Borrowdale, Cumberland, 77”. H. P. 13. New Galloway, / McAndrew.
15. Succotb Hill, Arroquhar, A. McKinlay ; Ben Sligott,
C. Hoioie ; Ben Mac Dliui, G. E. Hunt, J. JVhitehead; Glen Clunie,
Aberdeen, J. Wldteliead; Ben Laoigli, T. Rogers. 16. Moidart,
West Inverness, 000 feet, 8. M. Macvicar.
I. Bantry, Miss Ihctclnns ; Aooreagb River near Sneera, Dr.
Taylor ; abundant at Upper Lougb Bray, Br. B. Moore; Luggielaw
and Seven Cburobes, Br. B . Moore ; Connemara, near Kylemore,
Galway, Dr. B. Moore; Kelly’s Glen, Dublin; Killarney,
Br. Carrington; Co. Wicklow, Prof. 8. 0. Lindberg.
Found on the Continent, also in Greenland.
Obs.—This species, being semi-aquatie, sometimes grows to the
length of 4 or 5 inches, and forms in some subalpine rivnlels
large patches over which the water is constantly flowing.
In drier alpine situations a small variety is found, of a deep
purple colou)-, stems J to inch long, simple, leaves orbicular,
closely imbrioate, stipules dentate.
From Nardia scalaris {Schrad.) it is distinguished by its
reniform, closely laterally appressed leaves, which are also
thinner and more delicate, and its large cortical stem cells.
From Jamesoniella Carringtoni {Balf.), Spruce, see notes
under that species.
D escription op P late CLX.— Fig. 1. Plants natural size.
2. Portion of stem x 16 (Ireland, S.O.L.). 3-5. Leaves x 16
(ditto). 6. Portion of leaf x 290 (ditto). 7, 8. Stipules x 24.
(ditto). 9. Stipule x 24 (Cader Idris, W. H. P.). 10, 11.
Longitudinal sections of bracts and periantli (Dr. Gottsche, G. E.
Hep. Eur. 443). 12,13. Perigonial bracts x 16 (Ireland, S.O.L.)
14. Antheridium x 85 (ditto).
4. Nardia scalaris {Schrad.), Gr. fl B.
Jungermania scalaris, Schrad. Syst. Samml. K ry p t. Gew. 2, p. 4 (1797).
Nardia scalaris, Gr. & B. Nat. Arr. Brit. pi. p. 694 (1821).
Mesophylla scalaris, Dum. Comm. Bot. p. 112 (1822).
Alicularia scalaris, Corda in Opiz Nat. p. 653 (1829).
Dioicous, loosely or densely cæspitose, eflagelliferous, small,
pale, or dark to brownish green, rarely reddish in colour. Stems
creeping or suberect, simple or furcate, slightly laterally com-
pre.ssed, cortical cells smaller and darker than the inner, which
are large and distinct, about 9 x 9 cells in diam,; radiculose,
rootlets plentiful, dull white. Leaves distichous, imbricate, suooubous,
ereoto-patent or patent, obliquely inserted, appressed or
spreading, orbicular or rotund, slightly concave, entire or slightly
retuse, lower smaller and distant; texture somewhat thick ; cells
smalhsh, roundish quadrate, walls moderately firm, trigones large,
distinct lumen containing several oil corpuscles. Stipules larg^
and distinct, subulate or triangular-subulate, entire. Involucre
obovate, laterally compressed, composed of two bracts and bracteole
; bracts much larger than the stem leaves, orbicular entire
or emarginate, bracteole triangular-subulate, connate at the lower
half of the bracts. Perianth immersed in the bracts, the lower
half adnate with the innermost bracts, composed of more delicate
cells, conoid, mouth contorted. Capsule oval-spherical. Spores
brown, elaters bi.spiral, brown. Androeoia terminal or on the
middle of stem; perigonial bracts closely imbricate, smaller than
the leaves, ventricose, enclosing 2 roundish oval, small antheridia
Fruits March, April.
D im e n s io n s .— Stems J to 1 inch long, -2 mm. to '25 mm. in
diam., with leaves 1- to 1’5 mm. wide; leaves '6 mm. x '8 mm.,
•7 mm. x -9 mm., 7 mm. x 7 mm,, '6 x 75 mm.; cells '03
mm., -025 mm., '035 mm. '02 mm.; stipules -225 mm. x '125
mm. at the base, '25 mm. x '125 mm., '35 mm. x -075 mm. ;
bracts 1'25 mm. x IT mm. ; bracteole 1' mm. x A mm.; pistillidia
T5 mm. x '075 mm. ; perigonial bracts A mm. x A mm.
A mm. X 7 mm„ A mm. x A m m .; an tiierid ia T1 mm. x 'I
mm., T1 mm. x A8 mm.
HAB.-Grows in loose or dense patches on damp banks, moors,
rocks, or stones; generally distributed 1 to 18. I.
Common on the Continent.
Found in North America.
O bs .— A common species, easily recognised, even when barren
by the presence in the leaf-cells of several oil corpuscles, from any