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Amanita Mold

Fungi: Ascomycota: Sordariomycetes: Hypocreales: Hypocreaceae: Hypomyces hyalinus (Schwein.) Tul. & C.Tul.

Hypomyces hyalinus – Amanita Mold

Synonyms: Apiocrea hyalina, Hypocrea hyalina, Hypolyssus hyalinus, Peckiella hyalina, Sphaeria hyalina.

Common name: Amanita Mold.

Extract from Wikipedia article: Hypomyces hyalinus is a species of parasitic fungi that attacks fungi of the genus Amanita. The earliest recording of this parasite was in 1822 in Salem, North Carolina, but microscopic descriptions of H. hyalinus do not appear in the literature until 1886.

AI-generated description

Hypomyces hyalinus is a parasitic fungus that infects mushrooms, particularly species of Amanita, Boletus, and Russula. In East and Central Texas, it has been found to occur on various host species, including Amanita texensis and Boletus rubroflavus. The fungus forms a white to pale yellow, waxy to gelatinous coating over the surface of the infected mushroom, often causing deformation or distortion of the host's cap and stem. It produces perithecia that are partially to fully immersed in the stroma, with ascospores measuring 35-50 μm in length. Hypomyces hyalinus has been collected from various habitats in East and Central Texas, including wooded areas, parks, and nature reserves, typically during the summer and fall months when its host species are most active.

