• Proposed
  • 2Under Assessment
  • 3Preliminary Assessed
  • 4Assessed
  • 5Published

Cyathus helenae H.J. Brodie

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Scientific name
Cyathus helenae
H.J. Brodie
Common names
IUCN Specialist Group
Mushroom, Bracket and Puffball
Assessment status
Proposed by
Larissa Trierveiler-Pereira
Comments etc.
Larissa Trierveiler-Pereira

Assessment Notes

Taxonomic notes

Basidiomata infundibuliform to slightly campanulate, 8-12 mm high, 7-9 mm wide at the mouth. Expanded in the upper third and abruptly constricted in the base. Exoperidium woolly to slightly hirsute, with fine darker hair, Brown (Y70: M80/C80), smooth. Inner surface distinctly plicate, 0,7 mm of wide, silvery (B40: M00/C00), shiny. Epiphragm composed by two layers being the most external hirsute and concolor to exoperidium and the most internal brittle and whitish, membranous. Basal emplacement conspicuous, concolor to exoperidium. Mouth slightly fimbriate with hairs up to 0,3 mm of length. Peridioles circular to elliptical, 2,5 x 2-2,5 mm, Silvery Gray (B40: M00/C00). Tunic present, thick and greyish. Cortex single layered. Basidiospores smooth, hyaline, 10-16 x 9-14 µm (10 x 15 µm), elliptical, thick walled, up to 2 µm. Apiculus absent.

Why suggested for a Global Red List Assessment?

There are a few records of the species worldwide. We, thus, suggest this species to be categorized as Near Threatened (NT).

Geographic range

According to GBIF, there are records from America and Southeast Asia (Malasya) (5 countries)

Population and Trends

There are 15 records of this species in GBIF, most of them from Brazil (5).

Population Trend: Uncertain

Habitat and Ecology

Found on rotting wood. Not common in Brazil. In Brazil, the species is found in Atlantic Forest and Caatinga.

Subtropical/Tropical Dry ForestSubtropical/Tropical Moist Lowland ForestSubtropical/Tropical Dry ShrublandSubtropical/Tropical Moist Shrubland


In Brazil, there are few records from only a few localities. It is found in the Atlantic Forest, a hotspot, and Caatinga (threatened with desertification).

Housing & urban areasAgro-industry farmingAgro-industry plantationsAgro-industry grazing, ranching or farmingMining & quarryingRoads & railroads

Conservation Actions

Reports in Brazil are from protected area.

Site/area protection

Research needed

We need more collections of the species.

Population size, distribution & trends

Use and Trade




Country occurrence

Regional Population and Trends

Country Trend Redlisted