Common Green Shield

Description:

It is a medium to large foliose lichen grey when dry, distinctively yellow-green when wet. Surface typically with transverse wrinkles and laminar soralia. The rounded lobes, measuring 3–8 mm wide, usually have patches of granular soredia arising from pustules. The lobes of the thallus may be smooth, but quite often have a wrinkled appearance especially in older specimens. The lower surface is black except for a brown margin; rhizines attached to the lower surface are black and unbranched.

Habitat:

Widespread, conspicuous and locally common on trunks of deciduous trees and on other, generally base-poor, substrates. This one was found on the bark of a Holm oak

Notes:

Camera Model: NIKON D300 Exposure Time: 1/60 sec., f/3.5 ISO 200 Focal Length: 90.0 mm Objective lens: Tamron SP 90 AF f/2.8 72E.