habit, narrow outline of frond, with ascending branches, margin
of stem and branches usually minutely crenulate, are characters
which I consider make it quite worthy of specific rank, and by
them it can be easily distinguished from other British species.
D e sc r ip t io n op P la t e CCI.—Pigs. 1-3. Plants natural size.
4. Frond X 11 (C. & P. n. 63). 5, 6. Cross-section of stem x 24
(Ogwen Valley, W. H. P.). 7, 8. Ditto x 24 (near Penzance,
Mitten & Curnow). 9. Male catkin x 11 (C. & P. n. 63).
4. A n eu ra la tifrons Lindb.
■hmgermania multifida, Schmid. Icon. pi. I l l , pp. 213-21G, exci. synon. et
pp. (1797), Hook. Brit. Ju n g . p. 19, n. 75, pp. (1816).
Riccardia multifida, Gr. <fc Benn. Nat. A rr. Br. PI. p. 684, n. ], pp. (1821).
Aneura palmata, a major, Nees, Nat. Eu r. Leb. I l l , p. 459 (1838), G. L. N. Syn.
Hep. p. 498 (1840).
Aneura latifrons, Lindb. Soc. E. El. Eenn. (1873).
Riccardia latifrons, Lindb. Hep. Hibern. p. 513 (1875).
Monoicous, broadly and densely cæspitose, depressed, small,
pale, bright or brownish-green in colour. Fronds suberect,
irregularly subjiinnate or sub-bipinnate, transverse section planoconvex,
almost the whole breadth 4 or 5 cells thick, the inner
ones large, hyaline, exterior smaller and chlorophyllose, one cell
thick at the entire margin; branches thin, plane, more or less
fastigiate, broadly or oblong-cuueate or sublinear, transverse
section linear, 3 cells thick near the middle ; radiculose, rootlets
few or numerous, hyaline ; stoloniferous, stolons proceeding from
the main stem and branches, radiculose, suhterete and long,
sometimes bearing inflorescence ; gemmiparous, gemmæ roundish,
composed of one or two cells at apex of the branches; texture
opaque when dry, somewhat pellucid when living ; cells of the
antical layer irregular, oblong-rhomboid, slightly or indistinctly
thickened. Inflorescence lateral on the stem or branches, very
often the ? and $ together, rarely $ alone. Perichætial bracts few
Lut large, broadly oval, irregularly lobate, fimbriate. Pistillidia
3-10, short, conical. Calyptra large, ascending, pyriform, clavate
or cylindrical, truncate, white, slightly verrucose, near the base
7 or 8 cells thick, above 3 or 4. Pedicel hyaline, somewhat
thick. Capsule oval or elliptical, brown, dividing to the base
into 4 valves, which are elliptical, when dry convolute, reflexed,
composed of two layers of cells, inner small. Elaters short, somewhat
obtuse, unispiral, spiral threads brown. Spores globose,
greenish-brown. Andrcecia narrowly oblong, base narrow and
shortly stipitate, base and postical side slightly radiculose; antheridia
biseriate, globose, hyaline, very shortly stipitate.
Emits in Spring.
D im e n s io n s .—Eronds J to J inch long, branohes 4' mm. to
8' mm. long, stem 4' mm. broad x 2' mm. thick, branches of
stem 4' mm. broad x 1’ mm. thick; calyptra 2’—3’ mm. long x
•75-1- mm. thick ; pedicel 4 -7 - mm. long; capsule '9 mm. x '4
mm.; valve '9 mm. x '3 mm.; spores -015-'0175 mm. ; elaters
•225 mm. x '0175 mm.
H a b .—On rotting trees, damp turf or in wet places. Eare.
9. Cotteril Clough, Cheshire, IF. Wilson. 10. Goathland,
M.B.Slater. 16. Moidart, West Inverness, ascending to 1400 ft.,
S. M. Macvicar.
I. Killarney, Dr. Carrington and others.
Found on the Continent and in North America.
O b s .—A species previously confounded either with A. multifida
or A. palmata until the late Prof. Liudberg recognised it as
distinct from both. I t is abundantly distinct from what was
considered a variety of A. nndtifida (A. ambrosioides) and from
A. palmata; from typical A. muUifiida it is distinguished by its
relatively thicker and rounder stems, with more irregular and
broader branches, and the more tuberculate calyptra.
D e s c r ip t io n o p P la te CCII.—Fig. 1. Plant natural size
(Hooker). 2. Frond magnified (ditto). 3. Portion of frond
magnified (ditto). 4. Frond x 24 (G. & E. 493). 5. Crossseotion
of stem X 85 (ditto). 6. Cross-seotion of branch x 85
(ditto). 7. Calyptra x 16 (Nr. Goathland, M. B. Slater).
8. Capsule x 24 (ditto).