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

Physconia americana Essl.

Data Set Maintenance: Data set authentic and standard item. Data set author(s): Esslinger T. (99-11-16). Data set not to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Physconia. Physciaceae Zahlbr. (1898).

Taxonomic Literature: Esslinger, T., Mycotaxon 51: 91-99 (1994).

Biogeography: Continent: Asia-Temperate, Europe, and Northern America. Checklist records: Sonoran Desert and United States and Canada (continental).

Ecology: Corticolous; substrate non-calciferous (rarely).

Thallus: Foliose, lobed; lobes linear or irregularly flabellate; plane; separate thallus parts 1-2-(3) mm wide. Thallus Size and Differentiation: Up to 10 cm in diameter; apex not curved. Upper Surface: Grey, brown, or grey-brown; pruinose; pruina usually abundant; continuous or sometimes patchy (especially on lobe ends); without hairs; not isidate; not sorediate; not lobulate or lobulate (irregular lobules occasional, sparse to rarely abundant). Lower Surface: Black or brown in the centre, white or pale brown along the margin; rhizinate; rhizines moderately abundant, black, branched, squarrosely branched.

Upper Cortex: Outer cortical layer paraplectenchymatous. Medulla: White. Lower Cortex: Present; prosoplectenchymatous, of periclinal hyphae.

Reproduction Strategy: Usually with sexual (and possible asexual) stages. Ascocarps: Abundant, up to 3 mm in diam.. Margin: Often lobulate, smooth.

Ascospores: 26-36-(38) µm long, 15-19 µm wide.

Secondary Metabolites: Not detected.

Spot Tests: Absent reactions.

(report generated 13.Nov.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.