168 Lxx. RUBiACEiE (hieen). [Pavetfa. 



impressed on the fleshy placentas, amphitropous. Berry pea-shaped, 

 rather fleshy ; pyrenes 2, chartaceons. Seeds convex outside, concave 

 or excavated on the inner face ; nmbilicas ventral ; testa membranous ; 

 albumen horny, uniform, excavated on the inner face ; embryo dorsal, 

 curved, cotyledons foliaceous, radicle terete, inferior. — Shrubs or 

 small trees with opposite or rarely ternate leaves, ovate apiculate sti- 

 pules connate at the base, and white or greenish hermaphrodite 

 flowers arranged in terminal or rarely axillary bracteolate corymbs. 



A genus of considerable size chiefly inhabiting the tropical and subtropical regions 

 of the old world. All our species appear to be endemic. The bracteoles are not at 

 the base of the calyx, as is common in Ixora, but are placed lower down. 



Inflorescence terminal and sometimes also subterminal (or 

 terminating short lateral branches in P. suhccma). 

 Calyx-lobes equal, open in ?estivation. 

 Glabrous except the inflorescence. 



Leaves elliptical or obovate, wedge-shaped at the 

 base. 

 Calyx-limb subtruncate or half-cleft. 

 Style undivided. Leaves 2-9 in. long. 



Stigma pubescent 1. P. hr achy calyx. 



Stigma glabrous or puberulous. 



Inflorescence glabrous, divaricately 



branched. Leaves 7-9 in. long . , . % P. Mannii. 

 Inflorescence puberulous ; branches not 



divaricate. Leaves 4r-6| in. long . . 3. P. nwnticola. 

 Style bidentate at the tip. Leaves 9-12 in. long 4, P. hidentata. 

 Calyx-limb deeply lobed, more than half cleft 

 (Crinita). 

 Leaves elliptical. Calyx -—-l in. long. 



Style ^ in. long, about twice the length of 



the expanded flower 6. P. owariensis. 



Style 1 in. long, about three times the 



length of the expnnded flower .... 6. P. glauccscens. 



Style \\ in. long, about four times the 



length of the expanded flower .... 7. P. ptiberula. 



Leaves somewhat obovate. Calyx | in. long . 8. P. crebrifolia. 

 Leaves oval, not much narrowed at the base. 



Leaves membranous, not caudate-acuminate . . 9. P. macrosepala. 

 Leaves tirnily chart aceous, caudate-acuminate . . 10. P. neurocarpa. 

 Leaves and branches more or less pubescent tomentose 

 or hispid. 

 Calyx small, with 4 short deltoid teeth , , . , 11. P, siihcana. 

 Calyx-teeth subulate. 



Style exserted by |-1 in. or less. 

 Corolla glabrous outside. 



Flowers ^-f in. long (exclusive of the ex- 

 serted style), slender . . .. . . . 12. P. gracilis. 



Flowers 1-1^ in. long (exclusive of the ex- 

 serted style), rather robust . . . . 13. P. abyssinica. 



Corolla pubescent outside. 



Corolla-lobes oval, mucronulate. Leaves 



oval 14. P, Olivcriana. 



Corolla-lobes acuminate. Leaves elliptical . 15. P, mollis. 

 Style exserted by 1^-2 in. 



Corolla-throat pubescent. Branches gla- 



brate 16. P. dolichosepala. 