Photos of this mushroom from East and Central Texas

Fungus <B>Hypomyces hyalinus</B> on Amanita(?) mushroom among dry leaves in Lick Creek Park. College Station, Texas, <A HREF="../date-en/2014-07-26.htm">July 26, 2014</A>
LinkFungus Hypomyces hyalinus on Amanita(?) mushroom among dry leaves in Lick Creek Park. College Station, Texas, July 26, 2014
Location on mapsIron Bridge Trail, College Station, TX 77845, USA
Large Tylopilus mushroom together with Amanita covered by fungus <B>Hypomyces hyalinus</B> under small oaks in Lick Creek Park. College Station, Texas, <A HREF="../date-en/2020-06-09.htm">June 9, 2020</A>
LinkLarge Tylopilus mushroom together with Amanita covered by fungus Hypomyces hyalinus under small oaks in Lick Creek Park. College Station, Texas, June 9, 2020
Location on mapsIron Bridge Trail, College Station, TX 77845, USA
Fungus <B>Hypomyces hyalinus</B> on Amanita mushrooms in Lick Creek Park. College Station, Texas, <A HREF="../date-en/2020-06-09.htm">June 9, 2020</A>
LinkFungus Hypomyces hyalinus on Amanita mushrooms in Lick Creek Park. College Station, Texas, June 9, 2020
Location on mapsIron Bridge Trail, College Station, TX 77845, USA
Dissected Amanita(?) mushrooms covered by fungus <B>Hypomyces hyalinus</B> in Lick Creek Park. College Station, Texas, <A HREF="../date-en/2020-06-09.htm">June 9, 2020</A>
LinkDissected Amanita(?) mushrooms covered by fungus Hypomyces hyalinus in Lick Creek Park. College Station, Texas, June 9, 2020
Location on mapsIron Bridge Trail, College Station, TX 77845, USA
Fungus <B>Hypomyces hyalinus</B> on Amanita mushrooms in Lick Creek Park. College Station, Texas, <A HREF="../date-en/2020-06-10.htm">June 10, 2020</A>
LinkFungus Hypomyces hyalinus on Amanita mushrooms in Lick Creek Park. College Station, Texas, June 10, 2020
Location on mapsIron Bridge Trail, College Station, TX 77845, USA
Fungus <B>Hypomyces hyalinus</B> on Amanita mushrooms in cross section in Lick Creek Park. College Station, Texas, <A HREF="../date-en/2020-06-10.htm">June 10, 2020</A>
LinkFungus Hypomyces hyalinus on Amanita mushrooms in cross section in Lick Creek Park. College Station, Texas, June 10, 2020
Location on mapsIron Bridge Trail, College Station, TX 77845, USA
Water drops on a fungus <B>Hypomyces hyalinus</B> in Lick Creek Park. College Station, Texas, <A HREF="../date-en/2020-06-10.htm">June 10, 2020</A>
LinkWater drops on a fungus Hypomyces hyalinus in Lick Creek Park. College Station, Texas, June 10, 2020
Location on mapsIron Bridge Trail, College Station, TX 77845, USA
Texture of a fungus <B>Hypomyces hyalinus</B> in Lick Creek Park. College Station, Texas, <A HREF="../date-en/2020-06-10.htm">June 10, 2020</A>
LinkTexture of a fungus Hypomyces hyalinus in Lick Creek Park. College Station, Texas, June 10, 2020
Location on mapsIron Bridge Trail, College Station, TX 77845, USA
Amanita mold fungus (<B>Hypomyces hyalinus</B>) in Big Creek Scenic Area of Sam Houston National Forest near Shepherd. Texas, <A HREF="../date-en/2021-10-03.htm">October 3, 2021</A>
LinkAmanita mold fungus (Hypomyces hyalinus) in Big Creek Scenic Area of Sam Houston National Forest near Shepherd. Texas, October 3, 2021
Location on mapsLone Star Hiking Trail, Coldspring, TX 77331, USA
Amanita mushrooms with parasitic fungus <B>Hypomyces hyalinus</B> in Big Creek Scenic Area of Sam Houston National Forest near Shepherd. Texas, <A HREF="../date-en/2021-10-03.htm">October 3, 2021</A>
LinkAmanita mushrooms with parasitic fungus Hypomyces hyalinus in Big Creek Scenic Area of Sam Houston National Forest near Shepherd. Texas, October 3, 2021
Location on mapsLone Star Hiking Trail, Coldspring, TX 77331, USA
Dissected Amanita mushrooms with parasitic fungus <B>Hypomyces hyalinus</B> in Big Creek Scenic Area of Sam Houston National Forest near Shepherd. Texas, <A HREF="../date-en/2021-10-03.htm">October 3, 2021</A>
LinkDissected Amanita mushrooms with parasitic fungus Hypomyces hyalinus in Big Creek Scenic Area of Sam Houston National Forest near Shepherd. Texas, October 3, 2021
Location on mapsLone Star Hiking Trail, Coldspring, TX 77331, USA
Cross section of Amanita mushroom with parasitic mold fungus <B>Hypomyces hyalinus</B> in Big Creek Scenic Area of Sam Houston National Forest near Shepherd. Texas, <A HREF="../date-en/2021-10-03.htm">October 3, 2021</A>
LinkCross section of Amanita mushroom with parasitic mold fungus Hypomyces hyalinus in Big Creek Scenic Area of Sam Houston National Forest near Shepherd. Texas, October 3, 2021
Location on mapsLone Star Hiking Trail, San Jacinto County, Texas, United States
Close-up of Amanita mold fungus (<B>Hypomyces hyalinus</B>) in Big Creek Scenic Area of Sam Houston National Forest near Shepherd. Texas, <A HREF="../date-en/2021-10-03.htm">October 3, 2021</A>
LinkClose-up of Amanita mold fungus (Hypomyces hyalinus) in Big Creek Scenic Area of Sam Houston National Forest near Shepherd. Texas, October 3, 2021
Location on mapsLone Star Hiking Trail, San Jacinto County, Texas, United States

AI-generated summary of observations

Observations of Hypomyces hyalinus in East and Central Texas show the fungus infecting Amanita mushrooms in various locations. In Lick Creek Park, College Station, the fungus was found on Amanita mushrooms among dry leaves, under small oaks, and in cross-sections. The fungus was also observed with water drops on its surface and its texture was noted. Similar observations were made in Big Creek Scenic Area of Sam Houston National Forest near Shepherd, where the fungus was found on Amanita mushrooms, including dissected specimens and cross-sections. The fungus appears to be a parasitic mold that infects Amanita mushrooms, and its presence has been documented in both locations over several years, from 2014 to 2021. The observations provide insight into the habits and habitats of Hypomyces hyalinus in East and Central Texas.

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