Geastrum sp. natural environment
|Copyright: Ungureanu Liviu (Apashu)
|Date Taken: 2010-11-14|
|Exposure: f/7.1, 1/30 seconds|
|More Photo Info: [view]|
|Photo Version: Original Version|
|Date Submitted: 2010-12-17 5:40|
|[Note Guidelines] Photographer's Note|
|Geastrum (orthographical variant Geaster) is a genus of mushroom in the family Geastraceae. Many species are known commonly as earthstars.|
The name comes from geo meaning earth and aster meaning star.
The name refers to the behavior of the outer peridium. At maturity, the outer layer of the fruiting body splits into segments which turn outward creating a star-like pattern on the ground. The inner peridium is a spore sack. In some species, the outer peridium splits from a middle layer, causing the spore sack to arch off the ground. If the outer peridium opens when wet and closes when dry. It is described as hygroscopic.
In some species, the inner peridium is borne on a stalk or pedicel. The columella is a column-like clump of sterile tissue to be found inside the inner peridium. The network of fertile tissue inside the inner perdium, the capillitium, arises from the columella. The mouth in most species of "earth-stars" is quite prominent, often arising as a small cone at the apex of the inner peridium.
zetu, samiran88 has marked this note useful
Only registered TrekNature members may rate photo notes.
|You must be logged in to start a discussion.|
- [2010-12-17 6:00]
Asta parca imi place si mai mult.
Very interesting creature and nice shot.
You capture a commonly unknown mushroom with great detail. TFS
very good picture with great sharpness and good details
beautiful colours and nice pose