630 Flora of the Malayan Peninsula. 



One anther-cell below the other, tailed . . . . 26. Justicia. 



One anther-cell somewhat below the other, its base 

 rounded or acute, scarcely tailed : — 



Corolla-tube broad. Shrub . . . . . . 27. Adhatoda. 



Corolla-tube linear ; posticous lip small, twisted . . 28. Rhinacanthus. 

 Anrher-cells at equal or nearly equal height, not tailed : — 

 Corolla -3 to •? in. long : — 



Spikes, racemes, or panicles terminal . . . . 29. Leda. 



Cymes small, axillary . . . . . . 30. Poltteema. 



Corolla 1-25 in. long : — 



Corolla green-blue . . , . . . . . 31. Ecbolium. 



Corolla red . . . . . . . . 32. Geaptophyllum. 



Sect. 3. HiPOESTEa:. Flower appearing as though en- 

 closed between two bracts. Placentae in fruit not rising 

 elastically : — 



Anther-cells 2, one placed higher . . . . 33. Peeisteophe. 



Anthers 1-celled . . . . . . . . 34. Hypoestes. 



Sect. 4. Solute. Placentfe rising in fruit elastically from 

 the base of the capsule, and throwing out the seeds :■ — 



Flowers in spikes, with prominent bracts . . . . 35. Rungia. 



1. Thunbeegia, Linn. f. 

 [Character narrowed, as throughout AcanthacecB, to the Malay Penin- 

 sula species.] 



Twiners. Leaves petioled, opposite, subequal, undivided, often 

 toothed or lobed. Peduncles solitary, axillary, running into terminal 

 racemes, i. e. the upper floral leaves (or bracts) greatly reduced, incon- 

 spicuous or obsolete. Bracteoles (prophyUa) large, often -5 in. long, 

 broad-oblong from a truncate base. Calyx of 8 to 14 small lanceolate 

 teeth, or obsolete (appears a mere rim). Corolla large; tube cylindric 

 or campanulate ; limb of 5 subequal lobes, contorted in the bud. 

 Stamens 4, subsimilar ; anther-cells 2, parallel, sometimes strongly 

 spm'red at the base; pollen large (50 to 60 /a in diam.), globose, smooth, 

 with faint spiral bands or strongly spinous. Ovary 2-celled, with 2 

 ovules in each cell ; stigma of 2 equal, opposite, triangular lobes. Cap- 

 sule globose, with a long oblong-linear beak ; seeds 4, or by suppression 

 3 to 2, hemispheric, excavate on the plane face, wrinkled on the spheric 

 face ; sessile, not held aloft on retinacula.— Distrib. Species 100, in the 

 warm parts of the Old World ; most numerous in Africa, extending to 

 Australia. 



Sect. 1. Calyx a mere rim. Anther-cells spurred. Pollen 

 smooth : — 



Leaves broad-oblong, entire or slightly toothed .. .. 1. T. lavrifolia. 



Leaves round-ovate, toothed or often lobed . . . . 2. T. grandijiora. 



