• Lepraria jackii Tønsberg
Lepraria jackii
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This blue-white to grey powdery lichen favours acid-barked trees such as birch and alder, but especially conifers and conifer plantations. Spot tests K+ yellowish, all else negative. It has fine powdery granules. White hyphae are rather clingy so are abundant in the crevices in the substratum. However, they do not form a hypothallus. In Ireland, it occurs mainly in the north and west.

Key characteristics

  • Thallus blue-white to grey; all reactions negative except K+ yellowish
  • Granules fine, powdery; hyphae cling to crevices; very acid-barked trees.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Lepraria jackii Tønsberg. [In] LichenIreland. Accessed on 2018-08-16.