Abstract
Abstract A description is provided for Gymnosporangium confusum . Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Aecia on hawthorn ( Crataegus ), European quince ( Cydonia vulgaris ), Japanese quince ( Chaenomeles japonica ) and medlar ( Mespilus germanica ); also on Cotoneaster and Sorbus , and occasionally weak infections on pear ( Pyrus communis ). Telia on junipers of both the ' oxycedrus ' and ' sabina ' groups. DISEASE: Medlar rust. Aecia chiefly on the leaves but also on stems, calyces and fruit. Telia on slight fusiform swellings of twigs and branches of juniper. GEOGRAPHICAL DISTRIBUTION: Widespread throughout Europe, extending into Asia (India, Iran, Lebanon, Pakistan, Turkey, USSR) and Africa (Algeria, Morocco, Tunisia). Also established in USA (California) (CMI Map 429, ed. 1, 1967).
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