140. ACANTHACEAE. I9I. 



5. Surface of pollen grains honeycombed. Ovules 3 or more in 



each cell. Capsule usually more than 4 seeded. 



2 RUELLIA. 

 Pollen grains longitudinally ribbed. Ovules 2 in each cell. 

 Capsule with 4 or fewer seeds. 3 DYSCHORISTE. 



6. Corolla 1 lipped, tube short. 7. 

 Corolla 2 lipped or subequally 5 lobed. 9. 



7. Calyx 4 partite to the base. Corolla wanting posticous. lip. 



6 BLEPHARIS. 



Calyx 5 partite to the base. Corolla split down posticous face 



so that lip has 5 lobes all on one side. 8. 



8. Sepals all similar, posticous 1 nerved. 7 SCLEROCHITON. 

 Posticous sepal broader, 2 nerved, often 2 toothed. 



8 CROSS AND R A. 



9. Stamens 4, all fertile. 10. 

 Stamens 2 fertile. 11. 



10. Flowers in dense compound heads. Ovules 3 in each cell. 



9 CRABBEA. 

 Flowers in racemes, spikes or heads. Ovules 2 in each cell. 

 Capsule long stalked. 10 ASYSTASIA. 



11. Corolla with 5 lobes, not very unequal. I2. 

 Corolla 2 lipped. 13. 



12. Calyx segments 5 sub-equal. Corolla curved. 11 MACKAYA. 

 Calyx large. 4 partite to base ; 2 lateral segments narrower. 



12 BARLERIA. 



13. Pollen reticulated. Seeds with hj^groscopic hairs. 



12 BARLERIA. 



Pollen banded, never reticulated. Seeds without hygroscopic 



hairs. l4- 



14. Anthers 1 celled. 15. 

 Anthers 2 celled. 16. 



15. Staminodes 2. 13 RUTTY A. 



Staminodes none. 2 bracts to the flower. 21 HYPOESTES. 



16. Lower anther cells tailed (except in Justicia campylostemon). 



Pollen grains with rows of tubercles. 17. 



Lower anther cells not tailed or very slightly tailed in Adhatoda 



which has no rows of tubercles on the pollen. 19. 



17. Corolla tube slender, much longer than the limb. 



16 SIPHONOGLOSSA. 

 Corolla tube not much longer than the limb. 18. 



18. Seeds usually 4 to the capsule, rough or tubercled. 



14 JUSTICIA. 

 Seeds 2 to the capsule, smooth, usually shining. 



15 MONECHMA 



19. Anther cells at equal heights or one a very little below. 2O. 



One anther cell completely below the other. 2I. 



