<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <HTML> <HEAD> <TITLE>Fuscidea lygaea (images of British lichens)</TITLE> <META NAME="description" CONTENT="Photograph of Fuscidea lygaea (lichen)"> <META NAME="keywords" CONTENT="image, images, photograph, lichen, Fuscidea"> <META NAME="Author" CONTENT="Alan J. Silverside"> </HEAD> <BODY bgcolor="#000000" background="Icback_dr.jpg" TEXT="#000000" LINK="#3672a4" VLINK="#3672a4"> &nbsp; <center><table border=0 bgcolor="#ffffff" width=1000> <tr><td> <a href="Fuscidea_lightfootii.html" target="_top"><img src="previous.gif" border=0 alt="Previous page" align=left></a> <a href="Fuscidea_recensa.html" target="_top"><img src="next.gif" border=0 alt="Next page" align=right></a> <blockquote> <h5 align=center><font color="#b22222" face="arial">&nbsp;<br>lastdragon.org</font></h5> <h2 align=center><font color="#b22222">Images of British Lichens</font></h2> <hr width="50%"> <p><br></p> <center> <p><font size=5><b>Fuscidea lygaea</b></font><font size=4> (Ach.) V.Wirth &amp; Vzda</font></p> <p><br></p> <table width=840 border=0> <tr><td><div align=justify><font face="arial" size=2>Thallus a thin, usually cracked, pale- to dark-grey, brown-grey or grey-brown, usually mottled crust, often with a purplish tinge more apparent at distance, usually bordered by a darker, effuse prothallus; apothecia minute, less than 0.5mm, black, flat to convex, margin at best indistinct, ascopores &plusmn; globose. On exposed, hard rocks and boulders in the north and west, commonly in mosaics with <i>F.&nbsp;cyathoides</i>. Usually distinguishable from <i><a href="Fuscidea_cyathoides.html">F.&nbsp;cyathoides</a></i> by its tiny, borderless apothecia, but both species are variable and microscopc confirmation of the globose or near-globose ascopores is sometimes helpful.</p> <p>Refs: Smith <i>et al.</i> (2009), 410; Purvis <i>et al.</i> (1992), 255; Dobson (2005), 178 (photo); Dobson (2011), 184 (photo).</p> <p><i>Fuscidea</i> is part of the very large '<i>Lecidea</i> group' of lichens &ndash; crustose species with dark or black apothecia that lack distinct 'thalline' margins, though they will usually have differentiated 'proper' margins the same colour as the disk. Microscopic examination of mature apothecia (and sadly they are often <i>not</i> mature) is usually necessary even to be sure of the genus, and field identification of all but a few distinctive species is risky. Dobson (2011), pp. 236-7, gives an invaluable analysis of the component genera.</p> <p>FGBI: <a href="http://fungi.myspecies.info/all-fungi/fuscidea-lygaea" target="_blank">http://fungi.myspecies.info/all-fungi/fuscidea-lygaea</a></font></div></td></tr> </table> &nbsp; <table> <tr><td align=center><img src="Fuscidea_lygaea_DSCN4779.jpg" border=1 vspace=5 alt="Fuscidea lygaea"></td></tr> <tr><td align=center><font face="arial" size=2>On coastal pebble, Kingston on Spey, Morayshire, August 2010 (BLS meeting)</font></td></tr> </table> <p><br></p> <table border=0> <tr><td><a href="Fuscidea_lightfootii.html" target="_top"><img src="baru6.gif" border=0 alt="Previous page"></a></td> <td width="50">&nbsp;</td> <td><a href="Fuscidea_recensa.html" target="_top"><img src="baru8.gif" border=0 alt="Next page"></a></td></tr> </table> </center> <p><br></p> <p><hr></p> <center><font face="Arial" size=2> <p><b><a href="index.html" target="_top">Lichens HOME PAGE</a> | <a href="indexP.html" target="_top">Index of Species</a> | <a href="http://www.lastdragon.org/conditions.html" target="_top">Conditions of Use and e-mail contact</a> | <a href="references.html" target="_top">References</a> | <a href="http://www.lastdragon.org/home.html" target="_top">Site Home Page</a></b></p> </font></center> <p><br></p> <font face="Arial" size=2> <p>&copy; A.J. Silverside<br> Uploaded March 2011, last updated January 2016</p> </font> </blockquote> </td></tr> </table></center> </BODY> </HTML>