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Lecidea cruciaria Tuck.

Data Set Maintenance: Data set standard item. Data set author(s): Hertel H. (99-01-01). Data set not revised.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Lecidea. Synonyms:-; Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Tuckerman E., Synopsis North Amer. Lich. 3: 67 (1888); type specimen label data: U.S.A., California, Santa Cruz, comm. Sprague (FH-Tuck, holotype).

Taxonomic Literature: Hertel H., Decheniana 127: 64 (1975).

Biogeography: Colline. Continent: Northern America (USA: Cal).

Ecology: Biotroph; lichenized; endosubstratic or episubstratic; substrate non-calciferous.

Thallus: Not subdivided parts, continuous throughout or dispersed along the periphery, continuous in the centre; lobes angular at the front; separate thallus parts 0-.15 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted. Thallus Outline: Margin concolorous the thallus centre. Upper Surface: White, plane; not sorediate; without thalloconidia thalloconidia.

Medulla: Iodine reaction in Lugol's solution negative.

Ascocarps: Soon sessile, slightly constricted or strongly constricted at the base, 12-30 per cm², .7-1.3-(2.4) mm in diam.. Margin: Not flexuose, persistent or excluded, 50-100 µm wide, epruinose. Disk: Plane to strongly convex, black, without an umbo. Exciple: Grey; inspersed with crystals. Epithecium: Apical cells turquoise. Hymenium: 45-60 µm high; white; iodine reaction: Lugol’s positive. Subhymenium: 0-45 µm high; white or pale green. Hypothecium: White or brownish yellow.

Ascospores: Ellipsoid or oblong, (10)-12.6-14.8-(17) µm long, (3.5)-4.7-5.4-(6.5) µm wide; wall not ornamented.

Conidia: (6)-6.5-7.5-(8) µm long.

Spot Tests: Medulla: K –, C –, PD – ascocarp margin (in section): K –, C – disk: C – hypothecium: K + purplish brown (chinoide reaction); epihymenium: K –.

(report generated 04.Okt.2007)

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