Melchior system

Key takeaways

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

Reference excerpt

The Melchior system, "a reference in all taxonomic courses", is a classification system detailing the taxonomic system of the Angiospermae according to A. Engler's Syllabus der Pflanzenfamilien (1964), also known as "modified or updated" Engler system. The collaborators in orders (and some families) were the following:

Hans Melchior in Casuarinales, Juglandales, Balanopales, Leitneriales, Salicales, Fagales, Urticales, Didiereaceae, Piperales, Aristolochiales, Guttiferales, Sarraceniales, Papaverales, Hydrostachyales, Podostemonales, Julianiales, Violales, Cucurbitales, Myrtiflorae, Umbelliflorae, Primulales, Tubiflorae, Plantaginales, Liliiflorae p. p., Spathiflorae and Microspermae. G. Buchheim in Proteales, Cactales, Magnoliales and Ranunculales. W. Schultze-Motel in Santalales, Balanophorales, Medusandrales, Rhamnales, Malvales, Diapensiales, Ericales and Cyperales. Th. Eckardt in Polygonales, Centrospermae, Batales, Plumbaginales, Helobiae, Triuridales and Pandanales. G. K. Schultze-Menz in Rosales. H. Scholz in Geraniales, Rutales, Sapindales and Celastrales. G. Wagenitz in Thymelaeales, Ebenales, Oleales, Gentianales, Dipsacales and Campanulales. U. Hamann in Cyanastraceae, Pontederiaceae, Philydraceae, Juncales, Bromeliales and Commelinales. E. Potztal in Graminales, Principes, Synanthae and Scitamineae.

subdivisio Angiospermae

classis Monocotyledoneae

ordo Helobiae subordo Alismatineae Alismataceae Butomaceae subordo Hydrocharitineae Hydrocharitaceae subordo Scheuchzeriineae Scheuchzeriaceae subordo Potamogetonineae Aponogetonaceae Juncaginaceae Potamogetonaceae Najadaceae Zannichelliaceae

ordo Triuridales Triuridaceae

ordo Liliiflorae subordo Liliineae Liliaceae Xanthorrhoeaceae Stemonaceae Agavaceae Haemodoraceae Cyanastraceae Amaryllidaceae Hypoxidaceae Velloziaceae Taccaceae Dioscoreaceae subordo Pontederiineae Pontederiaceae subordo Iridineae Iridaceae Geosiridaceae subordo Burmanniineae Burmanniaceae Corsiaceae subordo Philydrineae Philydraceae

ordo Juncales Juncaceae Thurniaceae

ordo Bromeliales Bromeliaceae

ordo Commelinales subordo Commelinineae Commelinaceae Xyridaceae Mayacaceae Rapateaceae subordo Eriocaulineae Eriocaulaceae subordo Restionineae Restionaceae Centrolepidaceae subordo Flagellariineae Flagellariaceae

ordo Graminales Gramineae or Poaceae

ordo Principes Palmae or Arecaceae

ordo Synanthae Cyclanthaceae

ordo Spathiflorae Araceae Lemnaceae

ordo Pandanales Pandanaceae Sparganiaceae Typhaceae

ordo Cyperales Cyperaceae

ordo Scitamineae Musaceae Zingiberaceae Cannaceae Marantaceae Lowiaceae

ordo Microspermae Orchidaceae

classis Dicotyledoneae

subclassis Archychlamydeae

ordo Casuarinales Casuarinaceae

ordo Juglandales Myricaceae Juglandaceae

ordo Balanopales Balanopaceae

ordo Leitneriales Leitneriaceae Didymelaceae

ordo Salicales Salicaceae

ordo Fagales Betulaceae Fagaceae

ordo Urticales Rhoipteleaceae Ulmaceae Moraceae Urticaceae Eucommiaceae

ordo Proteales Proteaceae

ordo Santalales subordo Santalineae Olacaceae Dipentodontaceae Opiliaceae Grubbiaceae Santalaceae Misodendraceae subordo Loranthineae Loranthaceae

ordo Balanophorales Balanophoraceae

ordo Medusandrales Medusandraceae

ordo Polygonales Polygonaceae

ordo Centrospermae subordo Phytolaccineae Phytolaccaceae Gyrostemonaceae Achatocarpaceae Nyctaginaceae Molluginaceae Aizoaceae subordo Portulacineae Portulacaceae Basellaceae subordo Caryophyllineae Caryophyllaceae subordo Chenopodiineae Dysphaniaceae Chenopodiaceae Amaranthaceae incertae sedis Didiereaceae

