318 SYSTEMATIC BOTANY 



to a much smaller one, the Vetch or VICIA group, in 

 which the leaves are evenly pinnate, and end in tendrils. 

 This tendril is plainly homologous with the terminal 

 leaflet of, say, the Indigo. To this group also belongs 

 ABRUS PRECATORIUS, L. whose red and black seeds are 

 used by jewellers as weights. PONGAMIA and one or 

 two other genera form a small group by themselves, in 

 that the pods contain only one seed when ripe and 

 -do not open. They are often winged (see chapter 

 xxiv). All these have diadelphous, or in some cases 

 monadelphous stamens, but there are also a few which 

 have the stamens all free. 



C^SALPINE^E 



The commonest or best known examples of this 

 family are on the plains, POINCIANA REGIA, Bojer. the 

 Gold Mohur, and C^ESALPINIA PULCHERRIMA, SwtZ. 

 {the flowers of which have been described in chapter 

 xvii), various species of CASSIA, e.g. CASSIA FISTULA, 

 L. the Indian Laburnum, and the Tamarind TAMARIN- 

 DUS INDICA, L. and on the hills, the common yellow 

 flowered CASSIA TOMENTOSA, L. They are trees with 

 pinnate or bipinnate leaves, and have in common that 

 the flowers are more or less regular, and have five 

 sepals, five petals, ten stamens arranged along the edge 

 of the disc at the top of a slightly hollowed pedicel, 

 and that in bud the lower petals are outermost, the 

 upper (odd), petal being inside of all, not outside, as 

 is the corresponding standard of the PAPBLIONACE.E. 



In the Tamarind, SARACA and AMHERSTA, the calyx 

 tube is long, with the disc and the sepals and petals 

 (no petals in SARACA) at the end. 



