LI. EUTACE^l. 



317 



Rue. 

 Vertical section of flower (mag.). 



Rue. 

 Quinary flower (mag.). 



Rue. 

 Juateruary flower (mag.). 



\ 

 Rue (Rula graceulens). 



Perennial HERBS, often suffruticose at the 

 base. LEAVES alternate, simple, variously cut, 

 rarely quite entire, usually pellucid-dotted or 

 tubercled; stipules 0, or replaced by 2 bristle- 

 like teeth at the base of the leaves (Peyanum). 



FLOWERS $ > regular, terminal, in racemes or a corymb, yellow, or sometimes white. 

 CALYX persistent, 4-5-partite, aestivation imbricate. PETALS 4-5, inserted at the base 

 of a shorter or longer gynophoae, sestivation imbricate. STAMENS inserted with the 

 petals, generally double, sometimes triple (Peganum), rarely equal (Thamnosma) in 

 number; filaments filiform, free, or sometimes shortly monadelphous, base often 

 dilated; anthers iiitrorse, connective sometimes glandular at the tip (Haplophyllum) , de- 

 hiscence longitudinal. OVARY deeply 2-3-5-lobed, 2-3-5-celled, seated on a gynophore 

 usually dilated at the base into a glandular disk ; styles central, sometimes distinct 

 at the base and top (Bcenninghausenia], usually connate, stigmatiferous at the top, 

 or on the angles ; ovules 3-4-oo in each cell, inserted on a projecting placenta at the 

 inner angle of the cell, 2-seriate, anatropous or seini-anatropous. FRUIT a capsule, 

 sometimes opening in 3-4 loculicidal valves (Peganum), sometimes in 4-5 lobes 

 opening at the top (Ruta), sometimes fleshy and indehiscent (Ruteria), sometimes 

 separating into cocci (Dictamnus, Boenninghausenia) , eiidocarp sometimes crustaceous 

 or cartilaginous, and separating from the epicarp (Dictamnus). SEEDS pendulous, or 

 ventrally fixed ; testa crustaceous or spongy, pitted and granular ; albumen fleshy. 

 EMBRYO axile, curved or rarely straight (Dictamnus) ; radicle superior. 



*Euta. 



PKINCIPAL GENERA. 

 Peganum. *Dictanmus. 



*Bcenninghausenia. 



Rutacete are very closely allied to Diosmees, which can only be distinguished from them by the 

 woody stem, the 2-ovuled ovarian cells, and the usually straight embryo. They also approach Zygophyllw, 



