116 THE JOURNAL OF BOTANl 



Flowers sessile or with relatively short pedicels. 



Inflorescence axis very sinuous, indefinite ; flower-buds 



hispid, with yellowish hairs 3. B, laxissima. 



Inflorescence axis not very sinuous, well pronounced ; 

 flower-buds not hispid. 

 Open corolla less than 1 cm. long, subglabrous ex- 

 ternally 4. B. Batesii. 



Open corolla 2 cm. to 2*5 cm. long, white or grey, 



sericeo-tomentose externally 5. B. Idxa. 



Flowers with pedicels 8 mm. long 6. B. pedicellata. 



Inflorescence usually not very long nor lax nor much, if at 

 all, exceeding the leaves ; main rachis straight and well 

 pronounced. 

 Flowers 5-7 mm. long at most. Bracteoles inconspicuous, 

 minute or obsolete. (Tropical American.) 



Branchlets usually glabrous 7. B. gonzaleoides. 



Branchlets usually cinereo-pilose (but see B. guianensis). 



Berries usually not ribbed ; calyx glabrous, or nearly so. 



Lateral inflorescence branches very difluse, 10-30- 



flowered 8. B. yarviflora. 



Lateral inflorescence branches more or less rigid, 



few-flowered 9. B. procu77ibens. 



Berries usually ribbed ; calyx strigose-pubescent. 



Plant subherbaceous (ex descr.) 10. B. palustris. 



Plant a shrub 



Leaves lanceolate, narrow, lengthily acuminate 



11. B. angustifolia. 

 Leaves mostly ovate or broadly elliptical, not 



lengthily acuminate 12. B. guianensis. 



powers not exceeding 8 mm. Bracteoles subfoliaceous, 



much exceeding the calyx. (Madagascar.) 13. B. longithyrsa. 

 Flowers 7 mm.-l cm. or more long. Bracteoles not con- 

 spicuous. (Mascarene Islands.) 

 Branchlets and inflorescence axes clothed with dense 



ferruginous hairs 14. B.fera. 



Branchlets and inflorescence axes glabrate or silky pubescent. 

 Lateral branches of inflorescence long, much branched, 

 often sinuous, 10- or more flowered. 



Stipules less than 1 cm. long 15. B. horhonica. 



Stipules 2-5-3 cm. long IQ. B. bistijpulata. 



Lateral branches of inflorescence short, rigid, little 



branched, 2-6-flowered 17. B. Zaluzania. 



Inflorescence with a long main rachis, narrow cylindrical in 

 contour, the lateral cymose branches relatively short, but 

 the flowers not crowded. Bracteoles nearly or quite equal- 

 ling the fruit 18. B. hracteolata. 



Inflorescence spicate or subspicate, the lateral cymes being sessile 

 or almost so ; the flowers in each more or less densely 

 crowded. (Spicate.) 

 Stipules 2-3 cm. long. 



Shoots pilose hispid, with outstanding ferruginous hairs 



19. B. lahiata. 

 Shoots glabrate, or appressedly pubescent. 



Corolla-tube less than, rarely as much as, or slightly 

 exceeding 1 cm. long. 

 Branchlets sericeo-pubescent, corolla pubescent externally. 

 Lateral cymes pedicellate, sometimes ample 



20. B. racemosa. 



