Trichoglossum hirsutum (NL: Ruige aardtong / EN: Black Earth Tongue, Hairy Earthtongue / DE: Gemeine Haarzunge / FR: Trichoglosse hirsute) is one of several black earth tongues that occur locally. All require a microscope for positive identification. Velvety hairs on both the stipe and fertile "head" are the primary distinguishing feature of Trichoglossum species. This character separates the genus from Geoglossum, whose species have a relatively smooth surface, but are otherwise similar in appearance. ("Hirsutum" means "hairy" in reference to the velvety hairs present on the fruitbody.) Fruitbodies consists of a club to lance-shaped, compressed head-like portion (often grooved) supported by a stalk up to 7.5 cm tall. Both stalk and head have minute spines (setae) that are visible with a hand lens (In this image clearly visible !). The species is on the Red list stated as "rare" and "volnurable".
Image: Ranst (B) - 30/09/2011
© Johan Dierckx
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