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XXVIII. RUTACE.E. 303 



Petals valvatc or slightly imbricate, with iiiflesed valvate 

 tips, glabrous or scaly. 

 Ovary of 5, rarely fewer carpels, the styles attached below 



the middle 6. Puecalium. 



Ovary of 2 carpels, the style attached above the middle. 

 ■* Flowers small, in sessile, terminal heads .... 7- ^Iickocvbe. 

 I Calyx of coloured petal-like sepals longer than the petals . 8, Geleznowia. 

 J Petals free. Stamens of the same mmiber, free 21. Geijera. 



■ Tribe II. Zanthoxylese. — Trees or shri(bs. Leaves pin7i ate or ^-foHoIafe ic'iih op- 

 f)Osite leaflets, or \-foliolate (truly simple m Gcijera), t/ie leaflets usually large. Ovary 

 lohed. Fruit separating into ctisti?/rt 2-vatved cocci. Endocarp persisterd, or sepa- 

 rating ehisticalhj. Seeds with or wiilwut albumen. Cotyledons usually flattened and 

 broader than the radicle. 



Stamens twice as many as petals. 

 Leaves all or mostly opposite. Cocci dehiscent. 

 3 Leaves pinnate. Petals valvate or slightly imbricate. Seeds 



without albumen 16. Bosistoa. 



Leaves 3-foliolate. Petals valvate or slightly imbricate, with 



inflexcd lips 17* Melicope. 



f Leaves 1-foliolatc, Petals large, broadly imbricate, not iutiexed 19. Medtcosma. 



Leaves alternate, pinnate. Petals valvate. Cocci winged, inde- 



hiscent .22. Pentacekos. 



Stamens the same number as petals. Cocci dehiscent. 



Leaves all or mostly opposite, usually 3-foliolate 18. Evodia, 



/ Leaves alternate, simple , . • . • , . 21. Geijeua. 



Leaves alternate, pinnate 20. Zantiioxylum. 



(See also Flindersia among Meliacea.) 



Tribe III. Toddaliese,— Trees or shrubs, with the habit of Zanthoxylesc. Ovary not 

 lohed. Fruit several-celled, indehiscent, or rarely locidicidally dehiscent. Seeds albumi- 

 ^ous (iu the Australian genus). 



^ Leaves 1-foliolate. Stamens twice as many as petals 23. Achonychia. 



Tribe IV, Aurantiese. — Trees or shrubs. Leaves pinnate, with usually alternate 

 leaflets, or l^follolate or simjjle. Stamens itcice as many as petals or more. Ovary 

 ^ot lobed. Fruit indehiscent. Seeds without albumen. 



Leaves all or mostly pinnate. No thorns. 



ilowers in terminal, flat, corymbose panicles. Filaments subulate. 

 Petals valvate or nearlv so. Cotyledons much folded. Plowers 



) small . . . i 2^- MiCKOMELUM. 



Petals imbricate, erect.- Cotyledons flat. Flowers large . . 26. Murraya. 

 Plowcrs in oblong, pyramidal, or loose axillaiy or terminal pani- 

 cles. Filaments dihitcd at the base or middle. 



Ovules solitary. Leaflets few 24. Glycosmis. 



^ Ovules 2 in each cell. Leaflets numerous .,27. ClausExXA. 



Leaves all simple or 1-foliolatc, coriaceous. Thorns axillary. 

 ^ Ovary 5- or fewer celled, with 1 or 2 ovules iu each cell ... 28. Atalantia. 



Ovary 6- or more celled, with 4 or more ovules in each cell . . 29. Crruus. 



. Tribe I. Boronie.e.— Shrubs, very rarely arborescent. Leaves simple, 

 3-folioIatc or rarely pinnate, with opposite small leaflets. Ovary lobed. Frnit 

 separating into distinct 2-valved cocci. Endocarp separating elastically. 

 ^ee(ls albnnunous. Embryo usnally terete.— The tribe diilers from the S. 

 -^Inean Diosmeee cliiefly in the presence of albnmen. 



1. ZIERIA, Sm. 

 Calyx 4-cleft. Petals 4, imbricate or idmost valvate in the bud, spreadin 





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