Colpoma juniperi. [Descriptions of Fungi and Bacteria].
Abstract A description is provided for Colpoma juniperi. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Juniperus communis (bark, twig), J. communis subsp. nana (twig), J. nana [=J. communis subsp. nana] (twig), J. sibirica (twig), Juniperus sp. (twig). DISEASE: Colpoma juniperi is found on living and dead branches, typically on old bushes or trees in undisturbed natural forest, but also on long-established dwarf bushes at higher altitudes. Unlike branches on other plants inhabited by other species of Colpoma, those of Juniperus bearing C. juniperi are not noticeably brittle. It is usually found only on the lower part of the tree or bush, mostly near the centre of the tree. GEOGRAPHICAL DISTRIBUTION: Austria, Estonia, Finland, former Czechoslovakia [fide Holm & Holm, 1977], Greenland [fide Holm & Holm, 1977], Iceland [fide Holm & Holm, 1977], Italy, Norway, Poland, Sweden, Switzerland, UK (Scotland), Ukraine. The fungus may also exist in the USA (New York) [fide Holm & Holm, 1977], but this could be Coccomyces petersii incorrectly identified. Colpoma juniperi is common in northern Scandinavia, becoming rarer further south, and appears to be absent from Denmark [fide Holm & Holm, 1977]. Altitude records exist up to 1850m (Ukraine), 870m (Norway) and 760m (Scotland). TRANSMISSION: By air-borne ascospores in humid conditions; ascomata containing ascospores have been observed from May to July; ascomata which no longer contain ascospores have been observed in September.