Puccinia sessilis
Encyclopedia
Puccinia sessilis is a fungal plant pathogen, also known as Arum Rust or Ransons Rust. It commonly infects Arum maculatum
and Allium ursinum causing yellow to orange circular patches on leaves. On the underside it produces raised orange aecia commonly covered in spore
s. It is common in Eurasia
in the Spring.
Other species affected by this rust include Convallaria majalis, Dactylorhiza fuchsii, Dactylorhiza incarnata
, Dactylorhiza majalis, Gymnadenia conopsea, Listera ovata, Paris quadrifolia
and Phalaris arundinacea
Arum maculatum
Arum maculatum is a common woodland plant species of the Araceae family. It is widespread across temperate northern Europe and is known by an abundance of common names including Wild arum, Lords and Ladies, Devils and Angels, Cows and Bulls, Cuckoo-Pint, Adam and Eve, Bobbins, Naked Boys,...
and Allium ursinum causing yellow to orange circular patches on leaves. On the underside it produces raised orange aecia commonly covered in spore
Spore
In biology, a spore is a reproductive structure that is adapted for dispersal and surviving for extended periods of time in unfavorable conditions. Spores form part of the life cycles of many bacteria, plants, algae, fungi and some protozoa. According to scientist Dr...
s. It is common in Eurasia
Eurasia
Eurasia is a continent or supercontinent comprising the traditional continents of Europe and Asia ; covering about 52,990,000 km2 or about 10.6% of the Earth's surface located primarily in the eastern and northern hemispheres...
in the Spring.
Other species affected by this rust include Convallaria majalis, Dactylorhiza fuchsii, Dactylorhiza incarnata
Dactylorhiza incarnata
The Early Marsh Orchid, is a perennial, temperate-climate species of orchid generally found growing in wet meadows, and generally on base-rich soils, up to about 2100m asl...
, Dactylorhiza majalis, Gymnadenia conopsea, Listera ovata, Paris quadrifolia
Paris quadrifolia
Paris quadrifolia is a species of the genus Paris in the family Melanthiaceae, although authorities formerly regarded it as part of the Liliaceae family. It is related to Trillium, with which it can be confused...
and Phalaris arundinacea