what are its characteristics that can be observed through a microscope?
Its basidia has a basal clamp connection and the spores in mass are dark brown when mature.
Geastrum quadrifidum
The basidia of "G. quadrifidum" have a basal clamp connection, or they narrow into a hyphal part that ends at a clamp.
what is geastrum quadrifidum? An inedible species of mushroom what is the origin of the name? Latin what does this species look like? The immature, unopened fruit body is roughly spherical to somewhat flattened or irregular in shape.
wiki:23947177
Geastrum quadrifidum [SEP] Microscopic characteristics
Thick-walled hyphae are also present, measuring 2–11 (sometimes up to 19) μm wide. The outer part (the mycelial cup) consists of thick-walled, branched and densely interwoven hyphae (often with a narrow lumen) that measure 1.5–4 μm wide.