The Lichens and Lichenicolous Fungi of Belgium and Luxembourg ...

THE LICHENS OF BELGIUM AND LUXEMBOURG. AN ANNOTATED CHECKLIST 87
portentosa (Dufour) Follmann
Syn.: Cladonia portentosa (Dufour) Coem., C.
impexa Harm., C. sylvatica α sylvestris a. tenuis
subf. condensata Aigret, C. subimpexa P. A.
Duvign., C. portentosa f. subimpexa (P. A.
Duvign.) Ahti
On humus and acidic soil in heathlands, among
rocks, also in open woodlands.
B Mar.: RR, Camp.: AC, Brab.: RRR, Mosan: R,
Ard.: AC, Lorr.: RRR. L Ard.: AR, Lorr.: R. F
Ard.: R.
C. subimpexa is a very rare chemotype with a conspicuous
grey colour and lacking usnic acid; it
was described from La Roche (B Ard.).
Lit.: La69: 132, Mü1: 149, NL84: 13, NL92: 169, Ramaut
et al. (1966), Van Landuyt & Hoffmann (1996).
rangiferina (L.) Nyl.
Syn.: Cladonia rangiferina (L.) F. H. Wigg.
Over siliceous and sandstone rocks, generally between
mosses.
B Ard.: AR-R→ RR, on the verge of extinction. L
Ard.: R, Lorr.: RR. F Ard.: RRR.
Lit.: La68: 75, La69: 132, NL92: 169, Sé: 137, Duvigneaud
(1938), Lambinon & Schumacker (1962).
stygia (Fr.) Ruoss
Syn.: Cladonia stygia (Fr.) Ahti
Ecology of the only reported collection unknown,
probably on soil in heathland.
B Ard.: RRR (†1936). L - .
Now extinct throughout the area of study.
Lit.: Sé: 141.
arbuscula (Wallr.) Hale & W. L. Culb. subsp. arbuscula,
syn. Cladonia arbuscula (Wallr.) Flot., C. sylvatica auct.,
non (Ach.) Rabenh. All the records of this taxon from the
area of study are likely to belong to C. arbuscula subsp.
squarrosa, but a chemical study of the whole material
still has to be done. The subsp. arbuscula is an alpine
taxon, which is unlikely to occur in the study area.
stellaris (Opiz) Brodo, syn. Cladonia stellaris (Opiz) Pouzar
& Vězda, C. alpestris auct., non (L.) Rabenh. Reported
from B by DG: 25, but relevant material not seen. Most
probably a misidentification.
CLADONIA P. Browne
caespiticia (Pers.) Flörke
On sandy or mossy soil, at the base of trees, or
more frequently over sandstone or siliceous
rocks, usually in shaded places.
B Brab.: RRR (1968), Mosan: RR, Ard.: R, Lorr.:
RRR. L Ard.: RR, Lorr.: RR. F Ard.: RRR.
Lit.: La69: 142, Mü1: 148, NL77: 19, NL92: 169,
Diederich (1985b: 30).
callosa Harm.
Syn.: C. fragilissima Østh. & P. James
On shale debris by a road.
B - . L - . F Ard.: RRR. Most probably overlooked
throughout the Ard. district.
Lit.: L8.
cariosa (Ach.) Spreng.
On sandy, ± calcareous soil, also found on industrial
soil slightly contaminated with heavy
metals (Pb and Zn).
B Mosan: RR, Ard.: RR. L Lorr.: RRR.
Lit.: La69: 142, L8, Mü1: 146, NL87: 20, Diederich
(1985b: 30).
cenotea (Ach.) Schaer.
Syn.: C. uncinata Hoffm.
On mosses and plant debris over siliceous rocks in
a Quercus wood.
B Ard.: RRR. L - . Overlooked ?
Lit.: DG: 27, L8, Aigret (1901: 138).
cervicornis (Ach.) Flot. subsp. cervicornis
Syn.: C. verticillata (Hoffm.) Schaer. var. cervicornis
(Ach.) Flörke
On sandy soil, often in heathlands.
B Camp.: RRR, Mosan: RRR, Ard.: R. L Ard.: RR,
Lorr.: RRR.
Lit.: DG: 30, Mü1: 147.
cervicornis subsp. pulvinata (Sandst.) Ahti
Syn.: C. rappii auct., non A. Evans
On sandy soil, over siliceous, natural outcrops and
over slate debris in disused quarries.
B Camp.: RRR, Ard.: R. L Ard.: RRR.
Lit.: La69: 139, Schl: 56-57, 204, Sé: 137.
cervicornis subsp. verticillata (Hoffm.) Ahti
Syn.: C. verticillata (Hoffm.) Schaer.
Over sandy or humus-rich soil, in heathlands, bogs
or over siliceous, natural outcrops, also found in
disused quarries and on industrial soil contaminated
with heavy metals (Pb and Zn).
B Mosan: RR, Ard.: AR, Lorr.: RRR. L Ard.: RR,
Lorr.: RR. F Mosan: RRR.
Lit.: Mü1: 147, NL92: 169, Vanek (1976).
chlorophaea (Sommerf.) Spreng.
On recently disturbed soil, peat, humus and rotting
logs, in open places, rarely on trees inside forests.
B Camp., Mosan: AR, Ard., Lorr.: AC. L AC. F
Mosan: RRR, Ard.: AC.
Lit.: La69: 139.