Prescribing based on Kingdoms is too close for comfort to the doctrine of signatures.
Doctrine of signatures is an idea that a remedy source will tell you what diseases it can treat. For example, a plant that has yellow flowers will treat liver issues. This kind of thinking is common in folk medicines, and especially in Christian and Muslim traditions; in traditionally Muslim or Christian nations, folk healers believed Allah/God deliberately made plants look like the parts of the body the plant could heal.
This idea has often proved useful in folk medicine, however it has no place in homeopathy. Homeopathy, as stated before, is matching a proving symptom to the symptom of the patient. Where the remedy is derived from has no implications for its prescription. Prescribing based on which kingdom the remedy comes from or where the remedy comes from in the periodic table directly implies that a remedy's source can tell us its use. For example: a mineral is structured, therefore the person who needs a remedy prepared from a mineral will have structural issues. This is a vast generalization, and there are many exceptions to such generalizations:
Phosphorus, a remedy made from the mineral phosphorus, produces symptoms of incredible sensitivity and hypersexuality, but sensitivity is associated with plants and hypersexuality is associated with animals. Hyoscyamus niger (a plant) produces some of the most intense sexual mania seen in the materia medica. However hypersexuality is, again, supposedly, a symptom associated with the "animal" symptom. The classic example of a "split in two" personality (a symptom associated with animals) is Anacardium orientale, another plant remedy. Even generalizing based on plant families can lead us astray. The solanaceae family includes the highly poisonous Datura stramonium, Atropa belladonna, (both lethal in small doses) but also potatoes, eggplants and tomatoes. Attempting to generalize based on remedy source will filter the remedies into artificial categories that can easily confuse a remedy prescription.
Hahnemann in Essay on a New Principle (Hahnemann's Lesser Writings, page 249) explains that we cannot generalize based on the remedy's origins (although such connections can be useful in memorizing), but rather we must pay attention to the proving symptoms in determining prescriptions.
Generalizing in this way is detrimental in another way: it's a generalization. My interpretation of the people I meet in the field of alternative health, and homeopathy especially, is that they want a repose from the de-humanizing categorizations and disease labels given to patients by the conventional medical profession. One of the virtues of homeopathy, supposedly, is that it is the only system of medicine that does not categorize people but keeps them as true individuals. This is different from Ayurveda and TCM, which also put people into the categories of "spleen qi deficient" or "vata". If homeopathy puts its patients into these kingdom and miasm boxes, are we not doing exactly the same thing?
Additionally, the definition of homeopathy matching patient symptoms (this does not include normal attributes of your personality) with the symptoms that arose from a proving. Note that in this process, there is no theorizing about the patient nor about the remedy; the process is a simple matching of one set of facts to another set of facts. If we match patient attributes to kingdom traits, we are in fact not practicing homeopathy.
Abstract: Homeopathy. 2006 Oct;95(4):237-44. Heuristics and bias in homeopathy. Souter K.
"The practice of Homeopathy ought to be strictly logical. In the Organon Samuel Hahnemann gives the impression that the unprejudiced observer should be able to follow an algorithmic route to the simillimum in every case. Judgement and Decision Research, however, indicates that when people grapple with complex systems like homeopathy they are more likely to use heuristics or empirical rules to help them reach a solution. Thus Hahnemann's concept of the unprejudiced observer is virtually impossible to attain. There is inevitable bias in both case-taking and remedy selection. Understanding the types of bias may enable the practitioner to reduce his/her own bias."
All practitioners must actively work to discover their own bias. As with all areas of homeopathic study, no shortcut to mastery exists.
In Anshutz's New Remedies you can find the original proving of Chionanthus virginica. For those new to homeopathic language, a proving is when a healthy person takes a dose of a medicine in order to understand the effects that medicine has on the body. Every remedy should be tested in this way before being given to patients. Many provings were done during Hahnemann's time (mid nineteenth century) and the original results have been lost; we only have access to secondary sources: compilations of of the original results with the intent to allow homeopaths to prescribe remedies based on the data.
Recently I went through the original proving of Chionanthus viriginica and I encourage others to do the same. The exercise raised more questions than it answered. How do you decide on time modalities? If someone wakes at 4am, is the symptom: worse at 4am OR is it because the prover took the tincture three hours previously? How many of the symptoms in this one proving characteristic (common and consistent) and how many are specific to this individual prover?
Our materia medica was put into perspective for me; it's a compilation of symptoms that are not as concrete and discreet as they seem. Additionally it became apparent that symptoms can only become concrete and discreet after many provings have been done.
This is the most common question people ask me. The philosophy behind both forms of medicine are relatively similar. They both aim to find the root cause of disease and remove it and stimulate the body to heal itself. There is one difference: Homeopaths only use homeopathy and maybe some lifestyle counselling. Naturopaths use many different types of medicine, such as acupuncture, Chinese medicine, herbal therapies, vitamin therapies, lifestyle counselling and homeopathy.
Naturopaths' large toolbox gives them a unique ability to determine what therapy is best for you and if one therapy doesn't work, they have lots of others to try. However the breadth of their knowledge does not always translate into a depth of knowledge. The homeopathic schools I know in Ontario teach 10 times the amount of information on homeopathy than a Naturopathic college does, with hundreds of hours of clinical, homeopathic, experience included in the degree. Therefore if you know you would like to try homeopathy, I suggest finding a licensed homeopath. Regulations are always changing and different in every country/state/province, so I can't recommend a universally good place to look for a homeopath. If you are in Ontario, as I am, then you want to see a homeopath that is licensed by the Ontario College of Homeopathic Medicine.