Botanische Staatssammlung München © 1995–2008
Data remain intellectual property of the data set authors.

Lecidea leucothallina Arnold var. leucothallina

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

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

Type Information: Protologue: Arnold F., Verhandl. Zool.-Bot. Ges. Wien 29: 382 (1879); type specimen label data: Austria, Tirol, Ötztaler Alpen, an Glimmerblöcken der begrasten Höhe beim Kühkampleseck östlich oberhalb Gurgl, 2350 m, 13 August 1878, F. Arnold (Arnold, Lich. Exs. 760: M, lectotype).

Taxonomic Literature: Magnusson H., Ark. Bot. 33a: 54-55 (1946); Magnusson H., Ark. Bot. 2(2): 120 (1952); Lettau G., Feddes Repert. 56: 241 (1954); R.A. Anderson R.A., The Lichen Genus Lecidea in Rocky Mountain National Park, 99-103 (Diss. Univ. Colorado, Boulder; 1964); Anderson R.A., Bryologist 68: 56-57 (1965); Hertel H., Mitt. Bot. München 12: 133-134 (1975); Hertel H., Mitt. Bot. München 17: 174 (1981); Hertel H., Herzogia 5: 452-453 (1981); Clauzade G., Roux C., Bull. Soc. Bot. Centre-Ouest, nouv. ser., num. spec. 7: 481 (1985); Andreev M.P., Antonova I.M., Novit. Syst. Plant. Non Vasc. 26: 97 (1989); Hertel H., Mitt. Bot. München 30: 310 (1991); Hertel H., Biblioth. Lichenol. 58: 163 (1995); Goward T. et al., Bryologist 99: 444 (1996).

Biogeography: Alpine. Continent: Europe (Au, It, Su) and Northern America (Greenland, Canada, USA).

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

Thallus: Areolate (primarily areolate), subsquamulose, continuous throughout, dispersed along the periphery, continuous in the centre, or dispersed throughout and distinctly seperate; lobes angular or rounded at the front; separate thallus parts.2-.4 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted or rarely basally constricted. Upper Surface: Lemon (citrine) or brown (pale beige to very pale brown), plane or convex; not sorediate; without thalloconidia thalloconidia.

Upper Cortex: Epicortex present. Medulla: Iodine reaction in Lugol's solution negative.

Ascocarps: Forming rarely on the pro- or hypothallus, soon sessile, slightly constricted or strongly constricted at the base, 12-180 per cm², .6-1.3-(2.3) mm in diam.. Margin: Not flexuose or slightly flexuose, persistent or excluded, 30-60 µm wide, epruinose. Disk: Plane or weakly convex to rarely strongly convex, rarely black or brown, epruinose, pruina scarce or abundant, without an umbo. Exciple: Hyphae radiating outwards; 3.5-5 µm wide; grey or brown; not inspersed with crystals or inspersed with crystals. Epithecium: Apical cells olive or black, cell pigment reacting with 10% HCl (in H2O). Hymenium: 40-(mean: 43-49)-55 µm high; white; iodine reaction: Lugol’s positive. Subhymenium: 5-(mean: 12-17)-27 µm high; white. Hypothecium: Brown or dark brown.

Ascospores: Ellipsoid or oblong, (5)-6.6-10.4-(14) µm long, (3.2)-4-4.7-(6) µm wide; wall not ornamented.

Conidia: (11)-13.5-16.5-(20) µm long.

Secondary Metabolites: Not detected.

Spot Tests: Medulla: K –, C –, PD – (TEST!!) or + orange (control cortex microscopically!); ascocarp margin (in section): K –, C – disk: PD + orange; hypothecium: K – epihymenium: K –.

(report generated 04.Okt.2007)

In case that additional characters and states are required to be included in this data set, consult the LIAS Instructions to Participants and follow the procedures described there.