79. ACANTRACEJk 



II . Calyx distinct, 4-5-partite. Corolla aubregular 

 or two-lipped. 

 A. Petals twisted in bud. Anthers with 2 cells 



parallel, level, or one only a little above the 



other (Tribe Ruellise). 



1. Ovules 2 in each cell. Corolla not distinctlj 



lipped 

 Cor.-tnbe long slender. St. 2.' Antha. 



mnticous ... * ... 2. Dcedalacanthus 

 Cor. tubular ventricose. St. 2 or 4. Antha. 



mnticous 3. Strobilanthes. 



St. 4. Anthers distinctly spurred. Fls. large 



white 4. Petalidiur*. 



2. Ovules 3-12 in each cell. 



Cor. not distinctly lipped. Bract 0. 

 Bracteoles large leafy • 5. Ruellia. 



Cor. not distinctly lipped. Bracts large. 

 Brateoles 6. Hemigmp hit. 



Cor. distinctly 2-lipped. Herbs with narrow 



7. Hygrophila. 



B. Petals imbricate in bud. Antha. with 1 

 or 2 cells. When 2-celled, one cell often 

 placed considerably above the other (Tribe 

 Justicieae). 



1. Ovules 2 in each cell Corolla not distinctly, 



or rarely, lipped. Sepals 4, the two outer 

 much the larger. 



Fla. yellow or blue. Anths. 2-celled ... 8. Barleria. 

 Fls, orange. Anths. lacelled .... 9. Crossandra. 



2. Ovules 2 in each cell. C^olla distinctly 

 2-hpped. 



a. Stamens 4. 



Upper anthers with only one cell perfect. Fls. 



blue . . . • 10. Neuracanthus. 



nthers all2-celled. Fls. usually white or purple. 11. Lepidagathis. 



b. Stamens 2. 



i. Corolla large 1|" white. Stout ffomh . 12. Adhatoda. 



ii. Corolla under 1\'' or with very slender tube. 



t Lower anther-cell with a white spur. 



Spur minute. Spikes terete or 2-1- ranked . 13- Jv.sticia. 



Spur very evident* Spikes ahort unilateral . 14. Rungia 



tt Anthers mutioous. 



446 



