Baden-Württemberg - Lichens of Wales

11* Thallus otherwise colored. Ap. very rare . 13
12 Thallus thickly covered with brown ap, without
isidia, thickly dwarf shrubby to almost cushionlike,
round, usually up to 2 cm wide and 1(1.5)
cm high, brown to dark brown, usually shiny,
underside only a little lighter. Almost always on
branches of birch, on planted Scots pine, wood. *
. C. sepincola
12* Thallus usually without ap., with marginal isidia
or isidiate border soralia, usually of little erect
irregularly curved, flat to concave, at the margin
consisting of undulating lobes, brown-olive to
dark brown, when moist olive-green, underside
light brown to whitish, wrinkled.
* C. chlorophylla
13 Thallus deep yellow to citron yellow, medulla
yellow, at the margin with swollen yellow border
soralia, with close lying, ascending margins, -5
mm wide lobes. Usnic acid, Vulpinic acid,
Pinastrinic acid Vulpicida pinastri
13* Thallus pale yellow-greenish or gray, bluish-
gray, brown-gray. Medulla white . 14
14 Thallus yellow-greenish to pale gray-greenish,
undersides whitish to light brown, K-, P-.
Medulla R-. Usnic acid, Protolichesterinic acid.
Rare montane/high montane species. Lobes -5
mm wide . 15
14* Thallus gray, bluish-gray, on exposed sites even
browned, undersides brown to black, with age
also white, usually large, lobes 0.5-2 cm wide.
Cortex K+ yellow. Atranorin 16
15 Thallus undersides brown, without pseudocyph.,
often with border soralia at the margin, robust,
rather close lying. Pycnosp. 7-11 x 0.8-1 µm.
Caperatic acid, (Lichesterinic acid)
* C. oakesiana
15* Thallus underside whitish to light brownish, with
isolated rounded pseudocyph., border soralia
often scarcely developed, thallus segment usually
clearly ascending at the margin. Pycnosp. 3-4.5 x
0.5-0.8 µm. * C. laureri
16 Thallus upper side without scattered white
puncti, smooth to often unevenly wrinkled,
sometimes dark flecked, lobes broad, often
curved, commonly not uniformly rounded,
strongly incised, often strongly ascending, at the
margins with soralia and/or coralloid isidia (then
often crinkled) or naked, underside dark brown to
black or black flecked, in moist sites even white
flecked or almost entirely white, with only
isolated rhizines. Medulla R-. Caperatic acid *.
Very variable species, commonly with
Pseudevernia and Hypogymnia physodes .
Platismatia glauca
16* Thallus upper side with fine white, scattered
puncti or short elliptical flecks (Pseudocyph.),
smooth, with broad, regularly rounded lobes, at
times bordered with white swollen border soralia
and above all here ascending, undersides black,
with scattered rhizines, brown at the margin,
without rhizines (Cetrelia olivetorum s.l.) . 17
17 Medulla C-, KC- or KC+ rose, K-, P-. ±
Perlatolic acid, ± Imbricaric acid.
* Cetrelia cetrarioides
17! Medulla C+/KC+ rose-red, K-, P-. Olivetoric
acid * . Cetrelia olivetorum
17* Medulla C-, KC+ rose, K-, P-. α-Collatolic acid,
Alectoronic acid * . Cetrelia chicitae
Ecology and Distribution of the Species
(Allocetraria Kurokawa & Lai)
Cetraria oakesiana Tuck. (Allocetraria o.
(Tuck.) Randl. & Thell)
In high montane, oceanic, very high precipitation
sites usually on conifer trees (spruce, fir),
commonly at the trunk base, on relatively
constant, v.-e.humid, cool, rather long time snow
covered habitats in the interior of beech-spruce
and spruce-fir forests, mostly in the
neighborhood of brooks and water falls,
r.acidoph., m.photoph.(-r.skioph.),
substrathygroph., anitroph., e.g. with
Menegazzia, Bryoria bic. (↑) - mieur-pralp –
v.rare (1); süSch (2x), Al
(Cetraria s. str.)
Cetraria aculeata (Schreber) Fr. (Cornicularia
a. (Schreber) Ach., C. tenuissima (L.) Zahlbr.,
Coelocaulon aculeatum (Schreber) Link)
In hill and montane, usually low precipitation to
moderately high precipitation sites on sandy soil,
level, sandy or fine gravel acid loam and stony
soil, even on calcareous soils, in openings in
silicate and lime turfs (Nardo-Callunetea,
Festuco-Brometea), in rock debris community.
(Seslerio-Festucion), in sandy meadow
(Corynephorion), in open Scots pine forest, stony
oak forest (Luzulo-Quercetum), always on well
lighted usually warm summer, sunny sites on dry
soil with sparse vegetation, v.acidoph.subneutroph.,
r.xeroph., r.-v.photoph., Char.
Cladonion arb., above all in Cladonietum fol. –
bor-med-mo – rare (2); above all RhSch and Pf,
also Vog, He, Th, Fr, v.rare nöRh, Rh-Mn-T,
Sch, O, Sp, Ju, Ries etc.
Cetraria ericetorum Opiz (C. crispa (Ach.)
Nyl., C. tenuifolia (Retz) R.H.Howe)
Like C. cucullata (↑), yet also on less extreme
wind exposed sites and more often even in
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