Russula cellulata

Overview

Russula cellulata is a brittlegill, a mushroom of the genus Russula, which has brittle flesh and gills. The catalogue calls it the African brittlegill and records it in the institutional edible-fungi inventory of EFTA.

The name is a research label. The supplied catalogue states that the identity and current safety of this record require separate validation.

Ecology

The EFTA entry describes the fungus as ectomycorrhizal, associated with Afzelia africana, Marquesia and Brachystegia species. It grows in dry dense forest, gallery forest and miombo. The catalogue records supply as wild.

Taste, smell and use

The EFTA entry describes the taste as neutral to mild and pleasant, and the smell as weak and quickly unpleasant. It gives no preparation or cooking guidance, so this page gives none.

The entry does not state the species' edibility directly. Its note on the similar Russula liberiensis calls that species edible, which implies a comparable use for this one, but that is an inference from the note and not a statement about this species.

Identification

The EFTA entry notes that Russula cellulata can be confused with Russula liberiensis. Microscopically, R. liberiensis has more globose spores (Q = 1.02 to 1.13) with fully isolated warts. A separation of this kind needs a microscope and a specialist, and a field description alone does not settle it.

How to recognise a brittlegill

A mushroom is a brittlegill, a Russula, only when several features line up. The cap is usually brightly coloured. The gills are brittle: they snap when you try to bend them, and the flesh breaks cleanly like chalk instead of tearing into fibres. The stem carries no ring and no cup or sack at its base, and there are no veil remnants on the cap. The gills are attached to the stem, and a spore print is white, cream or dark yellow.

Two checks separate Russula from its look-alikes. Break a gill or cut the flesh: a brittlegill gives no milky juice, while a milkcap (Lactarius or Lactifluus) weeps latex. Then look at the stem. A ring on the stem, a cup or a sack or bulb with torn remnants at its base, or flesh that tears in fibres points away from Russula and towards Amanita, a genus that includes the deadly death cap and many other poisonous species. A mushroom with a ring or a cup at the base is not a Russula, whatever colour its cap is.

Recognising the genus is much easier than naming the species. Cap colour varies widely inside one species, so experts rely on the colour of the spore print, the taste, colour changes in the flesh, how far the cap skin peels, chemical tests and the microscope. A collector who is sure of the genus but not of the species should treat the species as unidentified.

The taste test, and what it cannot tell you

Foragers have long sorted brittlegills by taste. Break off a small piece of cap flesh or gill, chew it for several seconds and spit it out without swallowing; the burn of an acrid species can take half a minute to build. Brittlegills that taste mild are the traditional edibles. Those that taste hot, peppery or acrid, and many bitter ones, are left alone because they irritate the stomach and bowel and can cause vomiting and diarrhoea.

The method works only inside the genus. Use it once the mushroom is positively a Russula, never to decide whether an unknown mushroom is safe: the deadliest mushrooms do not taste unpleasant, and a mild taste says nothing about an Amanita, a Cortinarius or any other family. Within Russula it is a screen for rejecting species, not proof of safety. Some mild species are poor eating, rare species are poorly documented, and a few brittlegills have been linked with poisoning. Cook what you eat, start with a small portion, and identify to species where you can. This record is not a field guide.

Safety

The EFTA entry gives no explicit safety warning for this species. That absence is not a safety finding. A food-use record does not establish identification, edibility or a safe preparation, and a wild brittlegill should be identified by an experienced expert before anyone eats it. The catalogue notes that its preparation, identity and current safety require separate validation.

Sources and gaps

The next research question is whether a species-level microscopic identification supports the EFTA record for Russula cellulata, and whether any source gives a preparation or a food-safety statement for it.