''Triphragmium ulmariae'' is a species of
rust fungus
Rusts are plant diseases caused by pathogenic fungi of the order Pucciniales (previously known as Uredinales).
An estimated 168 rust genera and approximately 7,000 species, more than half of which belong to the genus ''Puccinia'', are currently a ...
in the family
Sphaerophragmiaceae. It causes meadowsweet rust gall, which develops as a chemically induced swelling, arising from the lower surface of the
meadowsweet (''Filipendula ulmaria'') leaves.
Life cycle
The fungus grows in the
petioles and/or midribs of the perennial plant meadowsweet (''Filipendula ulmaria''), a member of the
rose family
Rosaceae (), the rose family, is a medium-sized family of flowering plants that includes 4,828 known species in 91 genera.
The name is derived from the type genus ''Rosa''. Among the most species-rich genera are '' Alchemilla'' (270), ''Sorbus ...
, causing swelling and distortion.
Sori develop with bright orange spores. The rust's spores reach the new meadowsweet plants via air movements.
The rust has a severe effect on the survival of meadowsweet seedlings.
References
{{Taxonbar, from=Q6803444
Pucciniales
Galls
Fungi described in 1808