)
is moivly 111! aociiloiital state of this sqiocies.—B r it. Kvs. : Leight.
11. 2 .
This diilers from li. scopuhru>n chiefly in the absence of any chemical
reaction of tlie medulla. Tbe tballus is variable iu size aud in the
character of the laciuiæ, and is often rougbish witli spermogoniiferous
pustules. The apothecia, e.xcept iu the occasionally striatulate receptacle
anti the size of the spores, are, as well as the spermogones, similar to
those of li. scopulorum, though often congested and difform.
Ilah. On rocks aud boulders in maritime districts, rarely on bills at a
distance from the sea.—D k tr. General and abundant on all the rocky
coasts of Great Britain, the Channel Islands, and probably also of Ireland.—
B. AI. ; Island of Guernsey. Leigh Tor, Dartmoor, near Ply-
numtli, AVembridge, and Torquay, Devonsbire ; Land’s End, Tintagel,
the Lizard, Lamorna, St. Breock, aud Pentire, Cornwall ; Tenbjq Pembrokeshire
; Aberdovey aud Dolgelljq Alerionetlishire ; South Stacks,
Island of Anglesea ; Pwllheli, Carnarvonshire ; Holy Island, Nortlumiber-
land ; St, Bees, Cumberland. Solway Eirtli, Kirkcudbrightsbire ; Rivel-
stoii and Ciamond Island, near Edinburgh ; Innerkip, Reufrewsliire ;
11 inks of the Tay aud Turin Ilill, Forfarshire ; Kinnoul Ilill, Perthshire ;
Portlethen, Kincardineshire ; near Peterhead, Aberdeenshire. Great
Island, Cork ; Ardglass, co. Down.
Form m in o r Nyl. Bull. Soo. Linn. Normand, ser. 2, iv. (1870)
p. 159.—Thallus small, e re c t; laoiuiæ simplish, slender, subulate.
Apothecia small, terminal or subterminal.—Cromh. Grevillea, vii.
p. 141.
A much dwárfed condition, being only 4 in. to 1 in. in height, w ith the
laciniæ often black at the apices. The apothecia are small and usually
numerous.
Hah. On dry exposed rocks in maritime tracts.—Distr. Local, though
plentiful where it occurs in the Channel Islands, S. and AA’. England, and
in N.E. Scotland ; probably to be detected elsewhere,—B. AI. : The Vale,
Island of Guernsej’. AA’embury, Devonshire; Fowey and near Penzance,
Cornwall ; Tenby, Pembrokeshire ; Aberystwitb, Cardigausliire ; St. Bees,
Cumberland. Portlethen, Kincardineshire.
A’ar. p . crassa Del. ex N jl. Bull. Soo. Linn. Normand, ser. 2, iv.
(1870) p. 159.—Thallus somewhat small, thick, suliopaque, tu b er-
culoso-difform, rigid, shortlj’ laciniate ; laciniæ dilated, sparingly
divided (medulla K - ) . Apotheoiaohieflj’ torminal.—Cromb. Journ.
Bot. 1874, q). 1 4 7 ; Leigbt. Lich. FL ed. 3, p. 90.
Analogous to var. incrassata of B. scopulorum, from which it differs in
the absence of any chemical reaction of the medulla. The thallus is
sometimes terebrate in old plants. Our British specimens are rarely
fertile.
Hah. On rocks and boulders in maritime tracts.—Distr. Local and
scarce in tbe Channel Islands, S. and N. England, and in N.E. Scotland.—
B. AI. : La Aloye, Island of Jersey. Near Penzance, Cornwall; St.Bees,
Cumberland. Portlethen, Kincardineshire.
Subsp. R. 'brevinscula Nyl. Flora, 1873, p. 66.— Thallus small,
dcqiressed, firm, often subpulvinato-stipato ; laciuiæ short, congested,
turgid, variously difform (medulla K— ). Apotheoia small or nearly
moderate, the margin of th e receptacle suborenate.—Cromb. Grevillea,
vii. p. 141.—B amalina cuspidata f. hreviuscida Nyl. Bull.
Soo. Linn. Normand, ser. 2, iv. (1870) p. 159. B ama lin a p o ly -
morjolia f. depressa Cromb. Journ. Bot. 1872, p. 72 ; Leight. Lich.
F l. ed. 2, p. 475, ed. 3, p. 87. B ama lin a scopidorum, p. polymorpha
Aludd, Alan. p. 74. B . polymorpha qiro max. parte, Leight. Lich.
Fl. and Cromb. Lioh. Brit. ; ? Tayl. in Alack. Fl. Hib. ii. p. 84.—
B rit. E.VS. : Leight. n. 73 ; Aludd, n. 47.
This subspecies is somewhat variable in size, and in some of its smaller
states is closely appressed to the substratum. The broader laciuiæ, which
are occasionally convex, are often covered with spermogoniiferous yer-
rucæ and young apothecia ; the former have been mistaken by British
authors for the granulose soredia of R. polymorpha. I t is usually infertile.
Hah. On rocks in maritime tracts and on mountains.—Distr. Not general
nor common in the Channel Islands, S., W., aud N. England, on the
N.E. coast of Scotland, and probably also among the Grampians.—B. AI. ;
Coast of Guernsey and Island of Sark. Lustleigh Cleeve, Dartmoor,
Devonshire ; Tintagel and Polperro, Cornwall ; Gower Peninsula, Glamorganshire
; Aloel-y-golfa, Alontgomerysliire; near Thirsk and on top
of Roseberry, Yorkshire. Portlethen, Kincardineshire.
Form gracilesoens Cromb. Grevillea, vii. (1879) p. 141.—Thallus
very small, pulvinato-congested, laciuiæ short, slender, shortly
divided a t th e apices, which are finely incurved or revolute. Apothecia
not seen.
Tbe characters given separate this form, w’hich otherwise agrees with
the type. No apothecia have been seen, but spermogones are sparingly
present.
Hah. On boulders and walls in maritime tracts.—Distr. Ijocal and rare
in the Channel Islands and S. England, but may occur elsewhere.—
B, AI. : Island of Sark. Near Brighton, Sussex.
12. R. Curnowii Cromb. ex Njd. Flora, 1875, p. 441.—Thallus
fruticulose, subrigid, slender, rounded or somewhat compressed,
shining, sparingly branched and b u t slightly interwoven, pale glaucous
(medulla K — )• Apothecia term in al and late ra l, small or nearly
moderate, convex, pale, genionlato-adnate, th e receptacle smooth ;
spores ellipsoid, stra ig h t, 0 ,0 1 1 -1 5 mm. long, 0 ,0 0 4 -6 mm. thick.
— Cromb. Grevillea, iv. p. 180 ; Leight. Lich. Fl. ed. 3, p. 90.—
B r it. E xs. : Cromb. n. 129 ; Larb. Cæsar. n. 13.
Allied to R . cuspidata, though, as stated hy Nylander f. c., the colour
of the spermogones might lead us to place it in the section of R. carpa-
thica. The thallus, which is moderate or more or less elongate (from 2 to
6 inches in length), is blaclrish towards the base, and the laciniæ, for the
most part simplish (rarely branched towards the apices), are usually
narrow, though varying soniewliat in breadth. AVhen fertile the apothecia
are numerous, The blackish spermogones are frequent, with spermatia
0,003 mm. loug, 0,001 mni. tliick.
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