Myriostoma

Sieberdstern ( Myriostoma coliform )

The Sieberdstern ( Myriostoma coliform ) or screening star is a type of fungus from the family of Erdsternverwandten ( Geastraceae ). He is the only species of its genus and closely related to the Erdsternen.

Features

Macroscopic characteristics

The Sieberdstern has an outer and an inner shell ( exo- or endoperidium ). The outer, tough leathery shell snaps asteroid in 5-11 pointed lobes on, specifies the inner part freely and lifts him off the ground. Spread reaches the outer shell has a diameter of 6-1 cm. The inner shell has a spherical to depressed shape and measures 2.3-4.5 cm in width. It is interspersed with a plurality of about 1 -mm holes. The spore powder in the interior is brown.

Microscopic characteristics

The spores measure ( 3.5 ) 4-5 microns and the surface is up to more than 1 mm high cylindrical warts covered. The light brown hyphae of capillitium are 3-4 microns wide and thick-walled.

Artabgrenzung

The Erdsternen ( Geastrum ) have fruiting bodies very similar structure, but have in the inner envelope only a single opening at the apex, from which the spores can reach the outside.

Ecology

The fungus can be found among others in anthropogenic foliage plants such as black locust, lilac or blackthorn and hawthorn. There he grows on sandy and loess soils with different calcium content.

Dissemination

The Sieberdstern is common in Europe and in the Near East and Central Asia to the Himalayas. It can be found in the north, east and south in Africa. He also grows in North and South America as well as in Hawaii.

In Europe the fungus finds from the Iberian Peninsula, central Italy, Bulgaria and the Ukraine to the south of England, Belgium, the Netherlands and Central Sweden dissemination. In Germany, it is rare in the middle or area, the central marrow and can be found near Magdeburg. More recently, it was also discovered in the Upper Rhine Plain at Käfertal and St. Ilgen. In the 19th century it was also found in Darmstadt.