—The description is that of the original Jung, hibernica
published by Hooker in his “ British Jung.” ; two other I’orms
have been grouped with it which probably deserve to rank as
distinct species. The type is distinguished from them by its
much larger size, long, slender, slightly undulate fronds in
addition to other characters.
Distinguished from Pallavicinia Lgellii (Hooker) by tlie absence
of a nerve in the midrib, by its strong smell in addition to other
characters.
Var. Wilsoniana, Cottsche {Pallavicinia Wilsoniana (G.),