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Sessile Earth Star

Geastrum fimbriatum

Description:

Starting out, the Sessile Earth Star is spherical in shape. They are also considered hypogeous in the beginning which basically means the fruit body is underground. As they mature they push up through the ground and then the outer layer (called the exoperidium) opens up. As it opens the flesh splits into 5 - 8 "rays" (that is according to Wikipedia...in my observations they've always split into 7). The inner sac is greyish to a yellowish, whitish color that turns to a dark brown as the spores mature. The spores are released through a cone shaped pore that protrudes from the top of the sac. Raindrops cause the sac to contract which helps to release the spores. These mushrooms have no stalk or stem.

Habitat:

They grow throughout eastern North America, parts of Central and South America, parts of Asia, and in Europe. They grow, usually, in the presence of hard wood trees and one source I have states that they prefer calcareous soil. They grow directly on the ground in groups and in fairy rings.

Notes:

I'm guessing they got the name "Sessile" because of the fact that they have no stem, not really sure. Everything I've ever read says these mushrooms are not edible, including a Wikipedia article. However, the Wikipedia article also noted that it is consumed by the tribal people of central India. The first time I saw one it made me think of a cartoon flower rather than a star. I thought it was one of the coolest mushrooms I had ever seen. It had what appeared to be a fleshy cap like what a regular mushroom has, but then there was the puffball sitting on top. I've seen plenty of mushrooms prior that might have a split in the cap but never occurring in such a uniform pattern all the way around the entire cap. Very cool! For this description, some of it comes from my own personal observation and I also used Wikipedia a little bit but my main reference has been the book Mushrooms by Thomas Læssøe.

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2 Comments

Sean Uhl
Sean Uhl 8 years ago

Thank you, AntónioGinjaGinja! I am enjoying the site so far, I'm very glad to have found it. I was browsing around the web using Bing after seeing a photograph of a Picasso Bug on Pinterest and just happened to stumble across this sight. It is very interesting and I'm looking forward to spending some time here.

Welcome to Project Noah Sean Uhl
Nice first spotting,congrats and thanks for sharing
We hope you like the site as much we do; there are many features you can explore:
We invite you to go to http://www.projectnoah.org/faq where you will find the purpose and “rules” of Project Noah.
There is a blog http://blog.projectnoah.org/ where we post articles from spotters with special insight into different organisms.
Look at the global and local missions to put your spottings into: http://www.projectnoah.org/missions
Enjoy yourself,see you arround :)

Sean Uhl
Spotted by
Sean Uhl

Geneva, Alabama, USA

Spotted on Aug 14, 2014
Submitted on Nov 25, 2015

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