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Var. S. fragilifolia {jfumtz.)
Plants short, i in. high, yellow-green, with few radicles; leaves short,
incurved, fragile, and breaking off near the summit, so that the apical only
are entire, points short, not acuminate, mucronate with the excurrent
rufescent nerve, which is pale and glossy at the back.
S y n .— Barhula tortuosa Var. y fragilifolia J u r . - \ t z . 1. c.
Tortula thransta S t i r t o n M S S .
H ab.— On a wall near Killin [Stirton i868).
This fine moss varies considerably in size and colour, and is very shy of
fruiting, but may be always recognised by its long narrow curled leaves,
with thin hyaline cells at the base. The var. 5. has much resemblance to
M. nitida in the fragile leaves, but their soft texture and yellow-green colour
sufficiently distinguish it.
24. MOLLIA FRAOILIS {Drumm.) Lindb.
Dioicous ; in dense tufts. L e a v e s dense, straight, e recto-patent,
lanceolate-subulate, b reaking off at the points, margin plane, nerve
excurrent. Caps, erect subcylindric, peristome convo lute. (T.
X X X V I I , D.)
S\-s.— Didymodon fragilis D r u m m . Musci Amer. bor. i, n. 127 (1828). H a r t m . in Nya bot. not.
1855, p. 48.
Tortula fragilis W iL S . in H o o k . Journ. Bot. iii, 437 (1841). C. H a r tm . Skand. fl. 7 ed.
377 (1858). D e N o t . M u s c . ital. I, 68, t . 35 (1862) ; Epil. bn. ital. 557 (1869). L i n d b .
de Tort. 253 (1864). H o b k . Syn. br. m. 73 (1873).
Trichostomum fragile C. M u e l l . Synops. i, 5S6 (1849).
Barbula fragilis Br. S c h im p . Bry. eur. fasc. 62— 64, Suppl. t. 4 (1855), Coroll, 141 (1855).
S c h im p . Synops. 1 8 1 (i860), 2 ed. 219. L i n d b . in Oefv vet. a k foerh. x x , 387 (1863).
J u r a t z . Laubm. oesterr.-ung. 123 (1822). L e s q . J a m e s Mosses N . A m e r . 129 (1884).
Campylopus Hartmani S c h im p . MSS. H a r t m . in Nya b o t . n o t . 1 8 5 5 , p . 4 9 .
Tortula Drummondii M i t t . Journ. Lin. soc. i, Suppl. 27 (1859). L in d b . in H a r t m . Skand.
fl. 8 ed. 392 (i86i).
Barbula Drummondii M i l d e Bry. siles. 124 (1869).
Mollia fragilis L i n d b . m u s c . s c a n d . 2 1 ( 1 8 7 g ) .
Dio icous ; in wide dense tufts, y ellow-green above, fuscous below.
S tems erect, stra ight, rigid, simple or dichotomous, densely matted
with brown tomentum. L e a v e s v ery crowded, e recto-paten t, lanceolate-
subulate, very fragile in the upper part, the margin plane, crenulate,
the comal from an elongated base, capilla ceo-subula te ; nerve when dry
very glossy and whitish on the b ack , excurrent in a triquetro-.semiterete
subula ; basal cells v ery thin and hyaline, prolonged far up the margin
in a narrowing band, apical minute, highly chlorophyllose, obscure
from the dense cov ering on both sides o f tru n ca te papillæ, descending
into the hyaline base with an a cute angle. C ap s , erect, short-necked,
from ov ate, oblong and subcylindric, regular c r ligh tly curved, lid twothirds
length o f caps, from a conic base, obliquely r o s t r a te ; teeth
very scabrous, slender, 2— 3 times convolute, falling away with the
columella.
Male infl. terminal, subdiscoid, with numerous antheridia, bracts
lanceolate-subulate.
H ab.— Wet mountain rocks, always sterile.
Ben Lawers (McKinlay 1865) ! ! Clova (Fergusson) ! 1 Ben Laoigh, Perth (Ewing 1885I.
Roundstone, Connemara [Moore 1853) !!
Very like M. tortuosa, but distinguished by its straight leaves with longly
excurrent triangular nerve.
8. L E P T O D O N T IU M H a m p e .
Linniea xx, 70 (1847).
L e a v e s squarroso-reflexed, complicato-conca ve, flexuose, the margin
serrulate or eroso-crenulate. Cap s, leptodermous, narrow, erect, hd
conic, peristome of 32 filiform, stra ight, erect, smooth teeth, unequal,
separate or anastomosing here and there in pairs, or co n n a s c e n t;
ca lyp tra cu cu lla te .— Der. A c t t t o s slender and ooovs a tooth.
A small but natural genus, of which the types are the East Indian
L . squarrosum (Hook.) Hampe and L . aggrcgatum C. Muell. and principally
distinguished by the squarrose serrate leaves.
Another European species is the rare Trichostomum suhalpinum D e N ot.
C lavis to the S pecies.
Stems short, slender ; leaves without a jDaler border.
Leaves broad at point, nerve vanishing.
_____acuminate at point, nerve excurrent, gemmiferous.
Stems tall, robust; leaves with a pale border.
flt’xifulinm
gcininasceiis
recurvifolium
I. LEPTODONTIUM FLEXIFOLIUM {Dichs.) Hampe.
Dio icous ; short, nearly simple. Le a v e s reflexed, oblong-ligulate,
apicu late , co a rse ly serrate at apex, nerve lost at or below the point.
Cap s, small, narrowly cylind ric , lid conic with a short obtuse point.
(T . X X X V I I , E .)
M i l d e Bry. siles. io6 (i86g}.
( -6 6 . S u l
i f k - S U M t . I X i T r i « b i ; | r i i l g :
S c h im p . Synops. 133 (i860), 2 ed. 163. B e r k . Handb. br. m. 265 (1863). H o b k . Syn.
hr. m. 60 (1873). H u s n . M o u s s . nord-ouest 69 (1873).
Leptodontium flexifolium H K m p e Llnniea xx, 70 (1847). L i n d e . De Tort. 227 (1S64).