3. Jungermania riparia , Taylor.
Jungermania riparia, Tayl. Ann. and Mag. Nat. Hist. August (1843). Spruce
in Phyt. March (1843).
Jungeo'mania tristis, Nees Nat. Eur. Leb. H , p. 461 (183G).
Jimgei'mania pumila, var. notha. G. et R. n. 396.
Aplozia tristis, Dum. Hep. Eu r. p. 63 (1874).
Aplozia riparia, Dum. Hep. Eur. p. 65 (1874).
Dioicous, cæspitose, flagelliferous, small, pale to dant olive-
green colour. Stems creeping or suberect, simple or branched,
flagella frequent, postical, branches lateral-subpostioal, arising
from the postical side of the leaf axil, or frequently from base of
qrerianth ; radiculose, rootlets ascending to apex of stem, whitish,
somewhat thick. Leaves imbrioate or approximate, alternate,
obliquely inserted, horizontal, spreading, broadly ovate, oval,
oblong-ovate or orbicular ; where the branches arise the leaves are
sometimes (but very rarely) small, and acutely bifid, on sterile
stems decreasing in size towards the base and apex ; texture somewhat
delicate, cells smallish to medium size, 4-, 5- and 6-sided,
quadrate or elongate, walls firm, no trigones or thickened angles.
Stipules absent. Bracts similar to leaves, usually broadly ovate,
spreading. No bracteole. Perianth projecting about f beyond
the bracts, fusiform or oblong-ovate, below smooth, slightly
frontally compressed, with a somewhat deep, antical lurrow,
bordered by two distinct folds, near apex with from 5 to 8 folds,
mouth contracted, laciniate. Perigonial stems small, perigonial
bracts at the middle or terminal, erect, imbricate, complicate,
ventricose, smaller but proportionately broader than the stem
leaves ; antheridia oval, single.
Dimensions.—Stems from J to 1 inch long, T mm., T5 mm.,
■2 mm. diam. ; leaves 1'3 mm. long x 1'2 mm. broad, 1'2 mm.
X IT mm., IT mm. x '7 mm., '9 mm. x '7 mm., '8 mm. x Tmm. ;
cells '04 mm. x 025 mm., '04 mm. x '02 mm., '03 mm. x '025 mm.,
■025 mm. X '02 mm.; bracts 1'5 mm. x 1'25 mm., 1'4 mm.
X 1'5 mm.; perianth 2'4 mm. long x '75 mm. broad, '2 mm.
X '75 mm., 1'75 mm. x '75 mm. ; perigonial bract '8 mm. long
X '7 mm. broad, '8 mm. x '6 mm. ; antheridia '125 mm. x
■1 mm.
H ab.—Growing in depressed tufts on wet or damp rocks by
the side of streams and in shady places. Somewhat rare, more
frequent in limestone districts.
1. Near St. Ives, West Cornwall, Mitten fl Curnow. 5. Boulder
near Seokley Wood ; Stream near Flash ; Dove Dale, Stafibrdshire,
,I. E. Bagnall. 7. Glyder Vawr, Carnarvonshire, IF .// . P . Tyn-y-
Groes, Merionethshire, Br. Carrington fl JF. I I P . 8. Millers
Dale, Derbyshire, A. V. 7*/^. 9. Bamford Wood, Lane., G ./ . TToft-
Marple, Cheshire, G. A. Holt. 10. Wharfdale, Dr. Spruce.
Dr. Carrington. Horton, J. Whitehead. Saltersgate Beck,
M .B Slater. Inflehovo , JF. JFest. Deni, Dr. Carrington. Clapdale.
Dr. Cairington. Ingleton, W. JFest, JF. H. P. Gordale,
Dr. Carrington. Baildon, JF. JFest. Sheddon Clough, J. Nowell.
12. Levens Park; on wet limestone rocks, Brightseer, Kentmere
Plantation. Whitbarrow, Westmorland, G. Stabler. Helvellyn,
Beo. C. II. Binstead. Patterdale, Westmorland, Dr. Carnnglon
IF^ 77 p, Borrowdale, Cumberland, Dr. Carrington fl JF. II. 1 .
13. The Glen; Holme Glen, Kirkcudbright, J. McAndrew.
15, 16. Common among wet rocks and sides of streams, ascends
to 1700 ft., Moidart, West Inverness, S. M. Macvicar.
I. Kerry, Dr. Taylor. Tore Cascade, Killarney, Dr. Carrington.
Brandon, Co. Kerry, Dr. D. Moore. Enniscona, Co. Cork,
I. Carroll. Loch Bray and near Woodenbridge, Co. Wicklow,
Dr. D. Moore. Benbulben, Co. Sligo, Dr. D. Moore. Eathlin
Island, S. A. Stewart.
Found on the Continent and in North America.
Obs.— This is a species which assumes many forms, varying
extremely in size and in shape of leaves, the perianth varying also
according to its being more or less imperfect. Some of the acute
Continental botanists have attempted to separate and describe
some of the forms, but, from the study of an extensive collection,
I have come to the conclusion that all the differences of size and
shape depend upon locality only. I t is often confused witli Jmiger-
mania pmnilu, from which it is distinguished by being dioicous