30 



APOCYNACEM. 



[Caeissa. 



1. Carissa. 



pollen granular. Dish annular, cupular, or of scales, sometimes con- 

 cealing the ovary, or 0. Ovary 1-ceiled, with 2 parietal placentas, 

 or 2-celled with axile placentas, or of 2 distinct or partially connate 

 carpels, style simple or divided at the base only, thickened at the top ', 

 stigma 2-fid, obtuse or acute ; ovules few or many in each carpel. 

 Fruit a berry drupe or samara, or of 2 baccate or follicle-like meri- 

 carps. Seeds various, often with a tuft of hairs at one or both ends 

 or winged ; albumen hard or fleshy, or scanty or ; embryo straight. 

 Cotyledons flat or contorted. — Species over 900, chiefly tropical. 



Anthers included, free from the stigma, cells 

 with rounded bases. 

 Ovary of 2 completely connate carpels, 

 fruit a berry, seeds neither winged nor 

 comose, corolla- lobes overlapping to 

 the left. Spinous shrubd . 

 Ovary of 2 carpels, united usually by the 

 style (see Rauwoljia). 



Calyx not glandular inside, corolla- 

 lobes overlapping to the left. 

 Fruit indehiscent, of 2 more or 

 less c nnate l-3eeded drupes, 

 leaves whoried. A shrub . 

 Fruit dehiscent, of 2 slender free 

 follicles. 



Leaves opposite, seeds not 

 cotnose .... 

 Leaves whoried, seeds comose 

 at both ends 

 Calyx glandular inside. 

 Seeds comose at the apex, follicles 

 many-seeded, covolla-lobes over- 

 lapping to the right . 

 Seeds few, imbedded in pulp, not 

 comose, corolla-lobes overlapping 

 to the left .... 

 Anthers included or exserted, cohering in a 

 cone round the style and attached to it, 

 cells spurred at the base, ovary of 2 carpels 

 united by the style only or (in Vallaris) 

 connate in flower, fruit follicular. 

 Anthers exserted, leaves opposite. 



Mouth of corolla without scales, the 



lobes overlapping to the right 

 Month of corolla with a corona of 

 scales, the lobes overlapping to the 

 lettj • . «... 



2. Rauwolfia. 



3. lochneea. 



4. Alstonia. 



5. holaerhena. 



6. Eevatamia. 



7. Vallaris. 



8. Wrightia. 



