Joerstadia
Encyclopedia
Joerstadia is a genus
of rust fungi
in the family Phragmidiaceae
. The genus contains four species
known from Africa, including Madagascar
, which grow on Alchemilla
plants.
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
of rust fungi
Rust (fungus)
Rusts are plant diseases caused by pathogenic fungi of the order Pucciniales. About 7800 species are known. Rusts can affect a variety of plants; leaves, stems, fruits and seeds. Rust is most commonly seen as coloured powder, composed off tiny aeciospores which land on vegetation producing...
in the family Phragmidiaceae
Phragmidiaceae
The Phragmidiaceae are a family of rust fungi in the order Pucciniales. The family contains 14 genera and 164 species.-Genera:*Arthuriomyces*Frommeella*Gerwasia*Gymnoconia*Hamaspora*Joerstadia*Kuehneola*Mainsia...
. The genus contains four species
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...
known from Africa, including Madagascar
Madagascar
The Republic of Madagascar is an island country located in the Indian Ocean off the southeastern coast of Africa...
, which grow on Alchemilla
Alchemilla
Alchemilla is a genus of herbaceous perennial plants in the Rosaceae, and a popular garden herb with the common name Lady's mantle. There are about 300 species, the majority native to cool temperate and subarctic regions of Europe and Asia, with a few species native to the mountains of Africa,...
plants.