(from the article `shamrock`) ...each of whose leaves is divided into three leaflets. Plants called shamrock include the wood sorrel (Oxalis acetosella) of the family Oxalidaceae, ... The Fabales (legumes) may be considered a single family (Leguminosae or Fabaceae) as defined in 1981 by the British botanist R.M. Polhill and the ... [...
Found on http://www.britannica.com/eb/a-z/f/1
Plants of this family are found throughout the world, growing in many different environments and climates. A number are important agricultural plants, including: Glycine max (soybean), Phaseolus (beans), Pisum sativum (pea), Cicer arietinum (chickpeas), Medicago sativa (alfalfa), Arachis hypogaea (peanut), Ceratonia siliqua (carob), and Glycyrrhiz
Found on http://en.wikipedia.org/wiki/Fabaceae
Found on http://www.encyclo.co.uk/local/21767
No exact match found