Although it’s much closer to Ostara than Samhain, Mark Avery has clearly been spending a fair amount of time recently reading about ghosts. Not ghosts of the supernatural sort, mind you; rather the Ghost Orchid, Epipogium aphyllum Sw., as featured in the title of Peter Marren’s new book “Chasing the Ghost; My Search for all the Wild Flowers of Britain” from Square Peg / Penguin UK.