biology

Russula aeruginea

Russula aeruginea is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Russula aeruginea rather than just read about it. In short: "Green brittlegill" redirects here. The related green-cracking brittlegill Russula virescens is also called thus.

Key takeaways

Russula aeruginea belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Russula aeruginea to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Russula aeruginea from memory before moving on to harder problems.

Reference excerpt

"Green brittlegill" redirects here. The related green-cracking brittlegill Russula virescens is also called thus.

Russula aeruginea, also known as the green brittlegill, grass-green russula, the tacky green russula, or the green russula, is an edible Russula mushroom. Widely distributed in northern temperate regions, it is usually found under birch, mostly in pine forests.

Taxonomy The species was first described in Elias Magnus Fries's 1863 work Monographia Hymenomycetum Sueciae. The specific epithet aeruginea is derived from the Latin aeruginus, referring to the tarnished color of copper. It is commonly known variously as the "tacky green Russula", the "grass-green Russula", or the "green Russula".

Description The cap is flat when young, soon funnel shaped and weakly striped; somewhat sticky and shiny, pale green to light grey-green, more rarely olive green. It is often 4 to 10 cm (1.6 to 3.9 in) in diameter. The closely spaced gills are pale cream when young, later becoming light yellow when the spores mature. The stipe is white, occasionally with rust-coloured spots at the base, often rather short with longitudinal furrows. It measures 5–8 cm (2.0–3.1 in) long by 1–2 cm (0.4–0.8 in) thick. The flesh is white, brittle and without scent, with a mild taste. The spore print is cream-yellow. The spores are spherical to oval with ridges and warts on the surface, and measure 6–8 by 6–7 μm.

Similar species The very poisonous death cap can have a similar appearance, especially from above. Green specimens of R. xerampelina (the crab brittlegill) are similar, but always smell of cooked shellfish. R. grisea and R. parazurea are also similar.

Distribution and ecology R.aeruginea is widely distributed in northern temperate zones. Fruiting occurs from July to November in Europe, and in late summer to autumn in North America. It is also found in East Africa. The fruit bodies grow on the ground in woods, in troops in leaf litter or in grass. Thius species is ectomycorrhizal with birch, but also with found under conifers, particularly pine and spruce. This mushroom has been recorded as an occasional food of adults of the pleasing fungus beetle Tritoma angulata

Uses The mushrooms are edible.

Illustrations

Worked examples

Example 1 — a first encounter with Russula aeruginea

Start with the simplest possible case. Write down what Russula aeruginea claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Russula aeruginea before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Russula aeruginea ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Russula aeruginea

In research: Russula aeruginea appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Russula aeruginea in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Russula aeruginea is common in secondary-school and first-year university syllabi. It links to neighbouring topics Edible fungi, Fungi described in 1863, Fungi of Europe, so understanding it makes those chapters shorter.
In everyday life: Look for Russula aeruginea outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Russula aeruginea in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Russula aeruginea means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Russula aeruginea out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Russula aeruginea in simple terms?

"Green brittlegill" redirects here. The related green-cracking brittlegill Russula virescens is also called thus.

Why does Russula aeruginea matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Russula aeruginea?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Russula aeruginea.