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Varieties. 1  Clematis (cirrhosa) 'Freckles' - Attractive largish fragrant cream bell shaped flowers (to 2 inches or 5cm) flecked with pink to reddish/brown spots or 'freckles' appear from late summer through to winter. 2  Foliage is a handsome dark green fern like foliage. 3  Clematis cirrhosa var.
Clematis, especially varieties and cultivars that produce large blooms. About. Clematis wilt is a very common although little understood problem. The disease is caused by a fungus known as Phoma clematidina. The fungus causes lesions on the plantâs stems which in contact with water, release their spores that spread the infection. The disease is thought to also be affected by water-logging, wind and failed grafts. Sometimes clematis wilt is caused or aggravated by root damage and damage caused by slugs and insects, possibly transporting the spores. The disease is rarely fatal to the plant and new shoots normally reappear in the next season.