oil. ACANTHACB^. (C. B. Clarke.) 389 



Tribe 4 Acantheae. Corolla-tuhe short ; upper lip obsolete, lower 

 3-lobed. Ovules 2 m each cell. Setinacula curved, hardened. 



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

 Anterior filaments without an excurrent process ... 21. AcANTHTTS. 



Tribe 5. Justicieae. Coj-oZ/a-ZoJe^ imbricate in bud. Betinaoula ouiYei, 

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

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

 snbentire. 



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

 normally 6- or more-seeded. 



* Capsule compressed at right angles to the septvm ; seeds ovoid, ha/rdly 

 compressed. 



Plowers panicled or thyrsoid 28. AuDEoaEAPHlS. 



flowers axillary, clustered, with cladodea (suppressed 

 branchlets) among them 29; Haplanthus. 



** Capsule suhterete, seeds rmich compressed. 



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



Corolla cyliudric, curved, not ventricose nor deeply 



2-lipped'. .31. Phlooacanthus. 



Corolla ventricose, not deeply 2-Iipped 93. CTSTAOAifTHtrs. 



Corolla deeply 2.1ipped 33i. Diotacanthtts. 



Subtribe 2. Baiileeie.«]. Ovules 2-1 in each cell. Gorolla-lohes 5, sub- 

 equal. Stamiens 4, of which 2 are small or obsolete, or 4 1-oelled. 



Sepals 4, 2 outer opposite larger. Anthers 2-celled ., . 22. Bablebia. I^> Vf ^^ 



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



Outer calyx-lobes much the larger. Anthers l-celled . 24. Cbossandea. 



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

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

 parallel, muticous. 



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



Corolla-tube slender. Stamens 2 26. Eranthbmum. 



Corolla-tube ventricose. Stamens 2 27. CoDONACANTHtrs. 



Subtribe 4. BujTJSTiciEa;. 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 l-celled. 



Bracts small, narrow. Corolla small 36. Monotheciitm:. 



Bracts small, narrow. Corolla long 37. Clinacanthus. 



Bracts larger than the calyx-segments 49. HXPCESTES. 



*** Stamens 2, anthers 2-celled. 



f PlacentcB rising elastically from the base of the capsule. 



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



Bracts clustered, shortly peduncled 47. DIolipteea. 



