🍄⭐The March mushroom of the month is the False Earthstar, Astraeus sp.
🙌 to Ellen for correctly identifying this mushroom and the newest member of the society.
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the barometer earthstars
The species in the Astraeus genus are not true earth stars though they do look similar to puffballs when they are young. False earthstars have a unique adaptation that sets them apart - arms, or rays, open and close in response to moisture. During hot, dry periods, the arms close up to protect the spore sac. When it rains, or there is moisture in the air, the arms open up to receive it. This special function is called hygroscopy and is used by many plant and animal species to retain hydration.
Taxonomy & Ecology
False earth stars resemble true earth stars (Geastrum) with a spore sac surrounded by an outer shell that splits into star-like rays at maturity. These fungi are ectomycorrhizal, partnering with tree and shrub roots for nutrients. Their rays have an irregularly cracked surface, while the smooth, pale brown spore sac develops a slit at the top. Initially white, the gleba turns brown and powdery as spores mature. The spores are reddish-brown, roughly spherical, and covered in minute warts, measuring 7.5–11 µm in diameter.
are they useful?
False earth starts are not commonly foraged in North America though not poisonous, they are not considered edible. However, in southwest India, Astraeus hygrometricus is foraged a traditional delicacy during the monsoon season and biochemical studies have revealed that it is most nutritious when it is cooked. False earth stars can be dried and used in art projects or as seasonal decor!
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