Portal:Fungi/Selected species/1

Agaricus texensis, commonly known as the gasteroid agaricus, is a species of fungus in the family Agaricaceae. Found only in southwestern and western North America, it is adapted for growth in dry, semiarid habitats. The fruit bodies are secotioid, meaning the spores are not forcibly discharged, and the cap does not fully expand. Unlike other Agaricus species, A. texensis does not develop true gills, but rather a convoluted and networked system of spore-producing tissue called a gleba. When the partial veil breaks or pulls away from the stem or the cap splits radially, the blackish-brown gleba is exposed to the elements. Formerly named Longula texensis (among several other synonyms), it was shown by molecular analysis in 2004 to be most evolutionarily closely related to Agaricus.