124 H E P A T IC Æ .
4. Lepidozia setaoea [ ¡Feb.), Mitt.
.fungemiania setacea, Web. Spio. pl. Goett. p. 143 (1778), Hook. Brit. Jung.
t. 8 (1816).
Blephm'ostoma setacea, Dum. Kecueil (1885).
Lepidozia setacea (Web.) Mitt. Proc. Journ. Linn. Soc. v. p. 108 (1841).
Dioicous, densely cæspitose or creeping, small, pale yellowish-
green to dark or olive-brown in colour. Stems very slender,
filiform, firm, flexuose, on a cross-section 5 and 6 cells in diameter,
large, clear, cortical 10-12, similar in size to the inner; walls
firmer and darker ; irregularly pinnate, or subpinnate, often denu-
date below ; branches lateral, unequal, alternate ; flagella few,
postical ; radiculose, rootlets few, minute, hyaline. Leaves on
main stem contiguous or distant, on branches imbrioate ; erect,
incurved, in outline subquadrate, tri-, rarely quadri-partite almost
to the base, where tliey are 6 cells broad, segments setaceous,
subulate, 3-6 cells long, 2, 3 cells wide at the base, branch leaves
often bipartite only ; texture delicate ; cells 4-, 5- and 6-angled,
smallish to medium size, lumen clear, walls thin but firm, no
trigones or thickened angles. Stipules equal in width to the
stem or slightly wider, erect, sometimes appressed to the stem,
oval-orbicular in outline, tripartite almost to the base, segments
setaceous, subulate, usually 4 cells long, a row of 2 at the base.
Perianth postical, arising usually from near the base of the stem
from an axil of stipule, on short branches, projecting f beyond
the bracts. Innermost bracts much larger than the leaves, oval-
orbicular, bidentate, segments ciliate-dentate, acuminate ; bracteole
oval, bidentate, segments ciliate-dentate, acuminate. Perianth 4
times longer than broad, oblong, oylindrioal below, plicate above,
mouth somewhat contracted by the folds, ciliate-dentate, cilia few,
3, 4 cells long, texture delicate, cells laxer than those of the leaves,
elongate, almost white in colour, lower half composed of two
layers of cells, above of one layer. Calyptra obovate, very delicate ;
pistillidia 4-6, linear. Pedicel long, pellucid, delicate. Capsule
oval, dark chocolate-brown. Spores dark brown. Elaters bispiral,
slightly broader than the spores, similar in colour. Androeoia
L E P ID O Z IA . 125
usually on short lateral branches at the middle or end, amentiform,
when terminal often subspherioal, rarely on main stem ; perigonial
bracts 4, 5 pairs, closely imbrioate, of delicate texture, pale colour,
bifid, rarely trifid, margin dentate, rarely entire. Antheridia
solitary, small, oval, shortly stipitate.
H ab.—Growing in dense depressed tufts or straggling amongst
Sphagna or other mosses and hepatics on damp shady banks,
moors, or marshy ground. Common.
1-3, 5, 7-10, 12-16, I.
Found on the Continent and in North America.
D imensions.— Stems to 1 inch long, diameter '075 to T mm.,
with leaves '2 mm. wide; leaves T75 mm. x T5 mm., segments
T25 mm., T5 mm., '25 mm. x '2 mm., seg. '2 mm., '15 mm. x
T25 mm., seg. '1 mm., 125 mm. x T mm., seg. 'I mm.; cells
•02 mm. x '03 mm., '025 mm. x '035 mm., '04 mra. x '03 mm.,
•035 mm. X-02 mm.; stipules '175 mm. x '125 mm., seg. ’125
mm. ; bracts ’45 ram. x ’25 mm., seg. '125 mm., ’55 mm. x '35
mm., seg. '175 mm., '75 mm. x '35 mra., seg. '15 mm. ; bracteole
•4 mm. X '2 mm., seg. '15 mm.; sub-bract '25 mm. x "2 mm.;
sub-braoteole '2 mm. x '1 mm. ; perianth 2- mm. x ’5 mm., 3'5
mm. X ’75 mm. ; cilia at the mouth '15 mm.; calyptra '6 mm. x
'4 mm. ; pistillidia ’2 mm. x '05 mm. ; capsule '7 mm. x '35 mm.,
valves '8 mm. x '3 mm.; pedicel '175 mm. diam. ; spores '01 mm.
diam.; ekters '175 mra. x ’0125 mm.; perigonial bracts '25 mm.
x -15 mm., seg. '175 mm., '3 mm. x ’2 mm., seg. '2 mm., '325
mm. x '225 mm., seg. '175 mm. ; perigonial bracteole '25 mm. x
■1 mm., seg. '2 mm., '1 mm.; antheridia '08 mm. x '06 mm.
O b s.—Distinguished from all other British Lepidozia by its
smaller size, deeply divided leaves with subulate segments; from
Blepharostoma trichophgllitm by its smaller size, more robust habit,
darker colour, shorter segments of leaves, lateral branches, long
narrow perianth, and dioicous inflorescence.
The varieties sertdarioides and Schultzii [Jung, sertiilarioides,
Linn. f. suppl., p. 449 ; .Tung. Schultzii, Spreng PugilL, 1, p. 64)
with smaller, closer imbricated leaves, are found in drier situations,
and pass to the normal form in damper localities.