oblong-subquadrate, entire or retuse, lower leaves minute, then
often acutely bifid ; texture firm, cells smallish, roundish-quadrate,
lumen full of chlorophyl granules, walls moderately thick
rigones large, distinct. Stipules minute, rudimentary, subulate
or broadly subulate, at the base x as wide as the stem. Bract!
similar to the upper leaves only larger. Perianth terminal on the
branches, projecting about ^ beyond the bracts, compressed
obovate mouth wide, bilabiate, irregularly dentate, teeth few
Capsule ™all, oval, dark brown. Spores small, pale brown
Elaters rather darker brown than the spores, bispiral, about 10
D k n t a l t h ' r n on the same
plant as the fertile or proceeding from the fertile branch, terminal
cu situated at the middle; perigonial bracts 5. 6 pairs, closely
imbricate, smaller and more erect than the stem leaves ventri
cose lobate. lobe oval, lobule half the size and oval, antheridia
Single, la rg e , almost sp h e ric a l.
Fruits April, May.
DiMENSioNS.-Stems about i inch long, diam. -2 mm., with
leaves . 0 mm to 2-5 mm. wide; leaves PO mm. x '8 m m .; cells
025 mm. x P 3 5 mm., -025 mm. x -03 mm., -025 mm. x '025 mm
03 mm. x -0 3 mm.; sub-bracts 2-0 mm. x P6 mm., 2- mm x ’
1-4 mm., 2- mm. x P75 mm. ; bracts 2-5 mm. x 2- mm • perianth
3- m m .x 1-75 mm.; pistillidia -225 mm. x -06 mm!; spores
01 mm. diam.; elaters -1 mm. x -01 mm.; perigonial bracts
75 mm. x -45 mm. ; lobule -5 mm. x -3 mm. ; antheridia -225 mm
X -2 mm., -3 mm. x -25 mm.
HAB.-Grows on damp rocks, usually calcareous. Rare.
2. Ardingley Rooks, Sussex, W. Mitten. 5, 8. Cheedale
erbyshire, G A. Holt. 10. On rocks by the Strid, Bolton
Woods, Br. Carrington, John Nowell; Malham, Br Carrinaton -
Ingleton, W. H. P. 12. Windermere, Westmorland, Br Ca j
rmgton. ’ ' “
Found on the Continent.
Greenland, Vahl.
O b s .—This rare species is not likely to be confused with any
other, especially if found fertile.
Chiloscyphus polyanthos (L.) is a larger plant, with quite
different cell structure, and furnished with distinct bipartite
stipules.
I have examined a large series of specimens from different
localities, and am of the opinion that the var. pyrenaica is only
sportive, as stems which might be described as it are found also
on the normal form. Dr. Carrington arrived at this oonclu.sion
years ago, and Dr. Spruce, who first noticed it, in later years had
no great confidence in its specific or varietal value.
D escrip'I'ion of P late CXI.—F ig . 1. Plants natural size.
2. Portion of stem x 16 (near Bolton Abbey, Jolm Nowell).
3. Portion of male stem x 16 (Baden, Jack). 4, 5. Leaves x
24 (ditto). 6. Portion of leaf x 290 (ditto). 7,8. Stipules x ?
(ditto). 9-12. Sub-braots x 11 (ditto). 13. Bracts x 11
(ditto). 14. Perianth x 11 (ditto). 15. Cross-section of perianth
x 11 (ditto). 16. Portion of the mouth of the perianth x
16 (ditto). 17. Spores x 290 (ditto). 18, 19. Perigonial bracts
x 24 (ditto). 20. Antheridium x 24 (ditto).
Genus 28. PLAGIOCHILA, Bum.
Jungermcmia, Mich. Nov. p i gen. p. 7 (1729); L. Sp. pi. ed. i. 2, p. 1131 (1753)
Gandollea, Raddi in Act. soc. Modena, 18, p. 22 (1818).
Martinellia, sect. b. Gr. k B. Nat. A rr. Brit. PI. 1, p. 692 (1821).
Radula, Dum. Comm. Bot. p. 112, pp. 1822.
Radvla, sect, Plagioohila, Dum. Syll. p. 42 (1831).
Plagiochila, Dum. Recueil, 1, p. 14 (1835).
Plants often very large and conspicuous, rarely small, caespi-
tose or creeping among mosses. Caudex stout, creeping, densely
radiculose on the underside, leafless or furnished with few small
ones. Stems firm, reddish,, or almost black, rarely pale, 3-5
exterior layers of cells coloured, inner pale. Branches ascending
or procumbent, dichotomously branched or dendroid, uniformly
lateral, springing from the leaf axils. Leaves almost always