Baden-Württemberg - Lichens of Wales

44* Thallus not typically sorediate 45
45 Thallus white-yellow to yellow, usually pruinose,
with very uneven upper surface of convex to
almost spherical or even flattened, ± attached
areoles/granules, thick to very thick. Ap. brownorange,
at first concave, then flat, with yellow,
often pruinose proper margin and swollen,
permanent, ca 0.2 mm thick pruinose thalloid
margin, -1.5 mm. Sp. 10-15 x 6-8 µm. On walls
. C. ruderum
45* Thallus (orange)yellow to ochre-yellow, not
pruinose, areolate, areoles -1 mm, thick, of
granules to elongate narrow cushions of (40)50-
100 µm diameter, moderate to very thick. Ap.
orange to orange-red, soon moderately convex,
with depressed, usually soon regressing,
commonly same-colored, nonpruinose proper
margin, often covered on the outer side with
thallus granules, -0.6(0.9) mm . C. coronata
46 On silicate rock 47
46* On lime-rich rock, mortar, concrete 51
47 Thallus gray-rose to (yellowish)cinnabar red,
small, -1.5 cm, cracked areolate, areoles
conspicuously flat, smooth, usually somewhat
enlarged at the thallus margin, -1.5 mm. Ap.
carmine-red, at first punctiform, then flat, usually
angular, indefinitely margined, -0.4 mm. Sp. 7-
11 x 4-6 µm C. rubelliana
47* Thallus not gray-rose to cinnabar red . 48
48 Septum thin, -2(3) µm. Sp. 12-23 x 5-7.5 µm.
Thallus thin, areolate to indefinite, citron-yellow,
yellow, yellow-gray. Areoles flat to somewhat
raised and there lighter at the margin. Ap. -0.6(1)
mm, often crowded into groups. Disk orangeyellow
to ochre, flat, with permanent, entirely
yellow margin and often with outer layer
depressed, sometimes granular thallus “collar”.
Relation to C. ferrarii (Bagl.) Jatta yet unclear
. ! C. crenulatella
48* Septum thicker . 49
49 Ap. yellow to olive-yellow, flat to convex, often
with lighter margin, -0.5 mm. Thallus light
yellow, yellow, citron-yellow, thin, smoothed,
coherent to fleckwise developed. Sp. 9-15 x 4.5-
7.5 µm C. vitellinula*
49* Ap. disk orange, orange- to rust brown . 50
50 Thallus orange yellow to yellow-brown, areolate
to almost lumpy, areoles ± angular, usually 0.2-
0.4 mm. Ap. orange to red-orange, with
depressed, finally indefinite, same-colored proper
margin, -0.3(0.5) mm. Sp. 9-15 x 4.5-8 µm.
Septum ¼-1/2 of the sp. length
. C. irrubescens
50* Thallus citron-, green- to gray-yellow, ochre, pale
yellow-(whitish), weakly cracked to usually
cracked-areolate, areoles flat to concave, often
grazed by snails. Ap. brown- orange to rustbrown
(color clearly contrasting from the thallus,
thereby the thallus ± two colored), with usually
somewhat lighter, orange colored proper margin,
sometimes with outer layered thallus margin,
which thins out very soon and only remains
recognizable only in section, -1(1.3) mm. Sp. 12-
19 x 7-10(11) µm. Septum 1/3 - 1/2 of the sp.
length C. flavovirescens
51 Ripe sp. 4-celled, 11-19 x 5-8 µm (Sp. ).
Thallus light yellow, light ochre, white-gray with
yellowish flecks, smooth to finely cracked, thin.
Ap. yellow- to brown-orange, with yellow/orange
proper margin, at first concave, then flat, -0.7 mm
C. ochracea
51* Sp. 2-celled 52
52 Septum very thin. Lichens usually on mortar .
C. crenulatella (48)
52* Septum thicker, ¼-1/2 the sp. length . 53
53 Thallus green-yellow, citron yellow, gray-yellow
to pale yellowish, often grazed upon and whitish
in places, weakly cracked to cracked-areolate
(areolate-squamulose), with the ap. becoming
“two colored.” Ap. -1.5 mm, orange-brown, with
usually lighter, orange colored proper margin and
sometimes outer layer of the thalloid margin,
sitting up. Sp. 12-19 x 7-10(11) µm. (Hyp. in
the region commonly not/scarcely inspersed).
Only on the upper surface of leached limestone
C. flavovirescens
53* Thallus usually deep yellow to orange, even
ochre-yellow, very variable, coherent to cracked
areolate or almost squamulose, sometimes even
reduced, not becoming two-colored. Ap. -1mm,
usually orange, margin often somewhat lighter
than the disk, but commonly not clearly other
colored, soon convex and marginless. Sp. 10-16
x 6-9(10) µm. (Hyp. not or ± inspersed). (C.
dolomiticola s.l.) . 54
54 Living on endolithic Verrucaria species, small, -
1.5 cm . 10
54* Not on endolithic Verrucaria species . 55
55 Parasitic on epilithic crustose lichens, e.g.
Acarospora species. Thallus areolate, almost
small squamulose, with ca. 0.5 mm large,
scattered or in several groups or areoles. Ap. -
1.5(2) mm . C. inconnexa (9)
55* Commonly not parasitising other lichens.
Thallus cracked areolate to mostly areolate, thick
to thin and disappearing, even granular. Areoles
0.2-2 mm with uneven upper surface, often
grazed upon. Ap. -1(1.5) mm, sessile to sunken.
Very variable species. Ap. size and thallus
condition very distinctive . ! C. dolomiticola
Ecology and Distribution of the Species
Caloplaca albolutescens (Nyl.) Oliv.
Like C. teicholyta (↑), but predominantly on
sandstone, scarcely on mortar – mieur-med – rare
(3); Ne, Rh, süSch, Hü
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