narrower than the centre ones and deep purple in colour, inner
hyaline 10-12 cells in diameter, all very small; procumbent or
somewhat erect. Leaves imbrioate or approximate, horizontal to
patent-divergent, somewhat regular, unequally bilobed, margins
spinose-ciliate or denticulate, antical lobe about half the size of the
postical, nearly or not quite crossing the stem, convex, snbquadrate,
acute ; postical lobe obovate or broadly oval, rotundate ; epidermis
smooth ; cells small, roundish-quadrate or roundish-oblong-quadrate,
guttulate ; walls and angles thickened. Bracts much larger
than the leaves, unequally bilobed, antical lobe about ^ smaller
than the postical, ohlong-quadrate, rotundate, obtuse, margin
spinose-ciliate or denticulate ; postical similar to the leaf lobe.
Perianth projecting f beyond the bracts, oblong, month wide,
distantly denticulate or shortly ciliate. Capsule dark reddish-
brown, thick texture. Spores smooth, pale reddish-brown. Elaters
reddish-brown, hispiral. Androecia terminal on stems ; perigonial
bracts 2, 3 pairs, unequally bilobed, antioal lobe smaller than the
postical, ovate-orbicular ; postical obovate. Antheridia 3 in each
bract, very large, oval.
Fruits April, May, June.
Dimensions.—Stems J to J inch long, '2 mm. diam., with
leaves L75 mm. wide; leaves, antioal lobe ^8 mm. x ^4 mm.,
postical !■! mm. x^7 mm., antioal J mm. x ■e mm., postical
f 2 mm. X -7 mm., antioal L mm. x '5 mm., postical mm. x
■7 mm. ; cells ^02 mm., ^02 mm. x ■015 mm., ^02 mm. x ■Ol mm.,
■02 mm. x ^025 mm.; bract, antical lobe 1^5 mm, x ■O mm., postical
2- mm. X 1^2 mm.; perianth A mm. x 1^25 mm.; pedicel
■2 ram. diam.; valves of capsule 1^25 mm. x ^55 mm.; spores
■015 mra. ; elaters ■OS mm. x ■Ol mm. ; perigonial bract, antical
lobe !■ mm. X ■O mm., postioa] 1^5 mm. x ■O mm.; antheridia
■24 nim. x ■lO mm.
Hab.—On shaded rocks, Littlebeck, Eskdale, Yorkshire,
.1/. B. Slater.
Found on the Continent, Mont-Dore, France, B. Lamy.
Obs.—Mr. Slater collected this species many years ago, and
detected with his usual acuteness the characters which separated
it from S. nemorosa on the one hand and S. mnbrosa on the other.
Specimens were submitted to his friend, the late Dr. Spruce, who
gave it a MS. name which, however, was never published.
In Part I. ol Husnot’s “ Hep. Gall.” p. 22, it is published as
S. nemorosa, var. intermedia, and on Plate 111, Fig. 23, given as
S. intermedia.
Abbé Lamy, in “ Revue Bryol.” p. 54 (1876), says he has
observed this species growing in several ravines about Mont-Dore
under different conditions, where it retains a perfect conformity of
aspect and character, distinguisliing it no less from S. mnbrosa than
from S. nemorosa, and he considers it well deserving of specific rank,
and approves of the name intermedia.
The acute antical lobe separates it from S. nemorosa and the
rotundate jiostioal lobe from S. ambrosa at once.
Note on Scapania intermedia, Husn,, by Mr. M. B. Slater :
“ Scapania intermedia, Husn., approaches in some of its characters
to S. piirpurascens (Hook.) ; it is, however, a smaller plant,
and resembles more a broad-leaved A. mnbrosa ; in cell structure
and shape of leaf lobes it mueli resembles A. purpurasoens.
“ I t is generally of a pale rosy colour, often whitish, and never
assumes the fine purple colour of some of the forms of A. pmrpu-
rascens.
“ The latter plant grows very abundantly in the tributary
streams of the Esk and other moorland rivulets on the North
Yorkshire moors, growing on stones by the stream sides, which
are often inundated during flood times, and it grows most
luxuriantly on stones where the water is constantly trickling over
its roots, assuming fine rosy and purple hues in places exposed to
sunlight, becoming greener under the shade of the stream banks
or under trees.
“ A intermedia always grows on drier rocks out of the stream,
often in company with A, mnbrosa, DiplophjUum albicans, and
Harpanthus scutatus. The name is very appropriate to the plant,
indicating its intermediate character between A. mnbrosa and
purpurascens."
D escription op P late XCI.—Fig. 1. Plants natural size.
2. Stem, antical view x 16. 3-7. Leaves x 24. 8. Portion