15 On rooks above Looh Avon, Hr. Greville, 1830; A. Croall
1850; G. Stabler. Ben Laivers, Dr. Stirfon, 1866. Ben Voilioh,
Dr. Stirton, 1869. Ben Laoigh, C. -T. Wild fl G. A. Holt, 1880.
16 Looh Maree, C. Hoivie, 1867. Glen Finnan, Ur. Carnngton.
Moidart, West Inverness. A. 31. 3iacvicar, 1898 ; A 31. 3Iacvicar
fl W. H. P., 1899. Faroe Isles.
Obs.—This very fine, rare, and beautiful species was first
recognised as distinct by Dr. Stirton, who named it in his MSS.
AUcvlaria viridis. , .
Prof. Balfour publislied it as Adelanthus Carrwgfom m the
Trans. Bot. Soc. Ediu. 1870, and I am glad that the memory of
my dear friend sliould be associated with such an unique British
species. . ^ .
From Nardia cowpressa (Hook.), to which it has even been
releo-ated. as a variety, by Prof. Liudberg, it is at once and readily
distinguished by its beautiful cell structure. In N. cowpressa the
cells are more quadrate, with thin walls and small trigones ; the
leaves also are nearly plane, appressed to each other, texture more
delicate, epidermis not polished, and it has a terminal immersed
perianth.
D escription op P late C X X I.-F ig . 1. Plants natural size
2. Portion of stem x 16 (0. & P. n. 233, and following figures).
3, 4. Leaves x 24. 5. Leaf with teeth x 24. 6. Leaf x 16.
7. Portion of leaf margin x 85. 8. Portion of leaf x 290.
9. Stipule x 85. 10. Antheridium.
Genus 31. JUNGERMANIA, L.
.Tungermania, L. Sp. pi. 1131 (1768); Dum. Reouoil, p. 16 (1836).
Plants medium size, rarely very large. Stems simple or
furcate, in a few species repeatedly dichotomous, in several
vaguely ramose, branches (few) lateral, proceeding from the
postical angle of the leaves, true postical branches none or very
rare, hut rooting flagella qoresent in some species. Rootlets
usually pale, in the prostrate species plentiful, in the caispitosoerect
species few or almost wanting. Leaves succubous, rarely
subtransverse, patent, assurgent or laterally accumbent, moderately
broad, in several species entire, in others bilobed, in a few
3-5 lobate or dentate ; margin plane or incurved, never recurved,
almost always quite entire, rarely denticulate ; cells medium size,
rarely small. Stipule.s usually absent, where piresent more or less
small, entire or bifid, rarely subquadrifid. Inflorescence dioicous
or paroicous ; female flowers terminal, fertile rarely innovant,
sterile frequently present on subfloral innovations. Bracts ?,
rarely more than 2-pairs, somewhat similar to the leaves or more
incised, free from the perianth, sometimes connate with themselves.
Pistillidia numerous (8-70). Perianth usually emersed, slightly
compressed laterally, rarely all ecarinate, almost always (at least
above) 3-10-carinate, smooth, rarely rough, never winged; mouth
usually small, quite entire or denticulate, rarely ciliate, sometimes
tubular, sometimes at first closed, afterwards rupturing into lobes,
very rarely bursting on one side. Calyptra pyriform or oval,
delicate, or only towards the base slightly carnose, where are the
free sterile pistillidia. Capsule highly (rarely shortly) exserted,
globose or oblong, rarely cylindrical, 2-5 layers of cells, 4-valved,
valves rarely bifid. Elaters bispiral. Spores minute, smooth or
scaberulous.
Subgenus I. APLOZIA, Dum.
Jungermania, sect, Aplozia, Dum. Syll. Ju n g . Eur. p. 47 (1831).
Aplozia, Dum. Hep. Eur. p. 55 (1874); Scliiffner, Engl, and P ran tl. Pil. Fam.
p. 82 (1893).
Dioicous, paroicous or monoicous, cæspitose, small to medium
in size, green, brown or reddish-brown in colour. Stems creeping
or erect, determinate, simple or slightly branched, often with one
or two innovations proceeding from below the perianth ; usually
radiculose. Leaves succubous, orbicular or ovate, entire or rarely
retuse. Stipules absent (except in J. autumnalis). Bracts similar
to leaves (except in J. autumnalis). Perianth terminal, 3-5, very
rarely 6 and 7 keeled.