biology

Salvia splendens

Salvia splendens 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 Salvia splendens rather than just read about it. In short: Salvia splendens, the scarlet sage, is a tender herbaceous perennial plant native to Brazil, growing at 2,000 to 3,000 m (6,600 to 9,800 ft) elevation where it is warm year-round and with high humidity. The wild form, rarely seen in cultivation, reaches 1.3 m (4.3 ft) tall.

Key takeaways

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

Reference excerpt

Salvia splendens, the scarlet sage, is a tender herbaceous perennial plant native to Brazil, growing at 2,000 to 3,000 m (6,600 to 9,800 ft) elevation where it is warm year-round and with high humidity. The wild form, rarely seen in cultivation, reaches 1.3 m (4.3 ft) tall. Smaller cultivars are very popular as bedding plants, seen in shopping malls and public gardens all over the world.

Taxonomy Salvia splendens was first described and named in 1822, when it was given the common name "Lee's scarlet sage." Before dwarf cultivars were developed, an early Dutch selection known as 'Van Houttei' was introduced and remains popular in the horticultural trade.

Description

The native type is rarely used or described, though it grew from 1.3 m (4.3 ft) in height. Its leaves are in even, elliptical arrangements, 7 × 5 cm, with dentate margin and long petioles. It may branch, where upper branches are finely hairy and lower parts hairless. Erect spikes of flowers sprout from the centre of the plant in groups of 2 to 6 from each leaf node; scarlet, tubular or bell-shaped, 35 mm long, with two lobes towards the apex; the upper lobe is 13 mm long. It flowers a good part of summer and autumn.

Cultivation It is widely grown as an ornamental plant, with a large number of cultivars selected by different colours from white to dark purple. It is a subtropical species that does not survive freezing temperatures, but can grow in cold climates as an annual plant. The most common selections are the dwarf sizes that go by names such as 'Sizzler' and 'Salsa', and planted en masse in gardens and malls. 'Van Houttei' reaches 1 to 1.3 m (3.3 to 4.3 ft) in height. The various types typically have red flowers.

Cultivars Named cultivars include:

S. splendens 'Alba', with white flowers 'Atropurpurea', with dark violet to purple flowers 'Atrosanguinea', flowers dark red 'Bicolor', flowers white and red 'Bruantii', small, with red flowers 'Compacta', small, flowers in dense racemes, white or red 'Grandiflora', large, with large red flowers 'Issanchon', small, with white flowers striped pink to red 'Nana', an early-flowering cultivar, with red blossoms 'Scarlet Pygmy', a very dwarf, early flowering seed race with intense scarlet blossoms 'Semperflorens', continuous flowering 'Souchetii', small, with white or red flowers 'St. John's Fire', dwarf plants with dense, abundant, scarlet, early-flowering, long-lasting blossoms 'Violacea', flowers dark violet to purple. The cultivars 'Vanguard' and 'Van-Houttei' have gained the Royal Horticultural Society's Award of Garden Merit.

References

External links UC Berkeley: Observations on Salvia splendens Interview with Daniel Siebert on S. splendens and S. divinorum

Illustrations

Worked examples

Example 1 — a first encounter with Salvia splendens

Start with the simplest possible case. Write down what Salvia splendens 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 Salvia splendens 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 Salvia splendens 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 Salvia splendens

In research: Salvia splendens 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 Salvia splendens 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: Salvia splendens is common in secondary-school and first-year university syllabi. It links to neighbouring topics Flora of Brazil, Garden plants of South America, Medicinal plants, so understanding it makes those chapters shorter.
In everyday life: Look for Salvia splendens 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 Salvia splendens in 20 minutes

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

Frequently asked questions

What is Salvia splendens in simple terms?

Why does Salvia splendens 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 Salvia splendens?

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 Salvia splendens.