biology

Spiranthes romanzoffiana

Spiranthes romanzoffiana 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 Spiranthes romanzoffiana rather than just read about it. In short: Spiranthes romanzoffiana, commonly known as hooded lady's tresses (alternatively hooded ladies' tresses) or Irish lady's-tresses (Irish: Cùilìn Gaelach), is a species of orchid. Collected by Chamisso during the Romanzov expedition it was described by him in 1828 and named for Count Nikolay Rumyantsev who financed the expedition.

Key takeaways

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

Reference excerpt

Spiranthes romanzoffiana, commonly known as hooded lady's tresses (alternatively hooded ladies' tresses) or Irish lady's-tresses (Irish: Cùilìn Gaelach), is a species of orchid. Collected by Chamisso during the Romanzov expedition it was described by him in 1828 and named for Count Nikolay Rumyantsev who financed the expedition. This orchid is native to North America, Ireland and Great Britain.

Description Hooded lady's tresses is a perennial plant with a fleshy rootstock. It sends up shoots with lanceolate leaves and three rows of flowers arranged in spirally twisted rows. Each scented flower has the sepals and petals united forming a lip of a tube. The labellum (or lower petal) of the flower is white with green veins. The plant flowers in late summer. The flowers are pollinated by insects, and the tiny dust-like seed is distributed by the wind. However the plant can also reproduce vegetatively by means of root tubers which can grow new shoots while the old parts of the plant die. The orchid is associated with a mycorrhizal fungus which can provide it with essential nutrients.

Taxonomy Spiranthes romanzoffiana was scientifically described and named in 1828 by Adelbert von Chamisso. It is classified in the genus Spiranthes within the family Orchidaceae. It has fifteen synonyms including twelve species and three varieties.

Distribution and habitat Hooded ladies' tresses was first described by the German botanist Adelbert von Chamisso. He named it in honour of his patron Nikolay Rumyantsev who had financed the scientific exploration to the Americas in 1815–1818 on which he found the orchid. It is common in North America, including Canada and the United States, but also grows in a few locations in Scotland and Ireland. It is now considered regionally extinct in England, but has recently (2019) been found in Wales.

The first Irish record was made in 1810 in County Cork. Since then it has been found in a number of other locations in Ireland and Northern Ireland, including the Lough Neagh basin and the Mourne Mountains and the hills of Antrim. It grows along lakeshores and in damp pastures. The distribution pattern, occurring on both sides of the Atlantic Ocean, is puzzling.

Ecology Interactions between Irish Lady's Tresses and Its pollinating partners have only been studied in the West Irish populations. The most common pollinators are the Bombus pascuorum, B. hortorum and Apis mellifera. Studies on Mycorrhizal associations for Irish Lady's Tresses have not been conducted. Recent studies have found genetic hybrids in the Ontario, Canada population. Genetic studies have also been conducted in order to ascertain the genetic diversity of the European Population.

References

Correll, D.S., Native Orchids of North America, p. 220. 1978.

Further references Smith, J. E. August 1834. English Botany, Supplement 2786. Copied to New Edition (1840), Volume 7, Page 13, Plate 1212**. "Neottia gemmipara, Proliferous Lady's Tresses" Horsman, F. 2013. The discovery and subsequent history of Spiranthes romanzoffiana Chamisso (Orchidaceae) at Castletown Bearhaven in West Cork (H3) Irish Naturalists' Journal 32 19 - 25.

External links Ulster Museum Habitas Photo gallery

Illustrations

Worked examples

Example 1 — a first encounter with Spiranthes romanzoffiana

Start with the simplest possible case. Write down what Spiranthes romanzoffiana 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 Spiranthes romanzoffiana 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 Spiranthes romanzoffiana 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 Spiranthes romanzoffiana

In research: Spiranthes romanzoffiana 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 Spiranthes romanzoffiana 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: Spiranthes romanzoffiana is common in secondary-school and first-year university syllabi. It links to neighbouring topics Flora of Great Britain, Flora of Ireland, Flora of Subarctic America, so understanding it makes those chapters shorter.
In everyday life: Look for Spiranthes romanzoffiana 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 Spiranthes romanzoffiana in 20 minutes

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

Frequently asked questions

What is Spiranthes romanzoffiana in simple terms?

Why does Spiranthes romanzoffiana 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 Spiranthes romanzoffiana?

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 Spiranthes romanzoffiana.