" A . ‘
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:î,
I
I
2 ed. 153 . B e r k . H a n d b . br. m. 2 7 1 , t. 23, f ig . 2 a-d {1863). L in d b . d e T o r t . 220
(18 6 4 ). De No t. E p i l. bri. ita l. 5S6 {18Ö9). M it t . J o u rn . b o t . 18 7 1 , p. 5. H o B K .S y n .b r .
ni. 56 (18 73).
Paroicous ; densely cæspitnlose, innovating a t apex, bright yellow-
green. L e a v e s dense, octofarious, spa thula te, very obtuse, nerve
excurrent in a long pale green rigid hair ; margin recurved ; cells at base
thin, pellucid, narrowly re c tangula r , above papillose, chlorophyllose,
larger, hexagonal. S e ta orange, twisted to the left above, to the right
below ; caps, oval with a short neck, leptodermous, shorter and wider
at mouth than th a t o f P . Wilsoni, reddish brown ; ca l. large smooth,
Hd short, pa le red, obliquely ro s te llate , ann. v ery narrow, persistent ;
spores smooth. Antheridia naked, in pairs in the axils o f the com a l
leaves.
H ab.— Moist banks and ro ck s b y the sea. F r , 3— 4.
Near Forfar {Don 1802). Redhead, Montrose {Dnimmond 1827) ! Girdleness lighthouse,
Aberdeen [Dickie 1840) ! ! Penzance and Guernsey [Ralfs 1S44) I ¡ Torquay [Mrs.
Griffiths). Aldrington beach, Brighton [Mitten) ! ! Between Garth ferry and Beaumaris
[Frazer 1867) ! Elie, Fife [Hozoie 1867) ! St Prideux head, Devon [Holmes
1870) ! Oid Cambus, Northumberland [Hardy i86g) ! Shaugh, Devon ; Trevarthen
and St. Minver [Tellam 1879) ! ! Kymyal cliff, and Boscawen cliff, Penzance (Curnozv
1872) ! ! Howth, Dublin; Rossbay and Malahide (Moore). Blackhead, Belfast
[Stewart 1882) ! Douglas and Kirkmichael, I. o f Man (Holt 1880) ! !
Closel)^ resembling P . Wilsoni with which it was a t first confounded b y
Hooker , but re a d ily separated b y the smooth ca lyp tra and la x areolation,
which is like th a t o f P . trmicatula.
14. POTTIA LATIFOLIA (ScJmaeg.) C. Muell.
Au toicous ; cæspitose. L e a v e s c losely imbricated, broadly obovate,
smooth, nerve vanishing below apex. Caps, oval-oblong, lid oblique,
ro s tr a te ; te e th o f per. lan ceo late , c left. (T. X X X , B.)
Syn.— Weissia latifolia S c h w a e g . in S c h u l t e s Reis. Grossglock. IV, App. ( 18 0 4 ), Suppl. I, P.
I, 64, t. 18 ( 18 1 1 ) . G r e v . Scot. Cr. fl. iii, t. 149 { 18 14). R o e h l . Deutsch. fl. iii, 5 1
( 18 1 3 ) . Brid. M a n t . 44 ( i8 i g ) , Bry. univ. i, 356 (1826). F u n c k Moost. 13, t. 9 { 18 2 1 ).
H o o k . T a y l. M u s c . brit. 2 ed. 80, t. suppl. 3 (18 2 7 ). H o o k . Br, fl. ii, 20 (18 3 3).
Grimmia latifolia Web. Mohr Bot. Tasch. 147 (1807).
Anacalypta latif. F u e rn r . in Flora xii, P. II, Ergänz. 25 (1829). Nees Hornsch. Bry.
germ, ii, P. II, 135, t. 36, f. I (1831). B ruch Schimp. Bry. eur. fasc. 18— 20, p. 5, t. 4
(1843). Rabenh. Deutsch. kr. fl. ii, s. 3, gg (1848). W ils . bry. brit. 100, t. 33 (1855).
