Extract from Wikipedia article: Hortiboletus rubellus, commonly known as the ruby bolete, is a small, dainty, brightly coloured member of the family Boletaceae, with a reddish cap and stipe, and yellow pores. Like many boletes, it stains blue when cut or bruised. It is found in deciduous woodland in autumn. There is some question over its edibility, and it is reportedly of poor quality with a taste of soap. Until 2015, the species was known as Boletus rubellus.
Hortiboletus rubellus is a small to medium-sized bolete fungus with a reddish-brown to pinkish-red cap, typically 2-6 cm in diameter, and a yellow to olive-yellow stem. It has a distribution that includes East and Central Texas, where it often fruits singly or in small groups on the ground in wooded areas, particularly under oak and pine trees. The flesh is yellow and stains blue when injured. Spores are smooth and elliptical, measuring 10-14 μm in length. In Texas, H. rubellus tends to fruit from spring to fall, with peak activity during the warmer months.
Tiny ruby bolete mushrooms Hortiboletus rubellus (Boletus rubellus) on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, October 26, 2013 LSHT Little Lake Creek Loop, Montgomery, TX 77356, USA
Small bolete mushrooms Hortiboletus rubellus(?) with Hypomyces fungus on a trail on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, June 30, 2018 Lone Star Hiking Trail, Montgomery, TX 77356, USA
Ruby bolete mushrooms (Hortiboletus rubellus)(?) on floodplain on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, June 30, 2018 Little Lake Creek Loop Trail, Montgomery, TX 77356, USA
Group of ruby bolete mushrooms (Hortiboletus rubellus)(?) on floodplain on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, June 30, 2018 LSHT Little Lake Creek Loop, Montgomery, TX 77356, USA
Young ruby bolete mushrooms (Hortiboletus rubellus group) on a trail on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, July 13, 2018
Young ruby bolete mushrooms (Hortiboletus rubellus group) on floodplain on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest, near Huntsville. Texas, July 13, 2018
Ruby bolete mushrooms (Hortiboletus rubellus) at Center for Biological Field Studies on Fish Hatchery Road. Huntsville, Texas, September 16, 2018 Forest Service Rd 236A, Huntsville, TX 77320, USA
Underside of ruby bolete mushrooms (Hortiboletus rubellus) at Center for Biological Field Studies on Fish Hatchery Road. Huntsville, Texas, September 16, 2018 Forest Service Rd 236A, Huntsville, TX 77320, USA
Ruby bolete mushrooms (Hortiboletus rubellus)(?) in wet area on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, July 16, 2021 Lone Star Hiking Trail, Montgomery, TX 77356, USA
Ruby bolete mushrooms (Hortiboletus rubellus)(?) on moss in wet area on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, July 16, 2021 Lone Star Hiking Trail, Montgomery, TX 77356, USA
Cross section of ruby bolete mushrooms (Hortiboletus rubellus)(?) on moss in wet area on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, July 16, 2021 Lone Star Hiking Trail, Montgomery, TX 77356, USA
AI-generated summary of observations
Observations of Hortiboletus rubellus in East and Central Texas reveal that the fungus grows in various environments, including floodplains, trails, and wet areas. The mushrooms were found on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, and also at Center for Biological Field Studies on Fish Hatchery Road. They typically appear in summer and early fall, with sightings from June to October. Some specimens were infected with Hypomyces fungus. The mushrooms were often found growing on moss or in areas with moist soil. Young specimens were observed on trails and floodplains, while mature ones were found in similar environments. Cross-sections of the mushrooms were also examined, providing further insight into their structure. Overall, Hortiboletus rubellus appears to be a common species in East and Central Texas.