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Yellow spot

Fungi: Ascomycota: Sordariomycetes: Hypocreales: Nectriaceae: Nectria peziza (Tode) Fr.

Nectria peziza – yellow spot

Synonyms: Byssonectria bryophila, Byssonectria epigaea, Cucurbitaria aurea, Cucurbitaria perforata, Cucurbitaria peziza, Dialonectria aurea, Dialonectria perforata, Dialonectria peziza, Hydropisphaera peziza, Hydropisphaeria peziza, Nectria aurea, Nectria epigaea, Nectria perforata, Neuronectria peziza, Sphaeria aurea, Sphaeria peziza.

Common name: yellow spot.

Extract from Wikipedia article: Nectria peziza or yellow spot is an ascomycete fungus with bright yellow to orange globose fruiting bodies (0.2 – 0.4 mm across) found on rotting polypores, well rotted deadwood, bark, dung, and decaying cloth. Its globular fruiting bodies (peritheca), quite large for the genus, may be isolated or crowded; they have a slightly prominent black dot at the top, the ostiolum, this being the entrance to the inner cavity; the bodies often collapse into a cup-shape when dry and the colour fades to pale yellow or whitish.

Estonian: Kausjas komuseen, Swedish: Skålrödgömming.

AI-generated description

Nectria peziza is a species of fungus in the family Nectriaceae, characterized by its bright orange to reddish-orange perithecia and white to pale yellowish mycelium. In East and Central Texas, it typically grows on deciduous trees, particularly oak and maple, often forming associations with bark beetles. The fungus produces conidia that are elliptical in shape and 3-5 μm in size. It can be found on dead branches, logs, and stumps, and is commonly associated with wounds or cankers on living trees.

Photos of this mushroom from East and Central Texas

Yellow Spot mushrooms (<B>Nectria peziza</B>)(?) on a log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, <A HREF="../date-en/2018-03-10.htm">March 10, 2018</A>
LinkYellow Spot mushrooms (Nectria peziza)(?) on a log on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, March 10, 2018
Location on mapsLittle Lake Creek Loop Trail, Montgomery, TX 77356, USA
Yellow Spot mushrooms (<B>Nectria peziza</B>)(?) on a fallen tree on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, <A HREF="../date-en/2018-03-10.htm">March 10, 2018</A>
LinkYellow Spot mushrooms (Nectria peziza)(?) on a fallen tree on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, March 10, 2018
Location on mapsLittle Lake Creek Loop Trail, Montgomery, TX 77356, USA
Yellow Spot mushrooms (<B>Nectria peziza</B>)(?) on a wood on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, <A HREF="../date-en/2018-03-10.htm">March 10, 2018</A>
LinkYellow Spot mushrooms (Nectria peziza)(?) on a wood on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, March 10, 2018
Location on mapsLittle Lake Creek Loop Trail, Montgomery, TX 77356, USA
Yellow spot fungus (<B>Nectria peziza</B>) on a barkless log covered by Hypoxylon on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, <A HREF="../date-en/2020-09-17.htm">September 17, 2020</A>
LinkYellow spot fungus (Nectria peziza) on a barkless log covered by Hypoxylon on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 17, 2020
Location on mapsLone Star Hiking Trail, Montgomery, TX 77356, USA
Yellow spot fungus (<B>Nectria peziza</B>) on a barkless blackened log on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, <A HREF="../date-en/2020-09-17.htm">September 17, 2020</A>
LinkYellow spot fungus (Nectria peziza) on a barkless blackened log on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 17, 2020
Location on mapsLone Star Hiking Trail, Montgomery, TX 77356, USA
Close-up of yellow spot fungus (<B>Nectria peziza</B>) on a barkless blackened log on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, <A HREF="../date-en/2020-09-17.htm">September 17, 2020</A>
LinkClose-up of yellow spot fungus (Nectria peziza) on a barkless blackened log on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 17, 2020
Location on mapsLone Star Hiking Trail, Montgomery, TX 77356, USA
Details of yellow spot fungus (<B>Nectria peziza</B>) on a barkless blackened log on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, <A HREF="../date-en/2020-09-17.htm">September 17, 2020</A>
LinkDetails of yellow spot fungus (Nectria peziza) on a barkless blackened log on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 17, 2020
Location on mapsLone Star Hiking Trail, Montgomery, TX 77356, USA
Pattarn of yellow spot fungus (<B>Nectria peziza</B>) on a barkless blackened log on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, <A HREF="../date-en/2020-09-17.htm">September 17, 2020</A>
LinkPattarn of yellow spot fungus (Nectria peziza) on a barkless blackened log on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 17, 2020
Location on mapsLone Star Hiking Trail, Montgomery, TX 77356, USA
Tiny orange globes of fungus <B>Nectria peziza</B> on a barkless blackened log on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, <A HREF="../date-en/2020-09-17.htm">September 17, 2020</A>
LinkTiny orange globes of fungus Nectria peziza on a barkless blackened log on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 17, 2020
Location on mapsLone Star Hiking Trail, Montgomery, TX 77356, USA
Yellow spot fungus (<B>Nectria peziza</B>) together wuth algae on a barkless blackened log on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, <A HREF="../date-en/2020-09-17.htm">September 17, 2020</A>
LinkYellow spot fungus (Nectria peziza) together wuth algae on a barkless blackened log on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 17, 2020
Location on mapsLone Star Hiking Trail, Montgomery, TX 77356, USA

AI-generated summary of observations

Observations of Nectria peziza in East and Central Texas show the fungus growing on various substrates, including logs, fallen trees, and wood. On Caney Creek Trail in Sam Houston National Forest, the fungus was found on a log, a fallen tree, and wood in March 2018. In September 2020, it was observed on barkless logs covered by Hypoxylon on the same trail, as well as on blackened logs. Close-up observations revealed tiny orange globes of the fungus, and its pattern on the substrate. The fungus was also found growing together with algae on a barkless blackened log. These observations suggest that Nectria peziza is present in the region and can thrive on various types of decaying wood, often in association with other organisms. The fungus appears to be active during different times of the year.

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