biology

Samolus valerandi

Samolus valerandi 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 Samolus valerandi rather than just read about it. In short: Samolus valerandi is a species of semi-aquatic flowering plant in the primrose family, Primulaceae. Common names include seaside brookweed, brookweed, thin-leaf brookweed, water cabbage and water rose.

Key takeaways

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

Reference excerpt

Samolus valerandi is a species of semi-aquatic flowering plant in the primrose family, Primulaceae. Common names include seaside brookweed, brookweed, thin-leaf brookweed, water cabbage and water rose.

Description It is a small perennial, growing to around 35 cm (13.8 inches) high. Its inflorescence is a raceme, with small white flowers on long stalks. Its corollas have five lobes. It can produce flowers throughout the growing season, from spring to fall. Its fruits are capsules that are green and globose.

Taxonomy Although some floras recognize the North American populations of S. valerandi as a separate species (S. parviflorus) or subspecies (S. valerandi ssp. parviflorus), a 2012 investigation based on molecular and morphological data indicated that S. vagans and S. parviflorus should not be regarded as separate species but as part of a widespread "S. valerandi species complex".

Distribution Samolus valerandi is widely distributed across western and Mediterranean Europe, north Africa, Asia and Australia, Central and South America including Cuba, and Japan.

Ecological aspects This species is found in a variety of wet habitats, including stream banks, tidal marshes, and seeps. It can be found in both degraded and intact natural communities.

Cultivation The plant can be grown in ponds, bog gardens, and damp areas in the garden. S. valerandi prefers light (sandy), medium (loamy), and heavy (clay) soils, preferably neutral or basic (alkaline) soils. It can tolerate both shade and a bright, sunny position. It requires moist or wet soil and can even grow in water. The plant can tolerate maritime exposure and is self-fertile. S. valerandi is sometimes grown in aquariums, although they seem to last only a limited time when grown fully submersed.

Uses The plant's leaves, when cut and agitated in water, produce a lather, for which reason in Palestine it has been used by the local Arab population, in former times, to launder clothes and was called by them sabūn 'arab (= Arab soap).

References

External links Flora of North Central Texas Flora of Missouri - illustrated Illinois Wild Flowers

Illustrations

Worked examples

Example 1 — a first encounter with Samolus valerandi

Start with the simplest possible case. Write down what Samolus valerandi 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 Samolus valerandi 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 Samolus valerandi 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 Samolus valerandi

In research: Samolus valerandi 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 Samolus valerandi 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: Samolus valerandi is common in secondary-school and first-year university syllabi. It links to neighbouring topics Botanical taxa named by Carl Linnaeus, Flora of Africa, Flora of Australia, so understanding it makes those chapters shorter.
In everyday life: Look for Samolus valerandi 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.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Samolus valerandi in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Samolus valerandi 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 Samolus valerandi out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Samolus valerandi in simple terms?

Why does Samolus valerandi 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 Samolus valerandi?

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 Samolus valerandi.