astronomy

Johannes Paulus Lotsy

Johannes Paulus Lotsy 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 Johannes Paulus Lotsy rather than just read about it. In short: Johannes Paulus Lotsy or Jan Paulus Lotsy (11 April 1867 – 17 November 1931) was a Dutch botanist, specializing in evolution and heredity. He promoted the idea of evolution being driven by hybridization.

Key takeaways

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

Reference excerpt

Johannes Paulus Lotsy or Jan Paulus Lotsy (11 April 1867 – 17 November 1931) was a Dutch botanist, specializing in evolution and heredity. He promoted the idea of evolution being driven by hybridization.

Career Lotsy was born into a wealthy family in Dordrecht and went to study at the Wageningen Agricultural College where his teachers included Martinus Beijerinck and then at the Göttingen University (1886-1890) where he studied lichens for his doctorate. He then went to Johns Hopkins University (1891–1895), as a lecturer and also served as director of the herbarium. From 1896 to 1900 he was sent to Java to work on cinchona research. He returned after suffering from malaria and then taught at Leiden University (1904-1909), as a lecturer in Systematic Botany. He became director of the State Herbarium (Rijksherbarium) 1906–1909, then Secretary of the Hollandsche Maatschappij van Wetenschappen. Lotsy founded the Association internationale des Botanistes and was editor of the Botanisches Centralblatt and the Progressus rei botanicae. He proposed a system of plant classification, based on phylogenetics. Lotsy argued for a major role of hybridization in evolution, including claims for human evolution. Lotsy died at Voorburg following a surgery.

Travels India (1895–1900), the United States (1922), Australia and New Zealand (1925), South Africa (1926–27), and Egypt (1930). He also studied the flora of Italy and Switzerland.

Publications

System Lotsy argued that the monocotyledons were diphyletic, with the Spadiciflorae being derived from the dicotyledons (specifically Piperales) and the remainder from a hypothetical ancestor, the Proranales. Hutchinson, who argued for a monophyletic origin, considered this improbable.

Synopsis Vorträge über botanische Stammesgeschichte

Volume 3: Cormophyta Siphonogamia Part 1 Monocotyledons vol 3(1) p. 514–564, 625–864 Spadiciflorae p. 514–564 Araceae Lemnaceae Cyclanthaceae Palmaceae Pandanaceae Sparganiaceae Typhaceae Alismataceae Butomaceae Hydrocharitaceae Scheuchzeriaceae Zosteraceae Posidoniaceae Aponogetonaceae Potamogetonaceae Najadaceae Altheniaceae Cymodoceaceae Triuridaceae Enantioblastae p. 693-714 Commelinaceae Mayacaceae Xyridaceae Eriocaulaceae Centrolepidaceae Restionaceae Pontederiaceae Liliifloren p. 715–766, 792–834 Liliaceae 714 Melanthiaceae 717 Asphodelaceae 722 Aloinaceae 725 Eriospermaceae 730 Johnsoniaceae 731 Agapanthaceae 732 Alliaceae Gilliesiaceae 734 Tulipaceae 735 Scillaceae 741 Asparagaceae 743 Dracaenaceae 749 Smilaceae 759 Luzuriagaceae 760 Ophiopogonaceae Lomandraceae 761 Dasypogonaceae 763 Calectasiaceae 764 Juncaceae Flagellariaceae 765 Stemonaceae (Roxburghiaceae) 792 Cyanastraceae 793 Iridaceae 794 Crocoideae Iridoideae 796 Ixioideae 799 Haemodoraceae 800 Amaryllidaceae 801, 811 Hypoxidaceae Vellosiaceae 802 Agavaceae 806 Bromeliaceae 814 Dioscoreaceae 823 Taccaceae 826 Burmanniaceen 829 Glumifloren p. 767–791 Cyperaceae Graminaceae Scitamineae p. 835–864 Musaceae Cannaceae Zingiberaceae Marantaceae Orchidaceae Index p. 952

See also Category:Taxa named by Johannes Paulus Lotsy

References

Bibliography

External links

Illustrations

Worked examples

Example 1 — a first encounter with Johannes Paulus Lotsy

Start with the simplest possible case. Write down what Johannes Paulus Lotsy 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 Johannes Paulus Lotsy 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 Johannes Paulus Lotsy 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 Johannes Paulus Lotsy

In research: Johannes Paulus Lotsy 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 Johannes Paulus Lotsy 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: Johannes Paulus Lotsy is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1867 births, 1931 deaths, 19th-century Dutch botanists, so understanding it makes those chapters shorter.
In everyday life: Look for Johannes Paulus Lotsy 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Johannes Paulus Lotsy” →

Affiliate

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

How to study Johannes Paulus Lotsy in 20 minutes

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

Frequently asked questions

What is Johannes Paulus Lotsy in simple terms?

Why does Johannes Paulus Lotsy 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 Johannes Paulus Lotsy?

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 Johannes Paulus Lotsy.