ACAXTI1ACEJE. 



177 



Climbers : Medfl ii"t support r<l on hard retina- 

 cula ; ovules •! in each oell, collateral . 



Erect or p rostrate plants, not climbing: — 



Seeds not supported on retinacula; ovules 

 many, superposed in 12 rows in each cell :— 

 Calyx 1-partite. stamens 2. 



Braet> rigid, peduuclc of spike covered 

 with alternate scales .... 



Bracts herbaceous, spike sessile, or if 

 stalked the peduncle without scales. 

 Calyx 5-partite. stamens 4 ... 



Seeds supported on retinacula: — 



Upper lip of corolla subobsolete ; lower lip 

 large, expanded, 3-lobed ; ovules 2 in each 

 cell ....... 



Corolla 2-lipped or with 5 subequal lobes : — 

 Corolla lobes twisted to the left in bud :— 

 Ovules more than 2 in each cell, capsule 

 normally 6- or more— seeded : — 

 Corolla distinctly 2-lipped : — 

 Inflorescence spinose 

 Inflorescence not spinose 

 Corolla subequally 5-lobed : — 

 Bracteoles large ; capsule clavate, 



with a solid base . 

 Bracteoles small, narrow or none, 

 capsule seed-bearing through- 

 out : — 

 Flowers in sessile clusters which 

 are arranged on the branches of 

 a trichotomous or 1-sided 

 panicle 

 Flowers sessile, in terminal or 

 pseudo-axillary heads or 

 spikes ... 



Ovules 2 in each cell, capsule with 4 or 

 fewer seeds :— 

 Placentas separating elastically from 

 the base of the capsule ; stamens 

 4 : )>iacteole8 very large 

 Placentas remaining attached to the 

 base of the ripe capsule : — 

 Anthers minutely mucronate or 

 spurred at the ba.-e : stamens 

 four .... 



Anthers blunt at the base : — 

 Cor-tube slender, linear ; stamens 

 two .... 



Cor-tube widened from near the 

 base : stamens four 



1. TuUNBERQIA. 



2. TuBlFLOKA. 



3. Nelsonia. 



4. Stadrogyne. 



5. Blethabis. 



6- asteracantha. 

 7. Htgrophila. 



8. EUELLIA. 



9. iECHMANTHERA. 



10. Hemiqraphis. 



11. Petalidium. 



12. DlSCHORISTE. 



13. Djfdalacanthcs. 



14. Strobilanthes. 



