XCVIII. ACANTHACEiE (bURKILL AND CLARKE). 



Sect. i. Monotheciece. — Anthers 1 -celled. The flower not 

 appearing as though enclosed between 2 opposite bracts. 

 Placentai not rising eiastiCtilly from the base of the 

 capsule. 

 Corolla more than 1 in. long ; tube broad, cylindric . 39. Ruttya. 

 Corolla small or slender. 



Corolla-tube cylindric 40. Monothecium. 



Corolla-tube very short 41. Okeacanthus. 



Corolla-tube linear, §-1^ in. long . . . .42. Brachystephanlj 

 Sect. ii. %)icoB.— Anthers 2-celled. The flower not 

 appearing as though encloaed between 2 opposite 

 bracts. Placentai uut rising elastically from the base 

 of the capsule. 

 One aniher cell below the other, distinctly tailed. 



Capsule usually 4-?eeded ; sfeeds rough or tubercled 



(see 56. liumjla) 43. Justicia. 



Capsule 2 -seeded ; seeds smooth, shining, rarely with 



minute scabrous or stiff hairs . . . .44. Monechma. 

 One anther-cell somewhat below the other, at base 

 ^ rounded ormucronate (or hardly tailed in Adhatoda). 

 Corolla large, or long. 



Corolla- lube broad. Large-leaved shrubs . . 45. Adhatoda. 

 Corolla-tube long linear ; posticous lip small . . 46. Khinacanthus. 

 Corolla-tube short ; lips very long (see 57. Macro- 



rungia) .47. Anisotes. 



Corolla slender. Panicle many-flowered, rather close. 

 Floral leaves inconspicuous. Pollen globobe, flattened, 



with 2 stopples 48. Tsoglossa. 



Floral leaves (at least in the type species) conspicuous. 



Pollen globose with 6 eiiuatorial stopples . . 49. Chlamydocardia. 

 Anther-cells at equal height, rounded at the base, 

 liracts or floral leaves broad. Capsule 2-seeded 



Bracts strobilate, with only 1 flower under each . 50. Ecbolium. 

 Floral leaves axillary or shortly spicate with 3-1 



ebracteate flowers under each . . . .51. Megalochlamys. 

 Bracts narrow or sn)all. Capsule 4-seeded. 



Corolla large ; tube i in. long . . . .52. Graptophyllum. 

 Corolla slender ; tube ^ in. long . . . .53. Schauekia. 

 Sect. iii. Hypoestece. — Placentae not rising elastically in 

 fruit. The flower appearing as ttiough enclosed between 

 two obloug opposite bracts (sometimes connate into a 

 tube). 

 Anther-cells 2, 1 much above the other (see 58. Dicliptera) 54. Peristrophe. 

 Anthers 1 -celled i)5. Hypoestes 



Sect. iv. ^olutce. — Placentae rising elastically in fruit, 

 separating from the capsule- valves at the base, and 

 throwing out the seeds. Capsule ovoid, flattened ; 

 faces wiih firm raised margins. 

 Spikes strobilate with 1 flower under each broad bract. 

 CoroUa-iips not longer than tube. (Only differs from 

 Justicia sect. Betonica, or Adhatoda, by the 



elabtically rising placentae 56. Rlnoia, 



Corolla-lips much longer than tube. (Only differs from 



Anisotes by the elastically rising placentie) . 57. Macrohungia. 

 Spikelets with 1 perfect flower enclosed by 2 opposite 

 bracts. (Only diflers from Peristrophe by the elasti- 

 cally rising placentae) 58. Dicliptera. 



Of doubtful position 59. Hierkia, 



