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Cetraria ericetorum ssp. reticulata (Räsänen) Kärnefelt

Data Set Maintenance: Data set compiled (from Sonoran Desert Lichen Flora Vol. 1). Data set author(s): Bungartz F. (02-10-11). Data set to be published after submission; February 2002.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: subspecies. Currently accepted name Cetraria ericetorum subsp. reticulata (Räsänen) Kärnef. Cetraria. Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Type Information: Basionym: Cetraria tenuifolia var. reticulata Räsänen. Type: Cetraria ericetorum subsp. reticulata (Räsänen) Kärnef.

Taxonomic Literature: Kärnef. Opera Botanica 46: 82 (1979).

Biogeography: Boreal and temperate; subalpine and alpine. Continent: Northern America (western). Checklist records: Sonoran Desert and United States and Canada (continental).

Ecology: Biotroph; lichenized; terricolous, bryophytic, rarely lignicolous (rarely), or corticolous; growing partially shaded or fully shaded, under conditions which are moist or wet.

Lichen Photobionts: Primary photobiont present; chlorococcal. Primary photobiont taxonomy: Trebouxia; Trebouxiaceae; Trebouxiales.

Thallus: Fruticose, subdivided into main (lobed branches) parts, irregular, dispersed throughout and distinctly seperate; lobes ascending; erect, branches cylindrical (canaliculate); compressed (strongly flattened). Thallus Outline: Irregular. Upper Surface: Matt or glossy (shiny), smooth or rough; foveate; convoluted; pseudocyphellate; pseudocyphellae peripheral, marginal; wrinkled; eciliate; not isidate; papillate (along the lobe margins), papillae cylindrical; not sorediate. Lower Surface: Present, brown (dull to light) or brownish red (basal); not attached, thallus vagrant; cyphellate (confined to the margins); wrinkled; not rhizinate.

Upper Cortex: Present; eucortical; prosoplectenchymatous or paraplectenchymatous (pachydermatous); double-layered; epicortex present; non-porous (i.e., forming a syncortex). Medulla: Loose. Lower Cortex: Present; eucortical, paraplectenchymatous (upper layer, pacydermatous) or prosoplectenchymatous (lower layer), of anticlinal (upper layer, pacydermatous) or periclinal (lower layer) hyphae.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, forming all across the thallus surface or directly at the thallus margin, all across the surface or along the margin of the thallus parts, independently from the host thallus or mycelium, soon sessile (pedicellate), moderately abundant. Margin: Smooth, persistent, distinct. Disk: Excavate (initially), plane, or weakly convex (in old apothecia), dark brown or olive, epruinose. Exciple: White. Epithecium: Apical cells brown (to brownish yellow). Hymenium: White. Hypothecium: White.

Asci: Clavate; dehiscence lecanoralean.

Ascospores: c. 8 per ascus, spores 8 per ascus, broadly ellipsoid or ellipsoid, 5-9 µm long, 2.5-4 µm wide, obtuse; septa absent.

Conidiomata: Present; immersed, adnate, or sessile; formed on projections, all accross the thallus surface or along the thallus periphery; supporting structure: present, located along the thallus periphery.

Conidia: Citriform; 6-7.5 µm long; 1 µm wide.

Secondary Metabolites: Present; only in the upper part of the cortex, lichesterinic acid or protolichesterinic acid.

Spot Tests: Cortex: KC –, C –, KC –, PD – medulla: K –, C –, KC –, PD –.

UV-Fluorescence: Upper thallus surface – (negative).

(report generated 04.Okt.2007)

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