Synonyms: Agaricus flavoalbus, Collybia floridula, Hemimycena flavoalba, Marasmiellus flavoalbus, Mycena flavoalba, Mycena luteoalba, Mycena pumila.
Common name: Ivory Bonnet.
Extract from Wikipedia article: Atheniella flavoalba, which has the recommended name of ivory bonnet in the UK, is a species of agaric in the family Cyphellaceae. The cap is initially conical, before becoming convex and then flat; it may reach up to 1.5 cm (0.6 in) across. The cap is ivory-white to yellowish white, sometimes more yellowish at the center. The tubular stems are up to 8 cm (3.1 in) long and 2.5 mm (0.10 in) thick, and have long, coarse white hairs at their bases. Atheniella flavoalba is found in Europe, the Middle East, and North America, where it grows scattered in pastures or in dense groups under conifers and on humus in oak woods.
Arabic: قلنسوي أبيض مصفر, Dutch: Bleekgele mycena, Egyptian Arabic: قلنسوى ابيض مصفر, Finnish: Kermahiippo, German: Weißgelber Helmling, Hungarian: Sárgásfehér kígyógomba, Persian: کلاهپارچهای عاجی, Polish: Grzybówka żółtobiała, Swedish: Gulvit hätta, Welsh: Bonet ifori.
Atheniella flavoalba is a species of fungus in the family Tricholomataceae. It has a small to medium-sized cap that is yellow to orange-yellow in color, often with a pale yellow to white margin. The gills are crowded and free from the stem. The stem is slender and cylindrical, typically the same color as the cap or slightly paler. In East and Central Texas, Atheniella flavoalba has been found growing in fields, meadows, and along roadsides, often in association with grasses and other herbaceous plants. Fruitings typically occur from spring to fall, with a peak in late spring and early summer. The fungus is considered rare to uncommon in the region.
Small white mushrooms Ivory bonnet (Atheniella flavoalba)(?) in Hensel Park. College Station, Texas, November 16, 2023
355, East Brookside Drive, Bryan, Brazos County, Texas, 77801, United States
Small white mushrooms Ivory bonnet (Atheniella flavoalba) among dry leaves in Hensel Park. College Station, Texas, November 16, 2023353, East Brookside Drive, Bryan, Brazos County, Texas, 77801, United States
Spores of small white mushrooms Ivory bonnet (Atheniella flavoalba) found among dry leaves, collected in Hensel Park. College Station, Texas, November 16, 2023
Spore size 6.7 - 7.5 × 4.6 - 5.05 µm, length to width ratio Q = 1.4 - 1.6.
Ivory bonnet mushrooms (Atheniella flavoalba)(?) or may be Lactocollybia on a fallen mossy osage orange (Maclura), around 1 meter above ground, on Caney Creek Trail (Little Lake Creek Loop Trail) east from Trailhead No. 4 in Sam Houston National Forest north from Montgomery. Texas, November 25, 2023Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Spores of ivory bonnet mushrooms (Atheniella flavoalba)(?) or may be Lactocollybia from a fallen mossy osage orange (Maclura), collected a day before in Sam Houston National Forest north from Montgomery. Texas, November 26, 2023Observations of the fungus Atheniella flavoalba were made in East and Central Texas. In Hensel Park, College Station, small white mushrooms identified as Ivory bonnet (Atheniella flavoalba) were found among dry leaves on November 16, 2023. Spores were collected from these mushrooms. Similar mushrooms were also observed on a fallen mossy osage orange tree in Sam Houston National Forest, north of Montgomery, on November 25, 2023, although their identification as Atheniella flavoalba is uncertain and may be Lactocollybia. Spores from these mushrooms were collected the following day. The fungus was found to grow among dry leaves and on mossy tree trunks, approximately 1 meter above ground. The observations suggest that Atheniella flavoalba may thrive in wooded areas with abundant leaf litter and decaying wood in East and Central Texas.
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