12 2 Apocynacecs. 



The spines appear to be the modified lowest pair of 1. of suppressed 

 branchlets. The stem-leaves are often suppressed on the flowering 

 shoots, so that the infl. appears as an interrupted spike of whorls, but the 

 axillary spines, much reduced in size, usually remain. I ^am not aware 

 whether it has any medicinal uses in Ceylon. 



LXXXIV,— APOCYNACE^. 



Trees, shrubs (often climbing), or rarely herbs, 1. opp. 



(whorled in Alstonia and Ochrosia, alt. in Cerbera), entire, 



without stip. ; fl. large or small, regular, bisexual ; cal. free, 



often with glands or scales at the base within, small, segm. 5 ; 



cor. salver-shaped with a long tube or rotate with a short one, 



rarely funnel-shaped, lobes 5 (rarely 6), contorted, overlapping 



to left or to right; stam. 5, inserted in tube or throat of cor., 



anth. distinct (rarely connate) but often connivent, either free 



or adnate to stigma, longitudinally dehiscent, pollen ordinary, 



granular; disk when present annular; ov. superior, usually of 



2 distinct carp., rarely i -celled, with parietal placentas or 2- 



celled, with few or numerous ovules, style i, simple, often 



much thickened at summit, stigma bifid; fruit usually of 2 



dehiscent follicles, more rarely indehiscent and fleshy (in 



Alyxia moniliform); seeds i, 2 or numerous, with or without 



a coma of long hair at one end (at both in Alstonia), with or 



without endosperm. 



Ov. syncarpous {Carissece) (see also 12-14). 



Ov. I -celled; fruit large, globose . . . i. WiLLUGHBElA. 

 Ov. 3-celled ; fruit small, ovoid . . .2. CarisSA. 

 Ov. of 2 distinct carp. 



Anth. free from stigma {Plianertea). 

 Fruit-carp, indehiscent, 1-2-seeded. 



Carp, pulpy, i -seeded; 1. whorled . . 3. Rauvolfi.A. 

 Carp, moniliform with i -seeded joints . 4. Alyxia. 

 Carp, usually 2-seeded. 



Fruit fleshy ; 1. opp 5. HUNTERIA. 



Fruit fibrous-woody ; 1. alt. . . .6. Cerbera. 

 Carp, spongy-woody, I -seeded ; 1. whorled 7. 0CHR0Sl.\. 

 Fruit-carp dehiscent (follicles), many-seeded. 

 L. opposite. 



Herb ; seeds without a coma . . 8. ViNCA. 

 Tree; seeds comose . . . .9. Holarrhena. 

 Tree; seeds without a coma . . 10. Tabern.'emontana. 

 L. whorled, seeds with hair at both ends 1 1. Alstonia. 



