17 September 2013

Blackening Brittlegill and other fungi

Young Russula nigricans

Blackening Brittlegill (Russula nigricans) is a very common toadstool of deciduous woodlands and hedgerows. It seems to be particularly abundant this year. Fresh specimens are usually a dirty white colour but specimens turn black with age (photo below shows the collection above after 24 hours).

Blackening reaction 24 hours after collection

These fruiting bodies were abundant in the hedges along Plas Road, near the village of Cilybebyll in the company of equally abundant Purple Stocking Webcap (Cortinarius stillatitius).
There were also abundant fruiting bodies of Inocybe aghardii on Morfa Tip last week where Mark had found a nice population (60+ spikes) of Autumn Lady's-tresses (Spiranthes spiralis).

Inocybe aghardii, Morfa Tip

Inocybe species (Fibrecaps) are difficult to identify in the field and need to be confirmed by microscopic features. They are brown-spored and this results in the characteristic brown colouration of the mature gills. Inocybe aghardii is fairly common in coastal areas, often growing in sandy areas near Creeping Willow (Salix repens). It can be confused with another Fibrecap called Inocybe dulcamara, which also occurs on sand dunes near willows, e.g. Crymlyn Burrows.

Inocybe dulcamara, Crymlyn Burrows

The young fruiting bodies of Inocybe dulcamara have a prominant cortina (a web-like veil across their gills) which breaks away as the cap expands to leave a fibrous ring on the stipe (see photograph above).
All Fibrecaps are poisonous and should not be tasted. Some are very poisonous.

No comments: