46 iv. ANONACE^I. (Hook. f. & Thorns.) 



connective produced into an oblong dilated or truncate head. Ovaries 1 or 

 more, apocarpous, very rarely (Anona) syncarpous with distinct stigmas, 

 style short or ; ovules 1 or more. Fruit of 1 or more sessile or stalked 

 1- or many-seeded usually indehiscent carpels. ,sVf/x large ; testa crus- 

 taceous or coriaceous ; albumen dense, ruminate, often divided almost to the 

 axis into 4 series of horizontal plate* ; embryo small or minute, cotyledons 

 divaricating. DISTRIB. Tropics of the Old World chiefly ; genera about 40 

 with 400 species, the determination of which is exceedingly difficult. 



TRIBE I. UvarieaB. Petals 2-seriate, one or both series imbricate in 

 'bud. {Stamens many, close-packed ; their anther-cells concealed by the 

 overlapping connectives. indefinite. 



Flowers 1 -sexual ; ovules many ; torus conical ..... 1. S \RPUS. 



Flowers 2-sexual ; ovules many, rarely tew ; torus almost flat 2. UVARIA. 

 Flowers 1-2-sexual ; ovule solitary ......... 3. ELIPEIA. 



TRIBE II. Unonese. P>tat* valvate or open in bud, spnadin.tr in flower, 

 flat or concave at the base only, inner suhsimilar or o. tf'n/i> us many, 

 close-packed, their anther-cells concealed by the overlapping connectives. 

 Ovaries indefinite. 



* Petals conniving at /// imentandct 



Ovaries 1-3, many -ovuled : 1 .... 4. CYATII> ( \ 



Ovaries many, 2-ovul.Ml ; peduncle* hooked ...... o. AKI-.M'.IIM 



Ovaries many ; ovules 4 or inoiv ; i>.'lu; i; i,. straight . . . (3. DKUPANANTUUS. 



** Petal* flat ; jpnadinfffrom tJte base. 



Ripe carpels indehitodot. 



Ovules many. L' MT ! uiccolato ...... M;A. 



Ovules many, 2 seriate ; petall bro*d-OVt6 ..... 8. CYATIIOSI-KMITA. 



Ovules 2-1 ii tin- ventral suture ...... 



Ovules 1-2, basul or subbaaal .......... in. I'OI.YAI.THIA. 



Ripe carpels lollicular ............. 11. AXAXAOOKEA. 



*** Inner petals vale at t\, tip incurved. 



12. POPOWIA. 



TBIBE III. Mitrephoreee. J^trd* valvat* 1 in bud, outer sj)reading; 

 iniK r dissimilar, concave, coiinivfiit, arching over the stamens and pistil. 

 &/"//"/ many, close jiackcd, anther-cells concealed by the overlapping con- 

 nectives. Ovuri'x indefinite. 



* Inner petal* not clawed. 



Inner petals smaller than the outer ......... 13. OXYMITRA. 



Inner petals much larger than the outer ....... 14. PH^KANTHUS. 



** Inner petals clawed, iisuallii >//"///-/- titan the outer. 



Ovules 1-2, near the base of the ovary ....... 15. GONIOTHALAMUS. 



Ovules many ................ 16. Mn KKI-JIOKA. 



TRIBE IV. Xylopieee. Petal* valvate in bud, thick and rigid, connivent, 

 inner similar but smaller, rarely o. titunirn* many, c .<ed, anther- 



cells concealed by the produced connectives. Ovaries indefinite. 



Ovules solitary ; fruit fleshy, of many connate carpels . . . 16.* ANONA. 

 Ovules 2- QO ; outer petals broad ; torus convex ..... 17. MELODORUM. 

 Ovules 2-QO ; outer petals narrow ; torus flat or concave . . 18. XVI.UPIA. 



