ARTIFICIAL KEY TO THE FAMILIES. xli 



sepals and petals 5 ; stamens sometimes numerous, 

 inserted outside a prominent disk ; trees or shrubs, 

 sometimes climbing, sometimes thorny 



XXXIV. RUTACEAE. 



Leaves not gland-dotted : 



Leaves opposite, simple ; calyx-lobes and petals 

 5 ; stamens 10 ; disk obscure ; ovary 3-celled, 



cells 1-ovuled XXXI. MALPIGHIACEAE. 



Leaves alternate ; or if opposite, then disk large 

 or stamens 5 : 



Carpels syncarpous and septate or apocarpous ; 

 ovules few : 



Stamens alternate with the petals : 



Ovules and seeds pendulous ; or if hori- 

 zontal (some Meliaceae), then the filaments 

 united into a tube : 



Leaves compound ; or if simple, then 

 the filaments united into a tube : 

 Filaments free ; fruit drupaceous, 

 indehiscent ; leaflets opposite 



XXXV. SlMARUBACEAE. 



Filaments united into a tube ; or if free, 

 then the fruit capsular or the leaflets 

 alternate. . . . XXXVIII. MELIACEAE. 

 Leaves simple : 



Petals 2-lobed, imbricate ; raphe of 

 seed ventral 



XXXIX. DlCHAPETALACEAE. 



Petals entire ; raphe of seed dorsal : 

 Petals valvate ; fruit 1 -celled, 



1-seeded XLII. ICACINACEAE. 



Petals imbricate ; fruit of 3-5 

 1-seeded, free or connate stones 



XLIII. AQUIFOLIACEAE. 

 Ovules and seeds erect or ascending : 

 Ovary 3-5-celled ; leaves simple : 

 Sepals and petals 4-5 ; stamens 4-5 ; 

 seeds arillate, usually albuminous 



XLIV. CELASTRACEAE. 

 Sepals and petals 5 ; stamens 3 ; seeds 

 not arillate, not albuminous, sometimes 

 winged .... XLV. HIPPOCRATEACEAE. 



