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S y n .— Gymnostomum calcareum N e e s H o r n s c h . Bry. germ..i, 1 5 3 , t. 10, f. 15 (18 23). B r id .
bry. univ. i, 65 (1826). H u e b e n . M usc. germ. 48 (1833). D e N o t . Syllab. 291 (18 38),
Epil. bri. ital. 603 (18 6 9 ). B r u ch S c h . Bry. eur. fasc. 33— 36, p. 6, t. 3— 4 (18 4 6 ),
R a b e n h . Deutsch. kr. fl. ii, S . 3, 12 1 (18 48). S c h im p . Synops. 3g (i860), 2 ed. 40
H u s n . M ouss. nord-ouest 40 ( 18 7 3 ) , Musc. gall. 8, t. 3 (18 84). J u r a t z . Laubm.
oesterr.-ung. 14 (18 8 2 ) . L e s q . J a m e s Mosses N . Amer. 53 (1884).
Weissia calcarea C. M u e l l . Synops. i, 659 (1849).
Hymenostyliiim calcareum M i t t . J ou rn L in n . s o c . i, S u p p l. 33 (18 5 9 ).
Trichostomum calcareum L in d b . d e T o r t . 229 (18 6 4 ). M i l d e B r y . s ile s . 107 (1869).
Mollia calcarea L in d b .
Dioicous ; short, v ery tender and slender, in densely compacted
tufts, bright light green above, ferruginous below. L ow e r lea ves very
small, e recto-patent, nar rowly lane, upper much larger, lineal-lanc.
ra ther obtuse, concave, margin v ery minutely crenulate, nerve stout,
prominent at b ack, vanishing towards apex, ce lls minute quadrate.
Perich bracts from a broader subvaginant la xly areolate base, lanceolate-
subulate, patulous ; caps, on a pale straw-coloured seta, e re c t, oblong,
short-necked, pale brown with a red mouth, when empty, subcylindric
truncate, slightly con tra cted below the mouth ; annulus v ery narrow,
persistent, lid conic with an acute oblique beak. Male plant more
slender, infl. very minute, la teral, b racts ovato-acuminate.
H ab. - Calcareous rocks ; very rare. Fr. 6— 7.
Cheedale, Derbyshire (Holmes 1874) ! ! Monsal Dale, Ashwood Dale and Ravensdale
c. ir. (Holt 1883) ! !
Var. /S. viridulum (Brid.)
Plants very short and slender, darker green, branched; lower leaves
minute, remote, upper crowded, oblongo-lanc. shorter, recurved from the
middle, subacute or muticous ; caps, minute, ovate.
S y n .— Gymnostomum viridulum B r id . o p . c . 66.
G. calcareum Var. y. viridulum. Bry. eur. 1. c. t. 3.
G. calcareum Var. ê. hrevifolium S c h im p . Synops. 40.
Hab.— Damp rocks. Blackball, Banchory (J. Sim 1871) ! !
This moss is most striking by its lovely light green mats, and it is
extraordinary that it should so long have escaped notice. Mr. Holt has had
the good fortune to find it in fruit, which is only produced sparingly and in
crevices away from the light. Th e plant is very variable in the fruit, the
capsule being sometimes nearly globose, and in other cases subcylindric ; the
density of the stems is also in some cases so great as to attain an almost
corky consistence.
12. MOLLIA ÆEUGINOSA (Sm.) Lindb.
D io ico u s ; densely tufted, dicho tomously branched. L e a v e s lan ceo late
linear, ra ther obtuse, crenulate with papillæ at base, nerve
v anishing. Caps, oval, not annulate, lid rostrate. (T . X X X V , B.)
S y n .— Gymnostomum oeruginosum S m ith F l . brit. iii, 1163 (1804), Eng. B o t . t. 2200. B r id . S p .
musc. I, 36 (1806), M a n t . 18 (1819), B r y . univ. i, 80(1826). S c h k u h r Deutsch. kr.
gew. ii, P. II, 25, t. II (1810).
T o r t u l a c e æ .] 241 [Mollia.
