Physconia americana
Taxonavigation
edit| Taxonavigation: Caliciales |
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Superregnum: Eukaryota |
Familia: Physciaceae
Genus: Physconia
Species: Physconia americana
Name
editPhysconia americana Essl., 1994
Diagnosis: Thallus foliaceus, usque ad 8 cm diametro, superne griseus vel fuscus et plus minusve pruinosus; sorediis isidiisque destitutus; subtus ater, rhizinis squarroso-ramosus. Differta Physconia distorta stratum corticale superiorus paraplectenchymatum.
Type: U.S.A. Idaho. Kootenai Co.: near the south end of Lower Twin Lake; Douglas fir forest at ca. 760 m elev., on creekside cottonwood near road, 3 July 1990, Esslinger 11344 (DUKE, holotype; GZ, herb. Essl., isotypes).
Distribution: On bark or rock; presently known from Idaho, Washington, Oregon, and California, but probably somewhat more widely distributed in western North America.
World distribution: Western North America, southern Europe and northern Africa, Asia
References
edit- Essl., Mycotaxon 51: 91 (1994)
- Esslinger, T.L. (1994) New species and new combinations in the lichen genus Physconia in North America. - Mycotaxon 51: 91–99. (RLL List # 156 / Rec. # 5236 - Recent Literature on Lichens) (Web site) (Description of Physconia americana: pp. 91-92; black-and-white photo: p. 93, fig. 1)
- Brodo, I.M., Sharnoff, S.D. and Sharnoff, S. (2001) Physconia (pp. 560-566) In, Lichens of North America. Yale University Press, New Haven, 795 pages. (Description of Physconia americana and distribution map for North America: p. 561; full page color photo: p. 562, plate 676)
- Esslinger, T. L. (2002) Physconia (pp. 373-383) In: Nash III, T.H.; Ryan, B.D.; Gries, C. and Bungartz, F. (eds.), Lichen Flora of the Greater Sonoran Desert Region, Vol. 1. Lichens Unlimited, Arizona State University, Tempe, Arizona, 532 pages. (RLL List # 187 / Rec. # 23101 - Recent Literature on Lichens) (Description of Physconia americana and distribution map for the Sonoran region: p. 375)
Links to photos
edit- Stephen Sharnoff's Lichen Photos - Physconia americana