||P.1413 right column bottom paragraph: "Members of more than 80% of extant vascular plant families form AM (arbuscular mycorrhizal fungi) and 'primitive' plants such as hepatics and hornworts also produce AM-like symbioses (e.g. Schüßler 2000). Moreover, one apparently unique symbiosis represents a consortium of Cyanobacteria (blue-green algae) and an obligately symbiotic, Glomerales-related fungus, Geosiphon pyriformis. In this case the situation is reversed compared with AM fungi, as the fungus is the macrosymbiont (exhabitant) and the photosynthetic partner the microsymbiont or inhabitant (Schüßler et al. 1996, Schüßler & Kluge 2001)."