Gymnostomum rupestre S c h l e i c h . Cal. pl. helv. 2g (1807). S c h w a e g r . Suppl. I, P. I,
31, I. 10 ( i S i i ) . B r id . Mani. 17 , Bry. univ. 1, 77. N e e s H o r n s c h . Bry, germ. 1. 150,
t, 10, f, 16 (1823). H o o k . T a y l . M u s c . br. 2 ed. ig, Supp. I. 2 (1827). H u e b e n .
Musc. germ. 49 (1833). M a c k . Fl. hibern. P. 2, 10 (1836). H o o k . Br. fl, ii, 8 {1833).
D e N o t . Syllab. 291 (1838I, Epil. bri. ital. 603 (1869). B r u c h S c h . Bry. eur. fasc.
33— 36, p. 7. I. 5—5 (1846). R a b e n h . Deutsch kr. fl. ii, S. 3, p. 122 (1848). W i l s .
Bry. brit. 41, I. 32 (1855). S c h im p . Synops. 41 (i860). B e r k . Handb. br. m. 294
(1863). H o b k . Syn. br. m. 32 (1873). J u r a t z . Laubm. oesterr-ung. 15 {1882). L e s q .
J a m e s Mosses N . Amer. 53 (1884). H u s n o t M u sc . gall. 9, I. 3 (1884).
G. articulatum S c h k u h r op. c. 29, I. 11. B r id . Mant. 18, Bry. univ. i, 78. N e e s
PIORNSCH. op. C. i, 156, t. 10, f. 17.
G. (non S m it h , nec D ic k s , nec B r id .) . N e e s H o r n s c h . op. c. i6 8 , t. 11,1.23.
Ct . rupestre Var. stelligerum Bry. e u r . Bry. brit.
G. erythrostomum B r id . Bry. univ. i, 84.
Weissia rupestris C. M u e l l . Synops. i, 657 (1849).
Trichostomum curuginosum L in d b . de Tort. 22g (1864).
Trichostomum rupestre M il d e Bry. siles. 106 (1869).
Mollia oeruginosa L in d b . M us c . Scand. 21 (1879).
Dio icou s ; densely cæspitose, J— 3 in. high, slender, deep green
above, fuscescen t below, tomentose, dichotomously branched, fastigiate.
L e a v e s ac c re scent, fa s c icu la te , patent and curved upward, when dry
erect and incurved, lower nar rowly lanc. upper narrowly lineal-lanc.
muticous, nerve th ick y ellowish, vanishing in the apex, margin plane,
very minutely geminato-papillose ; cells rectang . and pellucid at base,
quadrate and minute above. Perich. bra cts sheathing, la xly hexagono-
re ticu la te at base ; caps, leptodermous, on a shortish pale red seta, oval,
short necked, when emp ty pale y ellow, glossy, mouth rufous or blackish
red, not annulate, lid conic, sh ortly rostrate, the beak pale. Male plant
more slender, inner bra cts ovate, fuscous.
H ab.— We t rocks, especially in calcareous subalpine districts. Not
uncommon. Fr. 8— 9.
Var. ¡3. ramosissima Br. Sch.
Compactly pulvinato-cæspitose, olivaceous-green. Plants very slender,
very much branched, fragile ; leaves short and narrow, more obtuse ;
capsules small, elliptic, lid conical.
Hab.— Castleton, Derbyshire (T. Rogers 1881) ! ! Millers Dale (Holt 1882) ! !
This moss is of frequent occurrence among the limestone hills of the
north of Fngland, as well as in Scotland, forming dense mats of a deep rich
green colour.
Although resembling Barbula curvirostris very much in habit, the areolation
of the upper part of the leaf will at once distinguish them ; in the
present plant the cells are minute and opake, in B . curvirostris larger, empty
and clearly defined. The Var. stelligera is merely a form with repeated
innovations.
13. MOLLIA VERTICILLATA (L.) Lindb.
Dio icou s; la xly tufted, dicho tomously branched. L e a v e s from a
broader base with toothed margin, lanceolate, narrow and subsubulate.
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