Leptosphaeria planiuscula. [Descriptions of Fungi and Bacteria].
Abstract A description is provided for Leptosphaeria planiuscula. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Although the fungus appears on the dry stems of its hosts, it is not known to cause any pathological symptoms. HOSTS: Achillea, Aster, Conyza, Eupatorium, Solidago (Asteraceae) and Lepidium (Brassicaceae). GEOGRAPHICAL DISTRIBUTION: NORTH AMERICA: Canada (Ontario), USA (Georgia, Kansas, Massachussetts, New Jersey, New York, North Dakota). EUROPE: Austria, Denmark, Germany, Latvia, Poland, Sweden, Switzerland. TRANSMISSION: Ascospores are dispersed by wind and rain-splash; the fungus presumably overwinters on dead host tissue and the ascospores are dispersed in the next favourable season.