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John Jacob Lavranos

John Jacob Lavranos is a astronomy 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 John Jacob Lavranos rather than just read about it. In short: John Jacob Lavranos (29 March 1926, in Corfu – 1 February 2018, in Portugal) was a Greek/South African insurance broker and botanist, with a special interest in succulents. The standard author abbreviation Lavranos is used to indicate this person as the author when citing a botanical name.

John Jacob Lavranos — main illustration
John Jacob Lavranos — illustration

Key takeaways

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

Reference excerpt

John Jacob Lavranos (29 March 1926, in Corfu – 1 February 2018, in Portugal) was a Greek/South African insurance broker and botanist, with a special interest in succulents. The standard author abbreviation Lavranos is used to indicate this person as the author when citing a botanical name. He scientifically described almost 300 new species of plants, and a number have been named in his honor.

Early life John's mother, Lily, was half Swiss/German, and lived for most of her married life in the family house in Chlomos in Corfu. She and her husband Philip cared for John and his younger brother, Max, saw the occupation of Corfu during WWII, and lived through the bombings by Italians, Germans, British and Americans, only to be plunged immediately into the Greek Civil War of 1946 to 1949. At the end of the War having served in the Greek Navy, John studied economics and law at the University of Athens, earning a B.Sc. (Econ.) degree in 1948. He arrived in South Africa in September 1952 with his first wife, Helen, and started work as an insurance broker. In 1967 he studied for a B.Sc. in Natural Science through the University of South Africa, and the following year enrolled at the University of Witwatersrand for an M.Sc. degree in botany and geography.

Botanical work and later life Over a period of more than 50 years, Lavranos undertook numerous visits to remote regions in southern Arabia, Somalia and Socotra, Kenya and Tanzania, Mozambique, Madagascar, Reunion Island, Mauritius, Canary Islands, Greece, and in his final years, the southwestern United States, Mexico, and Chile. His trips through South Africa included Namaqualand, Mpumalanga, and the Richtersveld. He discovered and described many new species of succulent plants, collaborating with organisations such as the National Museum of Natural History (France), the Institute of Tropical Botany of Florence, Kew Gardens, Jardin Exotique de Monaco, and the Missouri Botanical Garden. His contributions were published mainly in the 'Cactus & Succulent Journal', and he confined himself to Asclepiadaceae, Pelargoniums, Aloes and other succulents. His collection of pressed specimens numbered some 32 000, and he described or co-described approximately 180 taxa. He settled in Loulé, a city near Faro in the Algarve region of southern Portugal in 1995 and donated most of his plants to the Gibraltar Botanic Gardens. Maintaining his passion for plants, he continued an active correspondence with other botanists, often setting aside time for succulent enthusiasts.

If the last century of contributions to our knowledge of succulents plants could be compared to a large greenhouse, then John Lavranos would be one of the supporting poles near the center. Not only has he found so many of Mother Nature's well hidden and most beautiful succulent treasures, but he has shared the resulting knowledge and material with utmost generosity. The combination of skills needed to do what he has done so far is only rarely found in a single human, and more than once have I heard the word genius used where John was discussed. But please note the emphasis in the last sentence, because at 80, John still regularly goes exploring in Africa, Madagascar and the Yemen! No doubt this Pablo Picasso of the succulent plant world will keep on doing his thing for more than another decade. So this issue, dedicated to John, is definitely no premature homage, but rather a long overdue applause of respect and appreciation for all that he has contributed... so far. He is commemorated in the genus Lavrania in the family Apocynaceae, Aloe lavranosii Reynolds, Eriospermum lavranosii P.L.Perry, Caralluma lavranii Rauh & Wertel, Sarcocaulon lavranii Halda, Phagnalon lavranosii Qaiser & Lack Aloe lavranosii is from Yemen and is unusual in being hairy with yellow-green flowers. Crassula susannae was named for Suzanne Lavranos, the second wife of John Lavranos. Caralluma mireillae Lavranos, was named after John's third wife, Mireille, who died in 2014, and whom he had met in Djibouti. She was very supportive of his botanical explorations and often accompanied him. All three of John's marriages were childless. John was known to be pragmatic, forthright, precise, energetic, and with a lively sense of humour. His knowledge of botany and geology was formidable, and this extended to climatology, geography, astronomy, history and music–he was an accomplished pianist earlier in his life. Despite being an agnostic, his Biblical knowledge was extensive. He was a polyglot and comfortable in Ancient Greek and Latin, and fluent in Greek, English, German, French, Italian, Spanish, Portuguese, Arabic and Afrikaans. He succumbed in Loulé, Portugal following a stroke.

References

External links 'The plant gatherings and other vouchers of John J Lavranos Part 1' - Roy Mottram 'The plant gatherings and other vouchers of John J Lavranos Part 2' - Roy Mottram 'John Lavranos, Pelargonium plantsman' - Matija Strlic

Illustrations

John Jacob Lavranos: John Lavranos in his garden in Loulé, Portugal
John Lavranos in his garden in Loulé, Portugal
John Jacob Lavranos: On the road down from the Mait Escarpment north of Erigavo, Somalia, 1969
On the road down from the Mait Escarpment north of Erigavo, Somalia, 1969
John Jacob Lavranos: Lavrania cactiformis
Lavrania cactiformis

Worked examples

Example 1 — a first encounter with John Jacob Lavranos

Start with the simplest possible case. Write down what John Jacob Lavranos claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, 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 John Jacob Lavranos 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 John Jacob Lavranos 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 John Jacob Lavranos

In research
John Jacob Lavranos appears in astronomy 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 John Jacob Lavranos 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
John Jacob Lavranos is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1926 births, 2018 deaths, 20th-century South African botanists, so understanding it makes those chapters shorter.
In everyday life
Look for John Jacob Lavranos 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 John Jacob Lavranos in 20 minutes

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

Frequently asked questions

What is John Jacob Lavranos in simple terms?

John Jacob Lavranos (29 March 1926, in Corfu – 1 February 2018, in Portugal) was a Greek/South African insurance broker and botanist, with a special interest in succulents. The standard author abbreviation Lavranos is used to indicate this person as the author when citing a botanical name.

Why does John Jacob Lavranos matter?

Because it connects several astronomy 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 John Jacob Lavranos?

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 John Jacob Lavranos.

Tags

  • 1926 births
  • 2018 deaths
  • 20th-century South African botanists
  • National and Kapodistrian University of Athens alumni
  • People from Loulé
  • Scientists from Corfu
  • South African people of Greek descent
  • University of the Witwatersrand alumni

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