436 



DICOTYLEDONES. 



fruit a capsule with many winged seeds in Swietenia (Mahogany tree ; Trop. 

 Am.), C'edrela, etc. ; berries in others. The wood of Cedrela is used for making 

 cigar boxes. 550 species ; tropical. 



Order 3. Rutaceae. Leaves glandular with pellucid dots. 

 The type is the same as that of the family. Flowers 4-5-merous. 

 The ovary is most frequently 4-5-grooved. Disc well pronounced, 

 often appearing as a "gynophore." The majority are shrubs with 

 alternate or opposite, compound, more rarely simple, leaves. 



A. The ovary is deeply 2-5-cleft with basal styles which are 

 more or less united ; the carpels in some genera are entirely free 

 (groups 1, 2). The fruit is capsular and most frequently dehisces 

 like follicles along the ventral suture or septicidally, so that a 

 horn-like internal layer (endocarp) separates elastically from the 

 external layer. 



1. ZANTHOXYLE.E. ZantUoxylum ; Choisya ; Evodia. 



2. BOKONIE.E. Australia. Correa. 



3. DIOSME^;. Heather-like shrubs; Africa. Diosma, Coleonema, En>j)leimnn 

 and Barosma. OFFICINAL : Baro*ma crenulata and betulina, " broad Buchu 

 leaves" (B. serratifolia and Empleurum semtlatum, "narrow Buchu -leaves"). 



FIG. -165. Enta. Flower (mag.). 



FIG. 466. Eula. Longitudinal section of flower. 



FJG. 467. Ruta. Floral diagram. 



4. RUTEJ:. Ruta (Figs. 465-467) graveolens is an herbaceous, 

 glaucous, strongly smelling plant with bipinnate leaves and yellow 

 flowers ; the terminal flower is 5-merous, the others 4-merous 

 (S. Eur.). Dictamnus ; zygomorphic flower. The individual carpels 



