// Workers AI · dad joke modeWhat did Thaxterogaster causticus say? "I'm fun-gi.
| Thaxterogaster causticus | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Basidiomycota |
| Class: | Agaricomycetes |
| Order: | Agaricales |
| Family: | Cortinariaceae |
| Genus: | Thaxterogaster |
| Species: | T. causticus |
| Binomial name | |
| Thaxterogaster causticus (Fr.) Niskanen & Liimat. | |
| Synonyms | |
|
Cortinarius causticus Fr. | |
| Thaxterogaster causticus | |
|---|---|
| Mycological characteristics | |
 | Gills on hymenium |
 | Cap is conical or umbonate |
 | Hymenium is adnexed |
 | Stipe has a cortina |
 | Spore print is reddish-brown |
 | Ecology is mycorrhizal |
 | Edibility is unknown |
Thaxterogaster causticus, formerly known as Cortinarius causticus[1] and commonly known as the caustic webcap,[2] is a species of mushroom in the family Cortinariaceae.
Description
[edit]The orange,[2] hygrophanous[3] cap of Thaxterogaster causticus is about 1.5-4.5 centimeters in diameter. It starts out conical and usually becomes umbonate in age.[2] The gills start out creamy or white-colored, before becoming brown as the mushroom gets older.[4] They are adnexed and often notched.[2] The stipe is about 3.5-7 centimeters long and 3-6 centimeters wide. It is white and bruises yellow.[4] The spore print is rusty brown.[2] Both the cap and stipe of this mushroom are slimy.[3] There are several similar species, including T. vibratilis, which is found in Europe.[2]
Habitat and ecology
[edit]Thaxterogaster causticus grows under conifers, such as pine,[3] hemlock, and fir.[2] It is found in coniferous forests[3] in the Pacific Northwest.[2]
References
[edit]- ↑ "Index Fungorum - Names Record". www.indexfungorum.org. Retrieved 2025-11-12.
- 1 2 3 4 5 6 7 8 Siegel, Noah; Schwarz, Christian (September 1, 2024). Mushrooms of Cascadia: A Comprehensive Guide to Fungi of the Pacific Northwest. Humboldt County, CA: Backcountry Press. p. 210. ISBN 978-1-941624-19-7.
- 1 2 3 4 Trudell, Steve (October 25, 2022) [January 1, 2009]. Mushrooms of the Pacific Northwest (Revised ed.). Portland, OR: Timber Press. pp. 182–184. ISBN 978-1-64326-086-0.
- 1 2 Adams, Shannon (January 19, 2021). "Cortinarius causticus". North American Cortinarius Collections. Archived from the original on June 6, 2023. Retrieved 2025-11-11.
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