14 III. A-NONA-CE^l (OLIVER). 



exstipulate. Flowers axillary, terminal, or variously extra-axillary, solitary 

 or fascicled, rarely cymosely racemose or panicled, sessile or pedicellate, 

 hermaphrodite or rarely unisexual. 



A large Order, confiued to tropical and subtropical regions of both hemispheres. Of the 

 13 genera included in the Tropical African flora, 6 are peculiar, 6 are shared with Asia 

 and the East, and but 2 {Anona and Xylopia) are common to Africa and America. From 

 the numerous additions which have been recently made to this family from Tropical Africa, 

 it is probable that there yet remain many new forms to be discovered which may materially 

 modify the circumscription of the genera. Under the circumstances, I have preferred to 

 leave a few species doubtfully assigned, rather than attempt a general and premature revision 

 of the Order. I have left unnoticed here several specimens too imperfect for satisfactory 

 description in the herbaria which I have examined. 



Pistil syncarpous. Ovary 1-celled with indefinite parietal ovules. 



Outer petals usually wavy 13. Monodora. 



Carpels indefinite, the ovaries connate or immersed in the torus, 



each with a solitary erect ovule 1. Anona. 



Carpels 3 or more. Ovaries free. 



Petals 3, opposite to the sepals 2. Enantia. 



Petals 6, or 3 alternate with the sepals. 



Tuner petals much exceeding the outer 3. Piptostigma. 



Petals nearly equal or inner smaller. 



Inner petals imbricate in sestivation 4. Uyaria. 



Inner petals valvate in aestivation, or very small and dis- 

 tinct. 

 Calyx closed in bud, splitting across the top .... 5. Cleistochlamys. 

 Calyx 3-lobed, or of 3 free sepals. 



Stamens 10 or fewer 6. Clathrospermum. 1 



7. (PoLYALTHIA £ •) > 



Stamens indefinite, numerous. 



Petals connate at the base in a short ring ... 8. Hexalobus. 

 Petals free. 



Flowers upon sharply-hooked, woody peduncles. 



Petals nearly equal. Ovules geminate, erect . . 9. Artabotrys. 



Flowers axillary. Inner petals shorter. Torus 

 plane or concave in the centre. Styles con- 

 nivent in an elongate cone 10. Xylopia. 



Flowers axillary. Inner petals shorter, more 

 or less connivent. Torus convex. Styles or 

 sessile stigmas distinct. Ovules 1-3 . . .11. Oxymitra. 



Flowers extra-axillary. Inner petals shorter, 

 connivent, thick and triquetrous above. Con- 

 nective not dilated above the anther-cells. 

 Ovules solitary 11. Oxymitra. 



Flowers terminal or extra-axillary. Inner pe- 

 tals not thickened. Connective dilated and 

 globose or truncate above the anther-cells. 



Ovules 2- go 12. TJnona. 



(See Uvaria scabrida) 



Flowers extra-axillary, polygamous. Petals equal, 



narrow-linear. Ovules 1 or 2 7. Polyalthia. 



1. ANONA, Linn. ; Benth. and Hook. f. Gen. PI. i. 27. 



Flowers hermaphrodite. Sepals 3, usually small and valvate in sestivation, 

 free or connate below. Petals 6, or the 3 inner suppressed ; outer petals 

 fleshy or thick and coriaceous, concave, at least at the base, spreading or con- 



