Geastrum minimum

Photo: Jonathan Revett

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Description

General: Pallid greyish-brown bulb surmounting a darker brown star-shaped base, non-hygroscopic, which raises the spore sac above the surrounding substrate; solitary or in small groups usually in coastal regions on sandy soil.
Dimensions: Unopened bulb 0.75-1.0cm dia; expanded 1.5-3.0cm dia.
Fruit Body: Exoperidium whitish becoming more brown; splitting into 6-10 rays, not hygroscopic; endoperidium pallid greyish-brown, sessile, sub-spherical, smooth but often with whitish dusting; peristome bluntly conical, fibrillose and delimited by a weak groove.
Gleba: Brown.
Spores: Dark brown, 5-6µm, spherical, verrucose. Basidia not seen.
Odour: Not distinctive.
Taste: Not distinctive.
Chemical Tests: None.
Occurrence: Autumn.

 

Qualifying criterion: 4.6: very rare species requiring specific conditions and largely restricted to 1 confirmed site
Justification: threatened by erosion at its principal site
Threats: inappropriate sand dune management and erosion
Action Required: Survey and monitoring; protection against habitat loss and degradation; site liaison and management.

 

Statistics:

UK (excluding NI & CI) fungus records

 

Total records: 22

Earliest recording: 1954
Latest recording: 2004
Vice Counties and (frequency): 20(1); 28(20); 71(1)
Pre-1960: 3 records
NBN Gateway grid map Post-1960: 19 records