Urocystis Rabenh. ex Fuckel

Type

Urocystis occulta (Wallr.) Rabenh. ex Fuckel on Secale cereale L.

Synonyms

Ginanniella Cif.
Polycystis Lév.
Polysaccopsis Henn.
Tuburcinia Fr.
Urocystis Rabenh.

Description

Sori mostly in leaves and stems, sometimes in flowers or seeds, less often in roots, as brown or blackish brown streaks, spots, swellings or galls containing a mass of spore balls, usually powdery. Infection usually systemic.

Spore balls persistent, composed of one to several dark fertile spores surrounded by paler and smaller sterile cells.

Spore germination of Tilletia-type.

Host-parasite interaction by haustoria.

Septal pore simple with membrane caps and 2 non-membraneous plates closing the pore.

Comments

Urocystis includes about 150 known species infecting 22 host plant families, six monocotyledonous and 16 dicotyledonous (Vánky, 2002). In Australia, 13 species have been recorded on seven host families.

Species in Australia
 
Urocystis agropyri
Urocystis bolivarii
Urocystis chorizandrae
Urocystis destruens
Urocystis eranthidis
Urocystis glabella
Urocystis junci
Urocystis magica
Urocystis occulta
Urocystis poae
Urocystis ranunculi
Urocystis stipae
Urocystis tritici

Key based on host taxonomy
 
On Hypoxidaceae (Hypoxis)Urocystis glabella
On Cyperaceae (Chorizandra)Urocystis chrizandrae
On Poaceae1
1.  On AustrostipaUrocystis stipae
On ElymusUrocystis agropyri
On LoliumUrocystis bolivarii
On PoaUrocystis poae
On SecaleUrocystis occulta
On TriticumUrocystis tritici
On Juncaceae (Juncus)Urocystis junci
On Liliaceae1
1.  On AlliumUrocystis magica
On WurmbeaUrocystis destruens
On Ranunculaceae1
1.  On EranthisUrocystis eranthidis
On RanunculusUrocystis ranunculi