W. H. P. 12. Bow Fell, G. Stabler. Borrowdale, W. H. P.
13. Milyea ; North of Black Craig; Ballingear Woods, New
HA\o\TA.y,J.AIcÂiidrew. 15. Jio o h -n a -G a r,H rà ,• Ben Challum,
Breadalbane, A. 0. Black; Ben Voirlioh, Craig-na-Gour, and
Ben Lawers, A. McKinlay; Loch Kandor, Ben MacDhui, G. E.
Hunt. 16. Moidart, West Inverness, S. M. Macvicar.
I. Black Mountains, Dr. Moore.
Found on the Continent.
O b s, Distinguished from M. emarginata (Ehrh.) by ils usually
darker colour, by its never cordate leaves, with segments more
acute. Cesia alpina (Gotts.) has polished leaves of a different
texture.
D escription op P late CLXVI.—Fig. 1. Plants natural size.
2. Fertile stem x 31 (Llanberis, W. H. P.). 3. Male stem x
31 (ditto). 4-8. Leaves x 24 (ïyn-y-Groes, W. H. P.). 9.
Leaf X 31 (Llanberis, W. H. P.). 10. Portion of leaf x 290
(ditto). 11. Sub-braot x 31 (ditto). 12, 13. Bracts with
portions of perianth x 31 (ditto). 14-17. Perigonial bracts x 31
(ditto). 18. Antheridium x 85 (ditto). 19. Spores x 290 (ditto).
4. Marsupella olivácea, Spruce.
, Spruce in “ Rev, Bryol.” p, 97 (1881).
Synoicous and paroicous, cæspitose, small, olive green colour.
Stems rig d , rhizomatous, stolons long, creeping, leafless or
clothed with minute leaves, radiculose, erect, siibsimple, or
innovantly elongate—rarely repeatedly ramose, apices of the
fertile stems clavate, sterile stems filiform-small-leaved. Leaves
small, subimbricate, erect, appressed—upper sometimes subpatent
at the apex at the base deourrent-vaginate, oblong, canaliculate-
concave, hardly suhoarinate, bilobed from i to 1, sinus obtuse,
lobes obtuse, rarely abruptly subaoute; texture thick, opaque,’
cells minute, walls thickened, angles thickened, no trigones, cells
of the upper portion of the leaf and middle subequal, near the
base larger, a little elongate, marginal cells quadrate. Bracts
terminal, fusiform, 3-4 pairs, broadly ovate, canaliculate-concave,
at the apex very shortly to -^) bilobed, lobes incurved,
obtuse, rarely rotundate ; inner bracts twice as large or larger
than the leaves, slightly connate at the base, apex sometimes
divided to J. In the axils of all the bracts are large, stipitate
solitary (rarely two) antheridia, sometimes in the same receptacle
with the pistillidia.. Pistillidia about 5, rarely about 10. Perianth
very variable, sometimes as long as the bracts, oblong, apex
rarely closed and symmetrical, very often cucullate, sometimes
shorter and open at the side, mouth, then plurilaciniate, concrete
from the base to about J high with the bracts, sometimes only at
the base, rarely free. Calyptra smaller, oval-globose, 2 cells
thick, at the base and for a little way up adnate with the
perianth, to above the middle strewn over with 4-9 sterile
pi.stillidia. Capsule oblong-globose, composed of two layers,
inner layer composed of semiannular fibres. Spores brown.
Elaters reddish-brown.
Fruits March, April, May.
D imensions.—Stems -J- to inch long, T mm. diam., with
leaves '4 to '5 mm. wide; leaves A mm. long x '3 mm. broad, seg.
•1 mm., '4 x '3 mm., seg. ’075 mm., -4 x '25 mm., seg. ’075 mm.,
■3 X '2 mrn., seg. '05 ram.,’2 mm. x T5 mm., 'Smra. x ’3 mm.; cells,
near the middle '01 mm., '0125 m m , '01 mm. x ’0125 mra., near
the base '0125 mm.,’01 mra. x '02 mm., '01 x '0125 mm., '015 mm.
x '015 mm.; perigonial bracts A mm. x '45 mm. ; seg. T mra.,
A25 mm. x '4 mm., seg. vl mm.; bracts '65 mm. x '6 mm.; antheridia
T5 mm. x rt mm., bearer A mm. long ; pistillidia '075 mm.
X '035 mm. ; capsule '4 mm. x '325 ram.; pedicel T mm, diam. ;
spores '0175 mm.; elaters '075 mm. long x '01 mm. broad.
H ab.—Growing on rocks in alpine localities. Very rare.
7. Clogwyn-du-Arddu, Snowdon, Carnarvonshire, W. H. P.
12. Little Langdale ; Bow Fell, Westmorland, G^./Sifai/er. “ This
species grows along with Marsupella Stableri on the large stones
and rocks immediately to the left of the track from the top of
Rosset Ghyll to Angle Tarn,” G. Stabler. 16. Moidart, West
Inverness, S. M. Macvicar.
Found on the Continent, Riesengehirge, Germany, G. Lim-
pricht,