'•11';
I Ii
fl'
H ab.— In similar localities, but less frequent.
Nant-y-Fydd, Wrexham {Bozvman) ! ! Trefriew, N. Wales (Dr. Wood 1861)! Pont-y-
I;
Md [Holmes 1878) ! ! Ptarmigan Mtn., Perth [Holt 1880) ! ! Cautley Spout, Yorks.
TUfs/ i8Si) ! ! Glen Meay, I. of Man [Holt 1880) ! ! Ravensdale, Derby (Holt 1883) ! !
Ben Laoigh, Perth [Ewing 1884) ! ! Gainford, Durham [R. Barnes 1887) !!
Frequently met with on mountain rocks and often encrusted with lime.
It varies greatly in height and density, and also in the form of capsule and
length of leaves, and after much study we have come to the conclusion that
H. comnmtafum cannot be maintained as a species, for the two forms of
areolation run into each other, even on the same plant.
B. curvirostris much resembles Mollia æruginosa, but may be known by its
broader leaves with recurved margins and narrower nerve, the cells lax and
hyaline at base, quadrate and well defined above, the pachydermous rufous
capsule, and subulate systylious lid.
Lindberg distinguishes three forms of the species, a. scabra with shorter
leaves, and scabrous, quadrate cells. ¡3. lævinscula with long narrow leaves,
and scarcely scabrous quadrate cells, y. commutata, with long narrow leaves,
and smooth rectangular cells.
Sect. 2. E R Y T H R O P H Y L L U M Lindb. Leaves lanceolate, acuminate,
the lower rusty red. Capsule subcylindric, teeth 16, lanceolate, tender, with
scarcely any basal membrane.
2. BARBULA RUBELLA {Hoffm.) Mitt.
Pa roicous. L e a v e s recurved, lineal-lanceolate, nerved to apex,
lower red, margin recurved. Caps, cylindric, lid short-beaked, te e th pale
red. (T. X X X IX , A.)
S y n .— Bryum rubellum H o f f m . Deutsch. fl. ii, 33 (1795)-
Grimmia rubella R o t h Fl. germ, iii, P. I, 149 (1800).
Weissia rubella R o e h l . M o o s g . d e u t s c h . 142 (18 00 ).
Grimmia recurvirostris Sm. Fl. brit. 1190, excl. syn. (1804!
I ; Eng. b o t . t . 1 4 3 8 . T u r n .
Musc. hib. ig (1804).
Grimmia curvirostris 'Web . Mokr Bot. Tasch. 135 {1807).
V o i t in S t u r m Deutsch. fl.
ii, heft 14 (1813) ; Musc. herbip. 29 (1812).
Weissia curvirastra H o o k . T a y l . M u s c . b r it. 46 e x c l . s y n . t. 14 ( 18 18 ) . H ook . F l . s c o t .
P. II, 130 ( 18 2 1 ) , Br. fl. ii, 22 (18 3 3).
Anacalypta recurvirostris F u e r n . in Flora xii, P II, Erg. 25 (1829). N e e s H o r n s c h . Bry.
germ, ii, P. II, 1 5 1 excl. syn. t. 3 7 , f. 6 ( 18 3 1 ) .
Anacalypta rubella H u e b e n . musc. germ. 119 (1833).
Didymodon ruhellus B r . S c h . Bry. eur. fasc. 29-30, p. 3 excl. syn. t . i ( 18 4 6 ). W i l s . Bry.
br. 106, t. 14 ( 18 5 5 ) . S c h im p . Synops. 130 ( i8 6 0 ) , 2 ed. 160. B e r k . Handb. br. m.
264 ( 18 6 3 ). H o b k . Syn. br. m. 58 ( 18 7 3 ) . H u s n . M ouss. nord-ouest 68 {18 73 ), Musc.
gall. 82, t. 23 (18 85). J u r a t z . Laubm. oesterr.-ung. 98 {1833). L e s q . J a m e s M o s s e s
N. Amer. 104 ( 18 8 4 ).
Trichostomum rubellum R a b e n h . Deutsch. kr, fl. ii, S, III, 115 excl. syn. (1848). C.
M u e l l . Synops. i, 581 excl. syn. (1849). H a r t m . Sk. fl. 7 ed. 381 (1858). L in u b . De
Tort. 226 (1864). M i l d e Bry. siles. lo i (i86g).
Barbula rubella M i t t . Journ. Linn. soc. xii, 162 (1869). L in d b . Musc. scand. 22 (1879).
Pa roicous and synoicous ; cæspitose, deep green above, ferruginous
red below, i — zin. high, slender, branched. L e a v e s curled when dry.
patent and recurved when moist, the lower lanceolate, upper suddenly
larger, from an erect concave base, lineal-lanceolate, acuminate, carinate,
minutely papillose on both sides, the margin recurved, nerve terete,
vanishing below or in the apex ; cells at base pellucid rectangular, above
small quadrate and chlorophyllose. Perich. bracts longly sheathing,
thin ; caps, erect, on a long reddish seta, cylindraceous, rarely oblong
or oval, leptodermous, pale brownish-green, finally reddish ; annulus of
two rows o f large cells, very fragile, lid conic, with a short straight or
slightly oblique beak ; per. on a short basal membrane, pale red, soft,
o f i 5 flat linear te e th , ra re ly cleft or perforated, the articulations nodose
and papillose. Antheridia usually naked in the axils o f the perich. bracts.
Hab.— Walls, rocks and stony ground, principally in subalpine districts.
Fr. 8— g.
Var. /3 dentata (Schimp.)
Plants dingy green, the leaves longer, with the margin recurved only to
the middle and toothed toward apex.
S y n .— Didymodon rubellus fi dentaius S c h im p . Synops. 131.
Didymodon dentatus J u r a t z . MSS.
Trichostomum alpigenum V e n t . MSS.
Didymodon alpigenus J u r a t z . Laubm. oesterr.-ung. 98.
H ab.— We t stony places on mountains.
Clayton downs, Sussex (Mitten) ! Schiehallion (Braithwaite 1884) ! ! Coneysthorpe,
Yorks. (Spruce 1878). Miller’s dale (Holi 187g) ! I Ingleborough (Cos/i r88o) ! !
V ar. y. ruherrima (Fergasson).
Plants more slender, slightly branched, 4— 2Ín. high ; leaves short, more
distant, all vinous red, entire, from an oblong base, suddenly narrowed near
the middle and incurved at margin, acutely acuminate.
H ab.— Mountain rocks.
Head of Glen Lochay (Arnott and Borrer) ! Glen Tilt (West 1880) ! ! Ben Lawers
(Braithwaite 1865) ! ! Clova (Fergusson) ! !
Barhula rubella varies considerably in size and density, but is very uniform
in the fruit, and always more or less red in the lower leaves. In Var. fi. the
denticulation varies much, but in no case have I seen it so spinulose as in
continental specimens. The Var. 7. differs widely from the type, and has
quite the aspect of a distinct species, indeed it was recorded as Didymodon
rufas L orentz, but Barbula rufa has a broader leaf, gradually narrowing
upward, the base of different shape with smaller and more numerous cells,
and the areolation of upper part not opaque and indistinct.
Sect. 3. E U B A R B U L A Linib. Plants slender or robust, young leaves
green, becoming more or less of a rusty brown colour, lanceolate with
recurved margins ; caps, narrow, teeth short or rudimentary, or long and
convolute.