602 



BOTANY 



in tin- i-ortex or in the heart-wood. A. >;,/,',/,,/ (Fig. 630) ami -/ .-/'/ an- Ka-t 

 Indian trees from which Catechu is obtained. 



OFFICIAL. By the disorganisation of the parem-hynia of the stein of A<->-< 

 xi-nfijiil (Soudan and Senegamhia) and of other species, AI-ACIAK <;TMMI is ohtainrd. 

 Tliis exudes from wounds as a thick fluid and hardens in the ,-iir. 



Family 2. Caesalpiniaeeae. Trees or shrubs with pinnate or 

 bipinnate leaves. Flowers usually somewhat dorsiventral. Corolla 



(* nat. si/<>. Al'ti-i A. MKYKK and SCHI - MAXX.) OFF/CIA/.. 



with ascending imbricate aestivation (Fig. 631) or wanting. Typical 

 floral formula: K 5, C 5, A 5 + 5, Gl. The number of petals and 

 stamens is often incomplete. Embryo straight. 



IMPORTANT GENERA. Characteristic examples of the Caesalpiniaeeae are 

 afforded by the flowers of Cassia. In the sub-group Seniw, to which C. a/i.<tusti- 

 folia belongs, the sepals and ]>etals are both five in number and free (Fig. 632). 



