$
»
COLLEMACEI. [ c o l l em o p s i s . COLLEMOPSIS.] COLLEMEI. 79
1. C. Schaereri Nyl. ex
Cromb. Journ. Bot. 187-1,
p. 332. — Thallus subeffuse,
thinnish,areolato-grauulose,or
minutely granuloso-sqnamu- V
lose, brownish-black or black-
ish. Apothecia small or nearly
moderate, plane, leoanorino
(with distinct thallinomargin),
brownish- or reddish-black ;
spores ellipsoid, 0 ,014-21 mm.
long, 0,0 0 7 -1 1 mm. thick ;
hymenial gelatine pale blue
and th en tawny with iodine.
— Leight. Lich. F l. ed. 3,
p. 2 5.— Pyrenopsis Schcereri Fig. 20.
Nyl. olim, Cromb. Lich. Brit. GoUenvypsis Schareri, Nyl—a. Section of a
p. 2 ; Leight. Lioh. F l. p. 15 small portion of the thallus, x 200. h.
Pannaria Schxreri X - 1 /iQcox Mas1s1. sR io. thecmm, x30. d. Theca with a“ p a'‘rPa®-’
Aut. Licb. (1852) p. 114.— physis, X3o0. e. Spores, XoOO / .
B n t. Exs. ; Cromb. n. 2. Sterigmata aud spermatia, x 500.
This is often less developed, with the thaHus granulose and diffract,
though when fully developed it is more squamulose and continuous. The
apothecia, for the most part, are very numerous and crowded, sometimes
nearly obUterating the tballu.s, smaller, aud becoming somewhat convex
and Iinmarginate in the less developed, or moderate, plane, with persistent
margin in the best developed conditions.
Hub. On cretaceous pebbles and limestone walls and rooks in moist
shady uMaud situations.—Dfsi;/-. Local, though plentiful, in S., W., and
Central England, amongst the Central and N. Grampians of Scotland,
and in N W Ireland.—B. AI.; Alaidstone, K e n t; Box Hill and Shiere,
Surrey ; Bathampton Downs and Babington, Somersetshire ; Chalford and
near Cirencester, Gloucestershire ; Buxton, Derbyshire; Egremont, Cum-
berland. Craig Tulloch, B lair Athole, Perthshire; Craig Guie, Braemar,
Aberdeenshire. Kylemore, co. Galway.
2. C. lecanopsoides Nyl. ex Cromb. Journ. Bot. 1874, p. 332.__
Thallus thin, opaque, granuloso-areolate, or nearly continuous, soraewEat
scabrous, dark-brown or brownish-black. Apothecia small,
urceolate, concolorous, th e margin prominent, connivent; spores 4 -
8n®, eUipsoid, 0 ,0 1 2 -2 0 mm. long, 0 ,0 0 6 -1 1 mm. thick, paraphyses
slender, not crowded ; hymenial gelatine bluish w ith iodine.—Leight.
Lich. F l. ed. 3, p. 35.— Pyrenopsis lecanopsoides Nyl. Flora 1866
p. 3 7 4 ; Carroll, Jo u rn . Bot. 1867, p. 2 5 4 ; Cromb. Lich. Brit. p. 3 -
Leight. Lioh. Fl. p. 15. Collema pyrenopsoides Nyl. Mem. Soc!
Cherb. v. p, 8 9 ; Syn. i. p. 203. Lecanora pyrenopsoides Nvl Bot
Not. (1853) p. 163. r j r y ■ ui.
This, as Nylander observes (Syn. p. 103), is at first sight not unlike
L.fuligtnea (Wahl.), and also has considerable resemblance to obscure
and less developed conditions of Lecanora cervma. In this country it
sometimes occurs associated with the preceding species, from which it is
distino-uished by tho thallus and the apotheoia ; though neither of these
are well developed iu the British specimens.
Jlab On calcareous rocks in maritime and upland tracts of mountainous
re'dons —Distr. Atery local and rare in S.AV. Ireland (near Kenmare, co.
Kerry) and the Central Highlands of Scotland.—B. AI. ; Craig Tullocli,
Blair Athole, Perthshire.
3. C. furfurella Nyl. ex Cromb. Journ. Bot. 1874, p. 332.—
Thallus effuse, very th in ly furfuraceo-granulose, or scattered in
small furfuraceous verruoæ, brownish-black or blackish, with somewhat
larger, convex granules intermixed. Apotheoia minute, sub-
pyrenodeo-leoanorine, impressed in the larger granules, concolorous ;
spores shortly eUipsoid, 0,011-17 mm. long, 0,008-11 mm. thick ;
paraphyses discrete; hymenial gelatine wine-red with iodine.—
Nyl. Flora, 1881, p. 453 ; Leight. Lioh. Fl. ed. 3, p. 8 5 .— Collema
furfurellum Nyl. Sallsk. pro F . et F l. Fenn. Not. iv. (1859) p. 229 ;
Lich. Soand. p. 28 ; Carroll, Jo u rn . Bot. 1865, p. 286 ; Cromb. Lich.
Brit. p. 3; Leight. Lioh. Fl. p. 17.
The anatomical structure of the thallus shows this plant, at one time
regarded by Nylander as a distinct section of Collema, to be a Collemopsis.
The thallus and fructification distinguish it from the allied species. The
apothecia are numerous, though the spores are rarely found fully developed.
The spermogones are only sparingly visible, the spermatia being
thm, oblongo-cylindrical.
Hah. On moist schistose rocks in alpine places.—Distr. Found very
sparingly amongst the S. Grampians, Scotland.—B. AI. ; Above Loch-na
Gat, Ben Lawers, Perthshire.
4. C. Arnoldiana Nyl. Flora, 1874, p. 305.—ThaUus effuse, th in ,
maculate, granulose, olive-brown or dark-brown. Apotheoia small,
biatorine, somewhat prominent, impressed in th e centre, reddish or
dark-red, the margin paler ; spores eUipsoid, oleoso-locular, 0,017-
20 mm. long, 0,010-0,0105 mm. th ic k ; paraphyses a rticu la te ;
hymenial gelatine sUghtly bluish, th en pale wine-red with iodine.—
Cromb. Journ. Bot. 1876, p. 359 ; Leight. Lich. F l. ed. 3, p. 36.—
Physma Arnoldiana Hepp, Flora, 1858, p. 94.
This somewhat resembles Leptogium hiatorinum, but is smaller, thinner,
and with different spores. The' thallus is minutely cellular, lax, and
indistinct in texture. The apothecia, which are nearly gyalectiforni, are
either somewhat scattered or approximate. Verrucaria Flotoviana Hepp,
Flecht. n. 92 pro parte, Collemopsis Flotoviana Nyl. ex Cromb. Journ. Bot.
1874, p. 147, scarcely differs from this species.
Hab. On calcareous stones in shady upland situations.—Dfsir. Apparently
local and rare in S. and AV. England.—B. AI. ; Near Shiere,
Surrey ; near Cirencester and Chalford, Gloucestershire.
5. C. oblongans Nyl. Flora, 1874, p. 305.— ThaUus subeffuse,
thin, granuloBO-crustaceous, confluent, brownish-olive. Apothecia