Claviceps purpurea, cause of ergotism-- likely contributor to the Salem Witch Trials, Tom Volk's Fungus of the Month for October1999
Article by Tom Vork on this species which is a plant parasite commonly found on grains of rye and......
http://botit.botany.wisc.edu/toms_fungi/oct99.html
Xylariaceae: Home
Keys and images of 12 genera of Xylariaceae....
http://mycology.sinica.edu.tw/Xylariaceae/