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Baden-Württemberg - Lichens of Wales

Baden-Württemberg - Lichens of Wales

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yellowish-green to olive green, P+ red. Ap.<br />

lacking. On soil in dry warm sites (if undersides<br />

white, small foliose (Cladonia) .<br />

Cladonia foliacea s.l.<br />

14* Thallus ± rosette, lobed at least at the margin,<br />

closely appressed or ascending at the margins,<br />

upper side pale yellowish-green, whitish green,<br />

or yellowish, undersides ± whitish, P-, medulla<br />

P- or P+ yellow. Commonly with ± brown ap.<br />

with thalloid margin . Lecanora PT 1<br />

15 Thallus usually -2, rarely 3 cm wide, rosette,<br />

closely attached, interior with <strong>of</strong>ten coalescing<br />

fleck soralia, underside black. Lobes narrow,<br />

flat, delicate, K+ weakly yellowish. Medulla R-.<br />

Above all on acid bark or wood, very rarely on<br />

rock. Parmeliopsis ambigua<br />

15* Thallus with other characteristics (if habitat<br />

similar to the previous species, then the medulla<br />

and soralia K+ orange, P+ orange), underside<br />

pale or brown to black . Parmelia<br />

16 Moist thallus gelatinous swelling, dry very<br />

inflexible, gray, or brown to black. With<br />

bluegreen algae. Algae not arranged in a layer<br />

Key III<br />

16* Moist thallus not gelatinous . 17<br />

17 <strong>Lichens</strong> attached to limestone, mortar, or<br />

concrete . 18<br />

17* <strong>Lichens</strong> on other substrates 19<br />

18 Thallus without rhizines, in the main attached to<br />

the rock only by a ± central post (navel), otherwise<br />

± free, usually little organized and ± one<br />

lobed or rarely many lobed, without soralia or<br />

isidia . Dermatocarpon miniatum<br />

18* Thallus attached at numerous sites by rhizines,<br />

divided deeply into many or few narrow lobes,<br />

usually with soralia or isidia GS Physcia<br />

19 Thallus in the main only attached by a ± centrally<br />

located post (navel) on (silicate) rock, otherwise<br />

± free, usually little organized and ± single lobed<br />

or rarely many lobed (umbilicate lichens) . 20<br />

19* Thallus not attached by a ± central navel, on<br />

rock, bark, mosses or peat . 21<br />

20 Thallus upper side with punctiform small, sunken<br />

black perithecia, gray-white to brownish,<br />

underside ± brownish to rose, smooth to slightly<br />

wrinkled, without rhizines. Sp. colorless, single<br />

celled Dermatocarpon<br />

20* Thallus sterile or with black shield form ap.,<br />

whitish-gray, brown, or black-brown, underside<br />

pale brown to black, with or without rhizines,<br />

smooth, warty or channeled. Sp. one-celled to<br />

muriform, colorless or brown. GS Umbilicaria<br />

21 Thallus lobes welded into one almost schield-like<br />

thallus, closely attached, gray-blue, <strong>of</strong>ten with<br />

filamentous prothallus, with bluegreen algae.<br />

Extremely rare, on high oceanic habitats . Degelia<br />

21* Thallus otherwise . 22<br />

22 Thallus lobes arched at the ends into flat to<br />

saddle form, undersides free ap., generally at<br />

least 2 mm wide, undersides with veins or hairy<br />

or bald. With bluegreen algae, rarely with green<br />

algae, then the thallus in the moist state deep<br />

green . 23<br />

22* Thallus lobes without such terminal ap. . 24<br />

23 Ap. on the upper side <strong>of</strong> the usually ascending<br />

lobes, flat or saddle form. Underside with coarse,<br />

branched and reticulate veins as well as with<br />

tufted rhizines or scattered long single rhizines,<br />

rarely uniformly felty, without cortex. Sp.<br />

narrow spindle like to needle form, four to many<br />

celled cross septate, brown, at least 30µm long .<br />

Peltigera<br />

23* Ap. on the underside <strong>of</strong> the lobes, but <strong>of</strong>ten<br />

opening later, not saddle form, red-brown.<br />

Underside not with such veins, but sometimes<br />

wrinkled, bald or velvety hairy, beige, pale<br />

brown, rarely to black-brown, with cortex. Sp. 4celled,<br />

fusiform, pale brown, up to 27 µm long<br />

Nephroma<br />

24 Underside <strong>of</strong> the thallus orange-red. Alpine soil<br />

lichen . Solorina crocea<br />

24* Underside <strong>of</strong> the thallus not orange-red . 25<br />

25 Ap. sunken in definite rough depressions <strong>of</strong> the<br />

thallus, without thalloid margin. Thallus gray,<br />

green when moist, at times developed as only a<br />

ring around the ap., with green algae, in addition<br />

with bluegreen algae in parts <strong>of</strong> the thallus. Sp.<br />

brown to red-brown, 2-celled by a septum.<br />

Solorina<br />

25* Ap. not in excavated depressions . 26<br />

26 Lichen lobes over 5 mm wide. Relatively large<br />

lichens 27<br />

26* <strong>Lichens</strong> with narrower lobes 37<br />

27 Underside <strong>of</strong> the thallus with stout, branched and<br />

reticulate, raised veins as well as isolated to<br />

usually bushy rhizines, without cortex, therefore<br />

<strong>of</strong>ten ± felty rough and dull. Thallus broad<br />

lobed, ap., if occurring, at the ends <strong>of</strong> the lopes,<br />

flat to saddle-form. Lobes broad. Sp. 4-8celled,<br />

colorless to brown. Usually on soil and mosses,<br />

rarely directly on bark . Peltigera<br />

27* Underside <strong>of</strong> the thallus without raised vein net,<br />

<strong>of</strong>ten however rugose, at times with arched<br />

structures, which are divided by engraved<br />

depressions . 28<br />

28 Thallus underside bald, without rhizines<br />

(examine carefully!), without hairs, smooth to<br />

engraved or felty 29<br />

28* Thallus underside with distinct rhizines or<br />

densely hairy 31<br />

29 Thallus upper side divided by wide meshed<br />

reticulate ridges with ± oval to elongate<br />

depressions lying between them, light brown,<br />

olive-brown, or greenish-olive, greenish when<br />

moist, underside usually beige to pale brownish,<br />

the upper side pits corresponds to the underside<br />

by ± wrinkling “pits” leading to arches .<br />

Lobaria (pulm./lin.)<br />

29* Thallus upper side smooth to slightly wrinkled<br />

30<br />

40

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