MR HIERN, ON EBENACE^E. 



79 



ROYENA. 



KET TO THE SPECIES. 



Flowers 5 7-, usually 5-, merous. Fruit not glandular or rarely so. 

 Calyx 5-lobed only at the apex. 

 Calyx divided half way down or deeper. 



Leaves cordate or sub-cordate or rarely rounded at base. 



Style 2-lobed. Leaves subsessile. 



Leaves smooth. Flowers hermaphrodite. 



Leaves scabrous. Flowers with rudimentary ovary. 

 Style 4 5-lobed. Leaves distinctly petiolate. 



Leaves narrowed at base, not cordate. 



1. R. htcida. 



2. R. cordata. 



3. R. scabrida. 



4. R. villosa. 



Peduncles short, not or scarcely longer than the flowers. 



Leaves subsessile. Anthers 10, hirsute. 5. R. hirsute. 



Leaves sessile. Anthers 14, glabrous. 6. R. sessilifolia. 



Peduncles nearly as long as the leaves or much longer than the flowers. 



Flowers solitary. 



Calyx patent or reflexed in fruit. 

 Leaves more than ^ in. long. 



Flowers hermaphrodite, 5-, rarely 4-, merous. 7. R. pattens. 

 Flowers polygamous, 5 7-merous. 8. R. ambigua. 



Leaves under ^ in. long. 9. R. nitens. 



Calyx appressed to fruit. 10. R. cistoides. 



Flowers in 1 5-flowered cymes. 



Leaves narrowly elliptical, - 1 in. long. 

 Leaves obovate, 2 6 in. long. 



Flowers tetramerous or rarely pentamerous. Fruit glandular. 



11. R. glabra. 



12. R. parviflora. 



18. R. glandulosa. 



