Lecidea
Family: Lecideaceae
Lecidea image
Frank Bungartz  
  • Greater Sonoran Desert
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Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2004. Lichen Flora of the Greater Sonoran Desert Region. Vol 2.
Life habit: lichenized; a number of species lichenicolous (but not known from the Sonoran region) Thallus: crustose to subsquamulose, rimose, areolate, bullate or (slightly) squamulose prothallus: often well developed, (greenish) black, dendritic (especially in high alpine morphodems), rarely white or often inconspicuous or indistinguishable surface: white, ivory, pale to rather dark gray, pale yellow or greenish gray to dark red brown or rusty colored (due to interspersed iron oxides), dull to glossy (due to a thick transparent epinecrotic layer); extremely rarely sorediate, isidia unknown medulla: white, I+ or I- photobiont: primary one a green trebouxioid alga, secondary one absent; cephalodia unknown Ascomata: apothecial, usually sessile (with an often well constricted base), rarely sunken between the areoles, black (discs rarely becoming blackish brown when fully moistened) or with a (bluish gray) pruinose disc; true exciple: usually persistent, with a small greenish or brownish black epihymenioid cortex and an usually unpigmented, opaque medullary part, composed of +radiating hyphae with subglobose to elongated cells, without algae epihymenium: bright green (pigment cinereorufa-green), olive, brown or black hymenium: hyaline, faintly green or very pale brownish violet, I+ blue or (in living material only) I+ reddish brown, 35-90 µm tall; paraphyses: simple or occasionally branched and anastomosing, apical cells usually markedly swollen; conglutinated subhymenium: hyaline or pale bluish green, 20-90 µm thick hypothecium: unpigmented, or pale ochre to dark blackish brown asci: clavate, Lecidea-type, moderately thick-walled, apically thickened, outermost gelatinous layer I+ blue, 8-spored ascospores: hyaline, constantly simple, often pseudodiblastic (due to a central plasma bridge), bacilliform, oblong, slender to broadly ellipsoid (rarely subglobose), smooth, lacking a perispore Coniomata: pycnidial, immersed, with usually lens-shaped to graphidoid ostioles conidia: hyaline, simple, bacilliform to (rarely) filiform Secondary metabolites: p-depsides of the orcinol-type with long aliphatic side-chains, ß-orcinol depsidones, and dibenzofurans Geography: Northern and Southern Hemisphere, often in temperate to cold habitats, preferentially in humid areas, or in semiarid climates Substrate: almost exclusively on acid and (more rarely) on calcareous rocks, rarely on consolidated sandy soil (exceptionally on hard timber, as old railway ties) or on gypsum. Notes: The name Lecidea derives from the Greek lekis (small shield) and eidos (shape), in reference to the appearance of the apothecia. A number of species (e.g. Lecidea atrobrunnea , L. fuscoatra, L. tessellata) are extremely variable. Damaged specimens (especially by snail-feeding) very often occur. Subsequent regeneration leads often to aberrant morphodems. Determination of specimens without well developed ascospores requires prior familiarity with the taxa. In addition to the 100 species of Lecidea s.s., there is quite a number of taxa of unclear taxonomic position described as Lecidea, including many taxa on bark and wood. Species in the latter group occurring in the Sonoran region are keyed ("Lecidea") and described below under B
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Species within checklist: Lichens of Alaska, USA || << 1 - 50 taxa >>
Lecidea albocaerulescens
Image of Lecidea albocaerulescens
Lecidea albohyalina
Image of Lecidea albohyalina
Lecidea alpestris
Image of Lecidea alpestris
Lecidea assimilata
Image of Lecidea assimilata
Lecidea atrobrunnea
Image of Lecidea atrobrunnea
Lecidea atrofulva
Image of Lecidea atrofulva
Lecidea auriculata
Image of Lecidea auriculata
Lecidea berengeriana
Image of Lecidea berengeriana
Lecidea brachyspora
Image of Lecidea brachyspora
Lecidea brouardii
Image of Lecidea brouardii
Lecidea carbonoidea
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Lecidea cinnabarina
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Lecidea conferenda
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Lecidea confluens
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Lecidea contigua
Image of Lecidea contigua
Lecidea coroniformis
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Lecidea cuprea
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Lecidea demissa
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Lecidea diapensiae
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Lecidea dicksonii
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Lecidea diducens
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Lecidea ecrustacea
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Lecidea elata
Image of Lecidea elata
Lecidea ementiens
Image of Lecidea ementiens
Lecidea flavocaerulescens
Image of Lecidea flavocaerulescens
Lecidea fusca
Image of Lecidea fusca
Lecidea fuscoatra
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Lecidea haerjedalica
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Lecidea hypnorum
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Lecidea hypocrita
Image of Lecidea hypocrita
Lecidea lactea
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Lecidea lapicida
Image of Lecidea lapicida
Lecidea leucophaea
Image of Lecidea leucophaea
Lecidea leucothallina
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Lecidea limosa
Image of Lecidea limosa
Lecidea lithophila
Image of Lecidea lithophila
Lecidea lucida
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Lecidea lurida
Image of Lecidea lurida
Lecidea macrocarpa
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Lecidea mollis
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Lecidea pallida
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Lecidea parasemella
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Lecidea paupercula
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Lecidea platycarpa
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Lecidea plebeja
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Lecidea pulcherrima
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Lecidea ramulosa
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Lecidea speirea
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Lecidea steineri
Image of Lecidea steineri
Lecidea subcandida
Image of Lecidea subcandida

This project made possible by National Science Foundation Awards: #1115116