Averrhoa] XXIV. GERANIACEJE 111 



Leaflets ovate, acuminate, 2-5 pair. El. small, variegated white and purple, 

 panicles axillaiy, sometimes on the old wood. Calyx glabrous, the shorter 

 stamens usually minute and sterile. Fruit yellow, ellipsoid, 3 in. long, with 5 

 prominent ridges. Funicle of seed dilated into a fleshy bilabiate, irregularly 

 cut arillus. 



Cultivated on account of its fruit for ages in India and Burma, as far north as 

 Lahore. Fl. Febr.-Aug. Fr. C. S. 2. A. Bilimbi, Linn.; Bedd. PI. Sylv. t. 117. 

 Viiii. Bit unlit, Hind. Cultivated and run wild in tropical India. Leaflets oblong, 



acuminate, 0-14 pair. Fl. dark brownish purple, J in. long, in panicles on the old w 1 



of stem and branches, inflorescence and calyx rusty pubescent. Fruit yellow, oblong, 

 slightly furrowed, a Is without arillus. 



Order XXV. RUTACEjE. Gen. PI. i. 278. 



Shrubs or trees, a few genera herbaceous, as a rule strongly aromatic. 

 Leaves alternate (except Ecodia and Melicope), compound or simple, dotted 

 with translucent glands, stipules none. Fl. regular, 4-o-merous, rarely 3- 

 merous, sepals free or connate. Stamens as a rule 4-5 or 8-10, filaments 

 usually free, inserted on the outside of an annular or cylindrical disk. Carpels 

 4—5, mostly connate. 



Cavities containing ethereal oil in the tissue of leaves, flowers and fruit as well as in 

 the bark, are an important character of this order, separating it from Meliaceae and other 



allied oilier-. X] thereal oils secreted into these cavities from the surrounding 



tissue cause the aromatic smell of m.>st Butaceoi; in most cases they can readily be 

 seen as translucent glands. 



A. Unarmed, leaves opposite, leaflets entire, i lo wits polygamous. 



Stamens 4-5 1. EVODIA. 



Stamens 8 MELICOPE [). 112). 



B. Unarmed, leaves imparipinnate. 



Styles short, persistent, leaflets 1-5, rarely 7 . . 2. Glycosmis. 

 Styles deciduous, ovary linear, 2-celled . . . ii. Mcrraya. 

 Style deciduous, ovary 4r-5-celled. 



Stamens LO, filaments subulate . . . .1. Mickomklum. 

 Stamens H or 1(1, filaments dilated lie low the sub- 

 ulate tip 5. Clausena. 



('. Unarmed, leaves L-foliolate, flowers polygamous. 



PI. l-iiieroiis, stamens 8 6. Acronychia. 



I'M. o-meroiis. sti nso 7. Skimmia. 



D. Mostly armed, leaves 8-foliolate or imparipinnate, petiole often « inged. 



Ovule- I ■_! in end 11. 



Stamens ;{-s, flowers often unisexual . . 8. Zanthoxylum. 



Stamens 8 LO, flowers bisexual . . . .9. Liuonia. 



( hull-- numerous in each cell. 



Leaves Imparipinnate ...... LO. Pkronia. 



Leaves trifoliolate II. .F.i.u. 



E, Mostly armed, leaves S-foliolate. 



PI. unisexual ........ 12. Todd am a. 



PI. bisexual. 



PI. 8- rous, stamens 6, leaflets crenate . . Thifiiasia p. L20). 



Fl. 4-5-merous, leaflets coriaceous, entire . . L8. Luvcnoa. 



P, Mostly an I. leaves L-foliolate. 



( >\ ules I •_' in each cell. 



Erect, II. in racemes or corymbs, anthers oblong 



or ovale ........ II. Am. avi i \. 



Often scandent, fl. solitary or fascicled , L6. Parahionya, 



Ovules numerous in each cell .... L6. Citbus. 



I. EVODIA, Forst. ; Fl. Brit. [nd. i. 187. 

 Evergreen, mostly aromatic Bhrubs or trees. L. opposite, simple or 



cnni| nd. lcallcls i|iiile entire. Kl. small, polygamous, l-6-merOuS, in 



