LichenIreland
  • Physconia enteroxantha (Nyl.) Poelt
Physconia enteroxantha
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(Map updated: 11 August 2009)

This clearly lobed, greenish-brown, foliose epiphyte is a species of well-illuminated trees in parkland or wayside situations. It resembles Physconia grisea in the size of the thallus (about 5-8cm on average) and in the slightly overlapping lobes much divided and pruinose (icing-sugar-like sprinkling) near the tips, and the marginal granular soredia. In P. enteroxantha, the soredia are coarse, pale brown or yellowy and the medulla is also of a dull yellow colour. This yellowness shows through the lobes giving the whole thallus a rather jaundiced look. When tested the medulla is K + yellow, not K- as in P. grisea. North and east Ireland mainly.

Key characteristics

  • Its overall dull yellow colour; the marginal soredia, yellowish and granular
  • Medulla and soredia, K + bright yellow.

Original text submitted by Vince J. Giavarini

 
 Simms, M. J., (2016). Physconia enteroxantha (Nyl.) Poelt. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=18940 Accessed on 2018-10-17.