770 



Flora of the Malayan Peninsula. 



explanate, campanulate, with a very short tube, distinctly 2-lipped or 

 nearly regular; lobes equal, oblong or unequal, blunt. Stamens 

 2, fertile ; filaments thick, short ; anthers large, 2-celled, connivent by 

 the tips. Disk none. Ovary sessile ; style longer than the stamens, 

 stout ; stigma small, capitate. Capsule straight, narrow, slender, not 

 twisted, splitting longitudinally. Distbib. — Species about 20. Siam- 

 Malaya. 



Corolla-tube, campanulate : — Sect. I. Campanulate : — 

 Corolla -5 in. long : — 

 Flowers many in large spreading panicles ; leaves sparingly 

 hispid, opposite . . . . . . . . 1. P. cordata. 



Flowers solitary or few on slender peduncles : — 

 Peduncles subterminal ; leaves opposite, ovate : — 



Leaves hairy on margins and on midrib and nerves 



beneath ; peduncles 1-flowered . . . . 2. P. campanulata. 



Leaves quite glabrous ; peduncles branched dichoto- 



mously, branches 1-flowered . . . . . . 3. P. Scortechinii. 



Peduncles axillary ; leaves crowded at apex of stem, 



lanceolate . . . . . . . . . . 4. P. ccenilea. 



Corolla under -5 in. long ; flowers few, crowded . . 5. P. pyroliflora. 



Corolla-tube not campanulate, very short : — Sect. II. Beevifloe^ : — 

 Corolla-lobes equal or subequal, if slightly 2-labiate the 

 lower lip hardly longer than the upper : — 

 Flowers in compact umbels or cymes on pedicels -5 in. 

 long or less at the apex of the peduncles: — 

 Leaves not purple beneath, in a basal rosette ; stem : — 

 Flowers umbellate, pedicels '5 in. long ; leaves ochre- 

 yellow beneath . . . . . . . . 6. 



Flowers in compact scorpioid cymes ; leaves pale 

 beneath . . . . . . . . 7. 



Leaves purple beneath, crowded at the apex of a short 

 stem ; flowers umbellate, pedicels '25 in. long . . 8. 



Flowers at the apex of slender cyme-branches 1 to 3 in. 

 long :— 



Leaves ochreous-tomentose beneath in a basal rosette; 

 stem . . . . . . . . . . 9. 



Leaves red-woolly beneath ; stem 2 in, long • • . . 10. 



Corolla lobes distinctly unequal, these of lower lip 

 longer than those of upper : — 

 Calyx-lobes lanceolate ; leaves obovate, coarsely toothed, 

 dull green ; corolla '25 in. across . . . . . . 11. P. laxa. 



Calyx-lobes oblong or linear oblong obtuse : — 



Leaves oblong-elliptic, sparsely hairy ; corolla '5 in. 



across • • . . . . . . . . 12. P. Curtisii. 



Leaves obovate, arachnoid on both aides, yellowish 



beneath : corolla '25 in. across . . . . . . 13. P. obovata. 



P. capitata. 

 P. ferruginea. 

 P. regularis. 



P. polita. 

 P. vulpina. 