Schimp. Synops. 129 (i860). Berk. Handb. br. m. 269 (1863). De No t. Epil. bri. ital.
579 (1869). Hobk. Syn. br. m. 58 {1873).
Dcrmatodon latif. H u e b e n . M u s c . g e rm . 1 16 ( 18 3 3 ) .
Desmatodon bnlbosus De No t. Syllab. 203 (1838). Aong s t. in Nov. act. soc. Upsal. xii,
369 (1844).
Didymodon bulbosns Hartm. Skand, fl. 4 ed. 382 (1843J.
Pottia latifolia C. M u e l l . Synops. i, 549 (1849). S c h im p . Synops. 2 ed. 158 (1876).
J u r a t z . Laubm. oester.-ung, 94 (1882). L e s q . J am e s Mosses N, Amer. 103 ir884).
Pottia pilifera ß . mutica Lindb. de Tort. 223 (1864).
Tortula bullata ß . mutica Lindb. Musc. scand. 21 (187g).
Stegonia latifolia V e n tu r i in Rev. bryol. 1883, p. 96.
A u to icou s; gregarious or caespitulose, gemmiform, stramineous or
silvery ; stem simple or innovating. Le a v e s imbricated, glossy, broadly
obovate, lower obtuse, upper apiculate, very concave, margin incurved,
nerve vanishing below a p e x ; cells at base rectangular, above small,
rhombic, incrassate. Perich. bra cts elongated, narrowed, seta longish,
orange, caps, oval-oblong, annulate, glossy castaneous, lid obliquely
ro s tra te ; te e th lanceolate, entire or cleft to middle, pale or reddish.
Male infl. gemmiform, bracts three, oval.
H a b .— Crevices of rocks ; very rare. Fr. 5— 6.
Glen Phee, Clova {Drummond 1824) ! ! Carr rocks above Castleton [Dickie 1867) ! !
Differing so much in habit from the other species that I have felt tempted
to follow Venturi and regard this as the type of a distinct genus, but the
similarity in the capsule and peristome to those of Pottia has inclined me to
retain it here. According to specimens in Dickson’s and Smith’s herbaria,
Bryum piliferum D ic k s . Crypt, fasc. IV, 10, t. 10, fig. 14. belongs to
Tortula (Desmatodon) systylia ( B r . S c h im p .) a rare species found at great altitudes
in Norway, and most unlikely ever to have been found at Aberfeldy ; P . latifolia
var. ¡3. pilifera (Dieranum bullatmn S om m .) must therefore be excluded from our
lists as well as Tortula (Desmatodon) latifolia (H e d w .).
5. T O R T U L A H e d w .
(Fund. musc. II, 92 (1782). )
P lants short or tall, cæspitose, simple or dichotomously branched,
yellowish-green. Le a v e s oblong or spathulate, papillose, usually obtuse
with the nerve excurrent or extended into a long pellucid hair ; areolation
hyaline and elongated at base, quadrato-hexag. opake and ch lorophyllose
above ; perich. b ra c ts s ca rce ly diverse. Cal. cu cu lla te . Cap s,
erect, oblong or cylindraceous, subincurved, sometimes gymnostomous,
te e th o f peristome 32, filiform, ca rinate, papillose, remotely jointed,
placed on a distinct tubular, more or less elongated basal membrane,
straight, incurved or spirally contorted. Spores small, nearly smooth.
Inhabiting th e ground, walls, or rocks, rarely trees. Der. tortus
twisted.
The genera Tortula and Barbula were founded by Hedwig in his Fund,
muscorum, but he gives no other distinction than that Tortula has monoicous
infl. (ex. T. muralis and subulata), and Barbula dioicous jex. B.
ruralis and unguiculata). This character is, of course, insufficient to
separate genera, and Schreber amended it by uniting the two, and
naming it Tortula, in which he has been followed by most English
authors, while the continental writers sink Tortula and use that of Barbula.
B y bringing into greater prominence the colour and structure of
the leaves, we obtain two series, which may conveniently be retained as