A fruticose species with long (4-7 cm., occasionally longer) cylindrical branches, ca. 1mm diam. and dark-brown to black in colour (but the tips paler). Lateral spinules 2-7mm long are numerous, arising at right-angles to the main stems. Soralia are present arising from pseudocyphellae. Soredia are often sparse, but a characterisic of the species is that they are mixed with short spinules arising in tufts from the soralia. Apothecia and pycnidia are unknown.
Chemical Tests: C-, K-, KC-, Pd-
This is a well-defined species characterised by its soredia mixed with short spinules and the Pd- chemical reaction. It most resembles B. bicolor, but that species lacks soralia, is Pd+ red and rarely grows on trees.
|Location||Grid Reference||Last Rec'd||Recorder(s)||SSSI|
|Caernarfon: "New Glyder"||SH 65||1788||?|
|Meirionydd: Moel y Ffridd||SH 54||1923||D.A. Jones||?|
|Meirionydd: Llyn Bodlyn||SH 62||1877||T. Salwey||No|
|Meirionydd: "Lake above Llyn Bodlyn"||SH 62||1862||W. Borrer||No|
|Meirionydd: Cwm Mawr||SH 635 319||1959||S.A. Manning||Yes?|