I
II ■
i'i ^
165. L. alpina Somm. Suppl. F l. Lapp. (1826) p. 94 ; Nyl. Flora,
1869, p. 413.—Thallus indetermiuate, arcolaio or areolato-verru-
cose, greyish or leaden-greyish; areolæ rounded or angulose (K +
yellowish, th en reddish, CaCl— , medulla I + b lu ish ); hj'pothallus
black. Apothecia immersed or a t leu J h superficial, plane, reddish
or reddisli-black ; th e thalline margin prominent, subporsistent ;
sporos 8næ, ellipsoid or ovoid, 0 ,0 0 9 -1 3 mm. long, 0 ,0 0 6 -8 mm.
th ick ; paraphyses n o t discrete, brownish towards the apices ; h)'-
menial gelatine deep blue, th e theoæ a t length violet or wiuo-reddish
w ith iodine.—Cromb. Grevillea, xix. p. 57, non Leight. Grevillea, i.
p. 125.— Lecanora cinereo-rufescens Cromb. Lich. Brit. p. 55,
Leight. Lioh. Fl. p. 211, ed. 3, p. 197, is entirely referable to this
species.
A well-marked plant differing at once from all states of i . cinerea,
with which it is so far comparable, in the positive reaction of the medulla
with iodine. In the single British specimen, which is well fertile, the
areolæ are contiguous, tliough in more iiorthern regions they are often
discrete, when the hypothallus is more visible. The spermogones have
the spermatia cylindrical, straight, 0,004-6 mm. long, about 0,001 mm.^
thick. A closely allied species or perhaps only a variety is L. Myrini
Nyl. Flora, 1869, p. 413 (Parmelia Fr. Sum. Veg. Scand. (1845) p. 108),
distinguished chiefly by the yellowish thallus, the black apotbecia, and
the rather shorter spermatia. This is said by Leighton (Lich. Fl. ed. 3,
p. 173) to have been gathered at Barmouth ; but the specimen in Hh.
Salwey referred to in Grevillea, i. p. 125, is from Norway.
Hah. On a mica-schist rock in an alpine situation.—Bistr. Very local
and scarce on one of the S. Grampians, Scotland.—B: M. : Ben Lawers,
Perthshire.
166. L. cinereorufescens Nyl. Not. Sallsk. pro F. et FL Fenn.
Fiirh. n. ser. v. (I8 6 0 ) p. 137.—Thallus suhdeterminate, verrucose
or rimoso-areolate, pale or dark greyish (K—, CaCl—, medulla 1 +
bluish) ; hypothallus blackish. Apotheoia small or submoderato,
a t first in n ate and concave, th en somewhat prominent and plane,
brownish- or d a rk -red ; the th allin e margin entire ; spores 8næ,
ellipsoid, 0 ,0 1 2 -2 4 mm. long, 0 ,0 0 7 -1 6 mm. th io k ; paraphyses submoderate,
brownish a t th e incrassate apices ; hymenial gelatine
bluish, th e theoæ wine-red with iodine.— Cromb. Grevillea, xix.
p. 57.— Urceolaria cinereorufescens Aoh. Lioh. Univ. (1810) p. 677.
In some respects related to the preceding, but differs, among other
characters, in the negative reaction of the cortical layer with K. The
type has not jæt occurred with us, but only the following form.
Form diamarta Nyl. I. c.— Thallus oohraceo-reddish. Apothecia
with th e thaUine margin often flexuose.—Cromb. Lioh. Brit. p. 55 ;
Leight. Lioh. Fl. p. 211, ed. 3, p. 197.—Lichen d ia n ia r tu sY la h l.F i.
Lapp. (1812) p. 414. Lichen sinopicus Eng. Bot. t. 1776 (lower
magnified fig.).
469
“ i" oftrer similar instances, depends upon
n P u f tl ® ol peroxide ol iron m the substratum. In tlie British specin
ie in rp " " “ oroiis and at times angulose from mutual
¿m . io 7 , S t 0 , oe T n i S S ® ^
o , / 7 o mica-schist rocks in an alpine situation.—Djsi/'. Only
m ., i t „ . L „ h - » -G . (
M7. L. medens Nrl.riom, 1879, p. 361.-Th.ll™ aot,tmînato,
thick subverrucoso-unequal, rimoso-diffract, greyish ( K - , C aC l-
medulla I - ) Apotheoia small, innate, browuish-black, colourless’
within ; the th alh n e margin slightly prominent ; spores 8næ, sub-
globose OT ellipsoid, 0 0 0 9 - 1 4 mm. long, 0 , 0 0 7 - 9 mm. th ic k ; para-
r I t epitheoium b row n ish ; hymenial gelktine
sh JU ly WuLsh, then wine-red with iodine.— Cromb. Grevillea, xix.
p. Oi.— Lecidea recedens Tayl. in Mack. F l. Hib. ii ( 1 8 3 6 ) u 1 1 7
Lecanora s u J in e r e a J y L Flora 1 8 6 9 , p. 8 2 ; Cromb. J o S . Bot!
8- -• /i“ - 1 *
the subglobose spores
from tblP t I ff . I t approaches L. cinerelufescens, but
horn this it differs also m tne thicker thallus, the neg-ative reaction of the
medulla with lodme, and the shorter spores. Our British specimens are
ter the most part well fertile. Though describing it as a Lecidea Taylor
I. c. says th a t it is allied to Urceolaria cinerea. ^ ^ ^ ^cciUea, t aj lor
N 7 v a le 7 ’ N ® 7 7 r T * ' “ ! districts.-JN. Wales, JS. England, and VV. Ireland.—B. DisZr. Only in A I . ; Llyn Bodlvn Bar
mouth Alerioneth; Ilolwick Scar, Yorkshire. Huukerron, co Kerry •
Derryclare, Connemara, co. Galway. ’ ^ >
1 6 8 . L P e lo h j r y a Somm. Lapp. Suppl. ( 1 8 2 6 ) p. 9 9 ; Nyl. Lich.
Scand. p. 1 5 5 .— Thallns determinate, tartareous, thickish, aroolato-
verrucose the verrucæ gibbose or somewhat plaue, smooth, crowded,
■nhitish (K - - ,C a C l - ) . Apotheoia moderate, plane, slightly im-
mersed in th e areolæ, brownish-blaok; the thallino margin ra th e r
oblongo-ellipsoid,
0 0 2 3 - 3 0 mm long, 0 , 0 1 2 - 1 6 mra. th ic k ; hypothecium hroivnish:
blaok or b lack ish ; paraphyses slender; hymenial gelatine bluish
mI I i c h Fl. ed. 3 , p. 1 0 5 . - Aspicilia pelohotrya
Mudd lla ii P - 1 6 4 . Lecidea pelohotrya Cromb. Lioh. Brit. p. 8 0 •
Loight Lich Fl. cd. 1 , p. 2 9 8 . Urceolaria pelohotryon M'ahl in
Ach. Meth. Suppl. ( 1 8 0 3 ) p. 3 1 . ^
A rather peculiar species of this section, which from the dark hypothecium
might M taken for a Lecidea. The distinct thalline margin however,
of the upo J e c ia m well-developed specimens shows that it is a true
.a wliitish evanescent hypothallus, is
at h ist plane and continuous, becoming at length thickish and verrucose,