Diaporthe samaricola
The fungus Diaporthe samaricola produces perithecia embedded in the seed end of the samara (keys) of Ash. Small black ostioles break through the surface to release the spores through a central pore. These are visible as small black dots up to 0.4mm in diameter.
Neosetophoma samarorum produces even smaller black dots on these keys.
host/substrate 
Please provide a photograph. Some indication of size may also be helpful. Note the host plant and substrate in your comments
On the samara (keys) of Ash
Winter and early spring.
See BioImages page https://www.bioimages.org.uk/html/Diaporthe_samaricola.htm
Mark Skevington
Watermead CP South
15 February 2021
on the samara (keys) of Ash
AJ Cann
Leicester Knighton Park
19 February 2021
Peter Smith
Ulverscroft Manor
06 March 2026
Mark Skevington
Huncote Embankment
25 February 2021
Mark Skevington
Watermead CP South
15 February 2021
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UK Map
Species profile
- Species group:
- fungus
- Kingdom:
- Fungi
- Order:
- Diaporthales
- Family:
- Diaporthaceae
- Records on NatureSpot:
- 35
- First record:
- 07/07/2013 (Thompson, Peter)
- Last record:
- 06/03/2026 (Smith, Peter)
Total records by month
% of records within its species group
10km squares with records
The latest images and records displayed below include those awaiting verification checks so we cannot guarantee that every identification is correct. Once accepted, the record displays a green tick.
In the Latest Records section, click on the header to sort A-Z, and again to sort Z-A. Use the header boxes to filter the list.
Latest images
Latest records
Graham Calow
Sapcote, Leicester Road
18 February 2021
on the samara (keys) of Ash
David Nicholls
Launde
15 March 2021
Graham Calow
Stoney Stanton, near Stoney Cove overspill car park
17 February 2021
on samara (key) of Ash
Mark Skevington
Whetstone
16 February 2021
Peter Smith
Cropston, Leicester Road
25 February 2021
Mark Skevington
Whetstone
16 February 2021
Peter Smith
Melton Country Park
18 February 2021
Melinda Bell
Grace Dieu, woods
22 February 2021
Larger Diaporthe on right
David Gould
Aylestone Meadows, Spearwort Fields
20 February 2021