ordo Cactales Cactaceae

ordo Magnoliales Magnoliaceae Degeneriaceae Himantandraceae Winteraceae Annonaceae Eupomatiaceae Myristicaceae Canellaceae Schisandraceae Illiciaceae Austrobaileyaceae Trimeniaceae Amborellaceae Monimiaceae Calycanthaceae Gomortegaceae Lauraceae Hernandiaceae Tetracentraceae Trochodendraceae Eupteleaceae Cercidiphyllaceae

ordo Ranunculales subordo Ranunculineae Ranunculaceae Berberidaceae Sargentodoxaceae Lardizabalaceae Menispermaceae subordo Nymphaeineae Nymphaeaceae Ceratophyllaceae

ordo Piperales Saururaceae Piperaceae Chloranthaceae Lactoridaceae

ordo Aristolochiales Aristolochiaceae Rafflesiaceae Hydnoraceae

ordo Guttiferales subordo Dilleniineae Dilleniaceae Paeoniaceae Crossosomataceae Medusagynaceae Actinidiaceae Eucryphiaceae subordo Ochnineae Ochnaceae Dioncophyllaceae Strasburgeriaceae Dipterocarpaceae subordo Theineae Theaceae Caryocaraceae Marcgraviaceae Quiinaceae Guttiferae or Clusiaceae subordo Ancistrocladineae Ancistrocladaceae

ordo Sarraceniales Sarraceniaceae Nepenthaceae Droseraceae

ordo Papaverales subordo Papaverineae Papaveraceae subordo Capparineae Capparaceae Cruciferae or Brassicaceae Tovariaceae subordo Resedineae Resedaceae subordo Moringineae Moringaceae

ordo Batales Bataceae

ordo Rosales subordo Hamamelidineae Platanaceae Hamamelidaceae Myrothamnaceae subordo Saxifragineae Crassulaceae Cephalotaceae Saxifragaceae Brunelliaceae Cunoniaceae Davidsoniaceae Pittosporaceae Byblidaceae Roridulaceae Bruniaceae subordo Rosineae Rosaceae Neuradaceae Chrysobalanaceae subordo Leguminosineae Connaraceae Leguminosae or Fabaceae Krameriaceae

ordo Hydrostachyales Hydrostachyaceae

ordo Podostemales Podostemaceae

ordo Geraniales subordo Limnanthineae Limnanthaceae subordo Geraniineae Oxalidaceae Geraniaceae Tropaeolaceae Zygophyllaceae Linaceae Erythroxylaceae subordo Euphorbiineae Euphorbiaceae Daphniphyllaceae

ordo Rutales subordo Rutineae Rutaceae Cneoraceae Simaroubaceae Picrodendraceae Burseraceae Meliaceae subordo Malpighiineae Malpighiaceae Trigoniaceae Vochysiaceae subordo Polygalineae Tremandraceae Polygalaceae

ordo Sapindales subordo Coriariineae Coriariaceae subordo Anacardiineae Anacardiaceae subordo Sapindineae Aceraceae Bretschneideraceae Sapindaceae Hippocastanaceae Sabiaceae Melianthaceae Aextoxicaceae subordo Balsamineae Balsaminaceae

ordo Julianiales Julianiaceae

ordo Celastrales subordo Celastrineae Cyrillaceae Pentaphylacaceae Aquifoliaceae Corynocarpaceae Pandaceae Celastraceae Staphyleaceae Hippocrateaceae Stackhousiaceae Salvadoraceae subordo Buxineae Buxaceae subordo Icacinineae Icacinaceae Cardiopteridaceae

ordo Rhamnales Rhamnaceae Vitaceae Leeaceae

ordo Malvales subordo Elaeocarpineae Elaeocarpaceae subordo Sarcolaenineae Sarcolaenaceae subordo Malvineae Tiliaceae Malvaceae Bombacaceae Sterculiaceae subordo Scytopetalineae Scytopetalaceae

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Melchior system

Start with the simplest possible case. Write down what Melchior system claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Melchior system 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 Melchior system 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 Melchior system

In research: Melchior system appears in science 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 Melchior system 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: Melchior system is common in secondary-school and first-year university syllabi. It links to neighbouring topics Systems of plant taxonomy, so understanding it makes those chapters shorter.
In everyday life: Look for Melchior system 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.

How to study Melchior system in 20 minutes

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

Frequently asked questions

What is Melchior system in simple terms?

The Melchior system, "a reference in all taxonomic courses", is a classification system detailing the taxonomic system of the Angiospermae according to A. Engler's Syllabus der Pflanzenfamilien (1964), also known as "modified or updated" Engler system.

Why does Melchior system matter?

Because it connects several science 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 Melchior system?

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 Melchior system.