1664 



A TEXTBOOK OF THEORETICAL BOTANY 



Fig. 1524. — Pisiim scith'iim. The Edible Pea. Typical 

 papilionaceous flower. 



also belong to this family, among which we may mention Gorse (Ulex), 

 Broom (Cyttsus) (Fig. 1525), Petty Whin (Genista), which are native to 

 Britain, and Wistaria, Laburnum, Lupimis (Lupin), Robinia (False Acacia), 

 Spartiurn (Spanish Broom), Indigofera (Indigo), and Desmodium, which 



Flu. 1525. — Cytisus. Hybrid Johnston's 

 Crimson. Flowering shoot. 



are commonly cultivated. One of the most extensively cultivated members 

 of this family is Arachis hypogaea, the Ground Nut or Pea-nut, which is 

 grown in all warm regions of the world, both for the sake of its edible seeds 

 and for the oil expressed from them. This oil is used on a large scale for 

 making margarine. Many species are well-known field plants, as for 



