one of my interests is what weeds are edible here's the first in several offerings: Portulaca oleracea - Purslane or Munyeroo or Pigweed This â€œweedâ€ occurs in our yard over summer/autumn and of which we add a few leaves/stems into our salads. It is a flat plant with triangular fleshy leaves on fleshy stems and has tiny yellow flowers. There are cultivated varieties that have larger leaves and flowers however. The aborigines apparently harvested this plant for the tiny seeds that were ground into a flour and baked as well as eating the leaves and stems. Ref Tim Low â€“ Wild Food Plants of Australia Nutritionally it contains more omega 3 fatty acids than any other leafy plant along with vitamins A and C ,other potent anti-oxidants and minerals such as Mg, Ca, K and Fe. It was widely used historically in many cultures with evidence of use from about the 7th century BC. Ref : http://en.wikipedia.org/wiki/Portulaca_oleracea Now some science from Pubmed --there were 147 citations. Here are some that I found interesting: 1. In a rat model of Diabetes an extract of Purslane significantly reduced fasting blood sugar, total cholesterol , total triglycerides and increased the level of HDL ( the good cholesterol). There were no adverse effects found. 2. Another fascinating study investigated anti-aging effects of purslane. In a mouse model Purslane treated mice showed signicantly improved learning and memory compared to controls. At autopsy the Purslane treated mice had some really interesting findings, such as increased telomere length and upregulated telomerase activity. 3. Apparently Purlane has been used in Iran for many years for abnormal uterine bleeding. Sure enough, a trial did show significant benefit in 80% of women using it for this purpose. 4. Purslane has at least 3 novel anti-oxidants that are stronger than Vitamin C 5 The Iranians have also used Purslane for asthma historically and a trial did demonstrate improved lung function similar to Theopylline but not as good as Salbutamol (Ventolin) 6 Other studies indicate it has analgesic and anti-inflammatory effects topically but not orally. It may also have a beneficial effect on wound healing . Ref : http://www.ncbi.nlm.nih.gov/sites/entrez - type in Purslane I did not find any reports of problems using this plant in my research. It seems like a worth while addition to the salad!