194 FLOKA OF JAMAICA Annona 



Family XXYII. ANNONACE^. 



Trees or shrubs. Leaves alternate, entire, without stipules. 

 Flowers terminal or opposite the leaves or axillary, solitary or 

 clustered, hermaphrodite. Sepals 3, more or less united at the 

 base, valvate. Petals 6, in two series, valvate or slightly 

 imbricate, the inner series sometimes very small or altogether 

 wanting. Stamens generally numerous (6-18 in Bocagea) on the 

 thick receptacle ; connective produced beyond the cells of the 

 anther. Carpels numerous or 1-6, free or somewhat cohering ; 

 ovules 1 erect, or 2-8 affixed to the ventral suture. Carpels 

 fleshy, free or united into a single large fruit. Seeds with 

 copious ruminate endosperm. Embryo minute near the hilum. 



Species about 800, natives mostly of the tropics, a few only 

 being found in subtropical regions. 



Carpels united into a single fruit 1. Annona. 



Carpels free. 



Connective truncate. Ovules 2-6 in each carpel 2. Xylopia. 



Connective long produced. Ovule one in each carpel .... 3. Oxandra. 



1. ANNONA L. 



Small trees or shrubs. Flowers generally solitary, stalked, 

 terminal or opposite the leaves. Sepals minute. Petals of the 

 outer series fleshy, more or less partially closed ; inner petals 

 somewhat similar or smaller or wanting. Receptacle hemi- 

 spherical. Carpels numerous, often cohering ; ovule solitary, 

 erect. Fruit large, formed of the united carpels. 



Species 60, natives of tropics in America, Asia and Africa. 



1. Petals 6, the 3 inner conspicuous. Leaves 

 glabrous. 



Fruit with long, curved spines 1. A. muricata. 



Fruit with minute, straight spines 2. A. montana. 



Fruit smooth. 



Inner petals only slightly shorter than the 



outer 3. A. glabra. 



Inner petals much shorter than the outer... 4. A. palustris. 



2. Inner petals reduced to minute scales, or 

 wanting. 

 Petals oblong, keeled on the inner side. 

 Leaves elliptical-oblong or lanceolate. 



Fruit tuberculate 5. A. sqtiamosa. 



Fruit smooth 6. A. reticulata. 



Leaves elliptical, velvety or downy beneath. 



Fruit smooth 7. A. cherimcla. 



Fruit tuberculate 8. A. pt'cstermissa. 



Petals ovate. Leaves oblong-elliptical, downy 



beneath with minute hairs 9. A. jamaicensis. 



