14 HOSACE.I':. 



D Syncarpium elliptical 



12. 11. dolichocephalus. 



Dn Syncarpium rounded 



+ Primary veins manifestly impressed 



above, elevate below 



13. R. eupldebopJiyllus. 



++ Primary veins not manifestly im- 

 pressed above 



14. R. piptopetalus. 



15. R. splicer ocephalus. 



16. R. linear ifoliolus HAY. 

 /9. Stem, branches, petioles and peduncles not glanduloso-barbate. 



Leaves glaucous velutinous on the lower surface 



D Leaflets smaller 1-2 cm. long 



17. R. triphyUus. R. parvifolius. 



Dn Lcancts longer usually 5 cm. long. 



^Eacemes terminal ...18. R. parvi-araliifolius. 

 ^^Cyrnes umbel-like axillary... ly. 7?. rarissimus. 

 Leaves not glaucous velutinons below. 

 D Leaves duplicately serrate 



^Branches and petioles villose 



20. R. tahvanianus. 



AA Branches and petioles not villose 



+ Leaves quasiverticillate at the base of 



the flowering branchlets 



21. R. parvipungens=R. liirsutopimgens. 

 ++ Leaves simply alternate 



*Leaves more densely glandular dotted, 

 carpels fewer than the following 



species 



22. R. ylanduloso-punctatus. 



Leaves scarcely glandular dotted. ... 

 23. R. parvirosaefolius. 



