concave, sliglitly undulate, subacinioiform or oblong, obtuse or
sometimes slightly aqiioulate; cells small, quadrate, guttulate, near
base in postical lobe elongate, cell-walls thick, no trigones. Bracts
somewhat similar to the leaves, but larger. Perianth projecting
from about ^ to -J- beyond tbe bracts, terminal, obovate or
oblong-ovate, upper portion 5-plioate, mouth contracted, laciniate,
irregularly dentate or denticulate. Capsule oval; spores reddish-
brown ; elaters bispiral, same colour. Antheridia situated in the
base of the bracts or on branches proceeding from base of perianth,
small, one or two in each bract.
Fruits April, May.
Dimensions.—Stems about ^ inch long, diameter T5 mm. to
T75 mm. ; upper leaves, antioal lobe '6 mm. x '4 mra., postical
lobe 1' mra. x '5 mm., antical '5 mm. x A mm., postical A mm.
X -4 mm. ; lower leaves, antical lobe '4 mm. x '25 mm., postical
'7 mm. X A mm.; cells '015 mm. x '02 mm., '025 mm., basal cells
-05 mm. X '02 mm., '04 mm. x '02 mm., '03 mm. x '02 mm.;
bracts, antical lobe 1' mm. x '6 mm,, postical 1'3 mm. x '7 mm. ;
perianth 2' min. x 1' mm.; capsule '9 mm. x '6 mm.; spores
-01 mm. diam.; elaters '1 mm. x '01 mm. ; perigonial bracts,
antical lobe '5 mm. x '4 mm., postical '9 mm, x '5 mm.
Hab.—Grows on shady banks and in old quarries, in company
with Scapania rosacea and Jang, hicrenata. Bare.
7. Tyn-y-Groes, Merionethshire, G. A. Holt, Maj' 1885.
9. Delamere, Cheshire, Wilson fl Carrington. 10, 11. Near
Heddon on the Wall, Northumberland, Mr. Thornhill. 15. Gate-
side, Strachan, Perthshire, J. Sim, June 1879. 16. Glen Pinnan,
Dr. Carrington, July 1876. Moidart, West Inverness, A. AT. Macvicar
fl W. H. P., 1899.
I. Near Bantry, Co. Cork, Miss Hutchins. Near Dunkerron,
Co. Kerry, Dr. Taglor) Dunsoome’s Wood, near Cork, W.
Wilson.
Generally distributed on the Continent. North America.
Obs.—Although Dr. Hooker had an impression that the species
was dioicous. it is truly paroicous or monoicous, and this character,
along witli its small size, distinguishes it from any form of Diplophyllum
taxifolium, for which it has been mistaken by Austin and
others.
D escription op P late XCIX.—Fig. 1. Plants natural size
(Eng. Bot. 2511). 2. Portion of stem x 24 (Glen Finnan,
Dr. Carrington). 3. Portion of stem x 31 (ditto). 4. Portion
of fertile stem x 24 (Delamere, Wilson & Carrington). 5. Upper
leaf X 24 (Tyn-y-Groes, Holt). 6. Upper leaf x 24 (Hb. Tayl).
7, 8. Lower leaves flattened out x 24 (ditto). 9. Portion of leaf
X 290 (Delamere, W. & C.). 10. Portion of leaf, near base
X 290 (ditto). 11,12. Bracts x 24 (Hb. Tayl.). 13. Perianth
X 24 (ditto). 14. Portion of mouth of perianth x 85 (ditto).
15. Spores x 290 (ditto). 16. Perigonial bract x 24 (Tyn-y-
Groes, Holt).
4. Diplophyllum Dicksoni (Hook.), Dum.
.Jungermania ovata, Dickis. PI. Crypt. Brit. iii. p. 11, t. 8, f. 6 (1793);? Lindb.
Musci Scand. p. 7 (1879).
Jimgermania Dicksoni, Hook. Brit. Ju n g . t. 48 (1816).
Diplophyllum Dicksoni, Dum. Recueil, p. 16 (1835).
Dioicous, growing in loose patches or amongst mosses, small,
of a pale yellowish-brown colour. Stems simple or rarely
branched, innovant branohes arising from base of bracts,
apparently subpostioal; radiculose, rootlets ascending to apex of
stems, hyaline, long, delicate, stem slightly channelled antically,
cortical cells about 40, more distinct than the inner, walls firmer,
inner soft, and somewhat indistinct. Leaves transversely inserted
or slightly ascending, antioal lobe more erect, sometimes erect to
erect-patent, equitant, contiguous or imbricate, to below the
middle unequally bilobed, complicate, lobes lanceolate, acuminate,
antical lobe smaller than the postical, margin entire, upper leaves
slightly serrulate; cells smallish to medium, snbquadrate or
roundish, filled with nucleate bodies, oell-walls delicate, hyaline,
trigones small. Bracts ovate, bifid to about the middle, segments
lanceolate acuminate or obtuse, margin serrate. Perianth projecting
about to beyond the bracts, oval fusiform, deeply