cix. ACANTHACEJ5. (C. B. Clarke.) 389 



i * ca f . tlle - Corolla-tube short ; upper lip obsolete, lower 



3-lobed. Ovules 2 in each cell. Retinacula curved, hardened. 



Anterior filaments with an excurrent process .... 20. BLEPHAEIS 

 Anterior -foments without an excurreut process ... 21. ACANTHUS.' 



Tribe $. Justicieae. Corolla-lobes imbricate in bud. Retinacula curved, 

 hardened. ^,~ Anthers 2-1-celled; cells often spurred at the base, one fre- 

 quently placed much above the other. Style shortly equally 2-fid or 

 subentire. 



Subtribe 1. ANDBOGIIAPHIDE^;. Ovules 3-10 in each cell. Capsule 

 normally 6- or more- seeded. 



* Capsule compressed at right angles to the septum; seeds ovoid, hardly 

 compressed. 



Flowers panicled or thyrsoid ......... 28, ANDEOGEAPHIS. 5**t 



Flowers axillary, clustered, with cladodes (suppressed 



branchlets) among them ......... . 29. HAPLANTHUS. 



* Capsule subterete, seeds much compressed. 



Corolla-tube very slender, limb small ....... 30. GYMNOSTACHYTJM. 



Corolla cylindric, curved, not ventricose nor deeply 



2-lipped ................ .31. PHLOGACANTHUS. 



Corolla ventricose, not deeply 2-lipped ...... 32. CYSTACANTHTJS. 



Corolla deeply 2-lipped ........... 33. DIOTACANTHUS. j"/g 



Subtribe 2. BARLERIE^:. Ovules 2-1 in each cell. Corolla-lobes 5, sub- 

 equal. Stamens 4, of which 2 are small or obsolete, or 4 1 -celled. 



Sepals 4, 2 outer opposite larger. Anthers 2-celled ... . 22. BABLEEIA. 

 Calyx 2-lipped, 5-lobed. Anthers 2-celled ..... 23, NETTHACANTHUS. 

 Outer calyx-lobes much the larger. Anthers 1-celled . 24. CBOSSANDEA. 



Subtribe 3. ASYSTASIE^E. Ovules 2 in each cell. Corolla-lobes 5, sub- 

 equal. Sepals 5, small, subequai. Stamens 4 or 2 ; anther-cells 2, subequal, 

 parallel, muticous. 



Corolla-tube long, narrow or subventricose. Stamens 4 25. ASYSTASIA. 

 Corolla-tube slender. Stamens 2 ........ 26. EKANTHEMUM. 



Corolla-tube ventricose. Stamens 2 ....... 27. CODONAGANTHUS. 



Subtribe 4. ETJJUSTICIE^;. Ovules 2 in each cell. Corolla distinctly 

 2-lipped. 



* Stamens 4, anthers all subequal 2-celled. 



Calyx deeply 5- or 4-lobed .......... 34. LEPIDAGATHIS. 



Calyx campanulate, 5-toothed ......... 35. PHIALACANTHUS. 



** Stamens 2, anthers 1-celled. 



Bracts small, narrow. Corolla small ....... 36. MONOTHECITTM. 



Bracts small, narrow. Corolla long ....... 37. CLINACANTHUS. 



Bracts larger than the calyx-segments ...... 49. HYPCESTES. 



*** Stamens 2, anthers 2-cellect. 



f Placenta rising elastically from the base of the capsule. 



Bracts in 1 -sided spikes ........... 46 - 



Bracts clustered, shortly peduncled ....... 47. DICLIPTEEA. 



