Baden-Württemberg - Lichens of Wales

places, very thin, KC+/C+ (transient) red-orange
or rarely KC-/C-; sorediate places orange to
reddish, in the herbarium gray-white to
yellowish, UV+ light yellow to white.
Gyrophoric acid or Schizopeltic acid or both
Opegrapha gyrocarpa
21* Thallus cocoa-brown, brown, dark brown, with
smooth, almost velvety upper surface, in the
interior sorediate, ochre-yellowish, rarely
brownish, in the herbarium usually yellowbrown,
or yellowish, usually thick, KC-/C-,
sorediate places/medulla UV+ blue-white.
Schizopeltic acid Lecanactis umbrina
22 Thallus upper surface entirely leprose, i.e. mealy
or covered with fine granules, whitish, light gray,
pale greenish, slightly yellow tinted, or bluishwhite
. GS Lepraria
22* Thallus upper surface not entirely leprose. .. . 23
23 Thallus K+ red 24
23* Thallus K+ yellow to K- 25
24 Thallus whitish to light gray, with irregular
whitish soralia, thin Phlyctis argena
24* Thallus gray, olive-gray, or olive, fissured to
areolate, with bordered soralia .
↑ Aspicilia and Pertusaria excludens
25 Soralia convex, very large, white, KC+ violet.
Thallus gray Pertusaria amara
25* Soralia KC- or KC+ yellow, orange to red . 26
26 Thallus or soralia C+ red or C+ (at least KC+)
(yellow)orange . . 27
26* Thallus or soralia C- to C+ yellowish 36
27 Thallus C+ yellow-orange to orange 28
27* Thallus or soralia C+ red . . 30
28 Thallus P+ orange-red, K+ (weak) yellowish,
strongly developed, usually extensive, fissured to
warty, gray- or greenish-yellow, or greenish gray,
with irregular, partially coalescing, lighter
soralia. Soredia over 35-90 µm. Thiophanic
acid, Stictic acid Pertusaria flavicans
28* Thallus P+ yellow(ish), K+ yellow 29
29 Thallus whitish to gray-white, usually rosetted to
rounded, areolate, C+ yellow-orange, UV+
yellow. Areoles convex, sometimes with
enlarged marginal areoles, often on a whitish
prothallus. Soralia rounded, whitish(gray).
Sordidon, Rocellic acid, Atranorin
. Lecanora lojkaeana
29* Thallus gray, greenish-gray, thin, without
enlarged marginal areoles, C+ orange, UV+
orange. Soralia pale yellowish to almost whitish.
Atranorin, Arthothelin, Thuringion .
Lecidella scabra
30 Thallus gray-rose to light (gray)brown, of convex
areoles, with dark red-brown, warty cephalodia
between them. Soralia whitish to brownish. In
montaine to alpine places .
Amygdalaria panaeola
30* Thallus without cephalodia . 31
31 Soralia P+ yellow, C+ (fleeting) red, K+ yellow.
Thallus gray-brownish to brown, of rounded,
scattered to coalescing areoles, on a black
prothallus. Alectorialic acid .
Fuscidea praeruptorum
31* Soralia P- to P+ indefinite yellowish. Gyrophoric
or lecanoric acid 32
32 Thallus with whitish, defined soralia on
isidia-like, peg-form to hemispherical
outgrowths, soralia likewise standing on
outgrowths, -0.5 mm. Thallus areolate, areoles
convex, rarely flat, coalescing or ± separated,
upon a black prothallus, (cocoa)brown, rosebrown,
gray-brown, or yellow-brown, C+ red
(Gyrophoric-acid). Isidia-like outgrowths 0.15-
0.25 mm wide, -0.5 mm high
Rimularia gibbosa
32* Thallus without isidia-like outgrowths . 33
33 Thallus warty-areolate, areoles on a black
prothallus, with green-whitish (to
yellow-whitish), -0.5 mm wide fleck soralia, gray
to greenish-gray, K+ yellow, soralia C+ red.
Atranorin, Gyrophoric acid. Rinodina aspersa
33* Thallus without black prothallus 34
34 Thallus greenish-gray to gray, warty to coarse
granular, with at first delimited, later coalescing,
dirty gray-green to dusty blue-green soralia.
Gyrophoric acid GS Trapelia
34* Soralia whitish to pale green-whitish or beige. 35
35 Thallus thin to moderately thick, whitish to beige,
even sometimes with slightly rose tinted, usually
relatively small, fissured to fissured areolate, is
places erupting sorediate, K-, P-. Above all on
rock, or shaded rocks. Gyrophoric acid
GS Trapelia
35* Thallus usually moderately to very thick, whitish
to light gray, unevenly fissured to fissured
(fissured areolate), extensive. Prothallus
sometimes occurring, whitish. Soralia flat or
convex. Lecanoric or Gyrophoric acid .
GS Pertusaria
36 Thallus at least in places rust colored ochre to
red-brown or almost red. GS Lecidea
36* Thallus not rust colored 37
37 Soralia blackish to dark gray 38
37* Soralia lighter . 39
38 In the mountains on light and wind exposed
places. Thallus fissured areolate to (warty)
areolate, soralia blackish. Medulla I-, P-/P+
yellow. Miriquidic acid, ± Psoromic acid .
Miriquidica nigroleprosa
38* On more sheltered, often shaded places also on
lower sites. Thallus fissured, soralia gray.
Medulla K+ blue. Medulla/soralia P-.
Confluentic acid. (If Stictic acid, P+ yellow,
medulla I-: P. soredizodes) . .
Porpidia tuberculosa
39 Thallus or soralia P+ red to orange. Thallus
coherent, white to light gray. . . 40
39* Thallus and soralia P- to P+ yellowish 41
40 Soralia small, -0.5 mm rounded. Thallus often
very small, very thin. Stictic acid
59