R

Ranunculus ficaria

A buttercup-like plant unrelated to the greater celandine, one of the poppy family
Usage: treating piles
Harmful effects: rare cases of hepatitis after use.<wiki/List_of_medicinal_plants#cite_note-58">

Usage: Vaginal steaming
There are many species called chamomile, each with some level of distinct chemical properties. Despite this, chamomile is routinely treated as a single herb and proscribed as such.<wiki/List_of_medicinal_plants#cite_note-UMMRomanchamomile-59"><wiki/List_of_medicinal_plants#cite_note-UMMGermanchamomile-60"> The two most common species are:
Two species are most commonly used, Matricaria nobilis (Roman chamomile) and M. chamomilla (German chamomile)<wiki/List_of_medicinal_plants#cite_note-theherbbook-7">

Used as: an "astringent diuretic, emmenagogue", and claimed to be good for many conditions, including alkaline urine, diarrhea, inflammation, wounds, broken bones, fever, and many others.<wiki/List_of_medicinal_plants#cite_note-theherbbook-7"><wiki/List_of_medicinal_plants#cite_note-149"><wiki/List_of_medicinal_plants#cite_note-150"><wiki/List_of_medicinal_plants#cite_note-151"> There is no evidence to support the use of madder root for any of these conditions.<wiki/List_of_medicinal_plants#cite_note-madder-152"> The root is used in Ayurveda and Hildegard medicine. Madder root is also used for dyeing fabrics.
Harmful effects: May cause cancer, birth defects, and miscarriages.<wiki/List_of_medicinal_plants#cite_note-madder-152"> It can also make urine, saliva, perspiration, tears, and breast milk turn red. One wonders if happier root would be any better. An extract of madder root, used as a food coloring in Japan, was found to cause liver cancer in rats.<wiki/List_of_medicinal_plants#cite_note-153">

In TCM: mí dié xiāng (迷迭香)
Used in: vaginal steaming
Claimed to: solve digestion problems, heartburn, flatulence, liver and gallbladder problems, lack of appetite, gout, coughing, headaches, high blood pressure, and age-related memory loss. No such effects have been proven.<wiki/List_of_medicinal_plants#cite_note-WebMDRosemary-184"><wiki/List_of_medicinal_plants#cite_note-UMMRosemary-185">
Beneficial effects:

Lab work shows rosemary has antioxidant properties.<wiki/List_of_medicinal_plants#cite_note-UMMRosemary-185">
Studies suggest long-term rosemary use may prevent thrombosis in humans.<wiki/List_of_medicinal_plants#cite_note-UMMRosemary-185">
Studies suggest rosemary may neutralize several foodborne pathogens.<wiki/List_of_medicinal_plants#cite_note-UMMRosemary-185">
One (one, badly designed, and small) study suggests rosemary, if used topically on the head, may help hair regrowth.<wiki/List_of_medicinal_plants#cite_note-UMMRosemary-185">
Two studies (small, aromatherapy, not compared to placebo) suggest it may help reduce stress.<wiki/List_of_medicinal_plants#cite_note-UMMRosemary-185">
Improved speed and accuracy on a test for a study of a sample people when scent was inhaled.<wiki/List_of_medicinal_plants#cite_note-186">
Contains antioxidants carnosic acid and carnosol .<wiki/List_of_medicinal_plants#cite_note-187"><wiki/List_of_medicinal_plants#cite_note-188"><wiki/List_of_medicinal_plants#cite_note-189"> No proven resulting benefits, however.
Is a little spicy and smells nice.<wiki/List_of_medicinal_plants#cite_note-WebMDRosemary-184"><wiki/List_of_medicinal_plants#cite_note-UMMRosemary-185">

Is probably safe if the leaf itself is eaten; is rated as Generally Recognized as Safe in the U.S.;<wiki/List_of_medicinal_plants#cite_note-AmerPregRosemary-190"> the German Commission E has approved it.<wiki/List_of_medicinal_plants#cite_note-UMMRosemary-185">
May impact blood clotting.<wiki/List_of_medicinal_plants#cite_note-UMMRosemary-185">
May impact ACE inhibitors, taken for high blood pressure.<wiki/List_of_medicinal_plants#cite_note-UMMRosemary-185">
Is diuretic .<wiki/List_of_medicinal_plants#cite_note-UMMRosemary-185">
May impact blood-sugar levels.<wiki/List_of_medicinal_plants#cite_note-UMMRosemary-185">
Large quantities of rosemary leaves can cause vomiting, spasms, comas, and pulmonary edema .<wiki/List_of_medicinal_plants#cite_note-UMMRosemary-185">
Large quantities of rosemary leaves may increase menstrual blood-flow and can cause miscarriage and is rated Possibly UnSafe in the U.S. Even while pregnant, however, it is safe to eat as a spice in food.<wiki/List_of_medicinal_plants#cite_note-UMMRosemary-185"><wiki/List_of_medicinal_plants#cite_note-191">
"People with high-blood pressure, ulcers, Crohn's disease, or ulcerative colitis should not take rosemary."<wiki/List_of_medicinal_plants#cite_note-UMMRosemary-185">
Rosemary oil may be toxic if consumed orally.<wiki/List_of_medicinal_plants#cite_note-UMMRosemary-185">