244 THE JOURNAL OF BOTANY 



withdrawal within the flower by the recoihng filaments, it occupies 

 the site pi^eviously held by the anthers. 



The two anthers, set side by side, are pressed closely together 

 by the bowed and spring-like filaments. At the lower end of the 

 under-loculus is the horn, or trigger, which, when struck, prompts 

 the discharge of pollen upon the back of a visiting insect. There 

 are a few hairs upon the posterior surface of the anthers, but 

 there are none upon the anterior face, the pollen is thus shot 

 forth in an uninterrupted course. 



The stigma, magnified thirty times, is seen to consist of two egg- 

 shaped lobes set antero-posteriorly in the cupule-like termination 

 of the style. The tube occupied by the style appears as a ridge 

 upon the external face of the posterior corolla-wall. 



Thdnbergia Eandii S. Moore (no. 1381). A primrose-coloured 

 flower, the tube of a brighter yellow within, shade-seeking and 

 fading in a day. The two bracts cohere slightly posteriorly, the 

 flower emerging in front. Andrcecium and gynoecium are placed 

 deeply within the corolla-tube. As to the four didynamous 

 stamens : each bears bearded anthers, whose loculi dehisce along 

 the ventral face, after the manner of a pea-pod. The connective 

 is prolonged above into a short horn. The anthers swing easily 

 upon the tips of the filaments, as if loosely jointed. In the two 

 long stamens, long hairs line the edges of the valves of dehiscence 

 in the outer anther-loculi ; the inner loculi have a tuft of hairs at 

 their lower ends only. In the two short stamens there are but a 

 few short hairs lining the valves of both inner and outer loculi ; 

 the long ones are congregated in tufts at their lower ends. Partly 

 concealed by the hairs of the beard, each loculus bears at its lower 

 extremity a tusk-like process, sometimes a pair, each tusk having 

 at its end two sharp spikes, which project like the " horns " of a 

 snail. A magnification of thirty diameters brings out this last 

 feature more clearly. 



The long stamens, anterior in their origin, are bowed outwards, 

 and their anthers clasp the style just beneath the stigma. The 

 filaments of the short stamens are nearly straight, their anthers 

 flank the style, and are ranged immediately below the pair per- 

 taining to the long stamens. All the filaments carry a tuft of 

 hairs at their points of origin from the corolla. Dehiscence is 

 early, and takes place before the flower opens. The sharp pro- 

 cesses with which the loculi are armed very probably stick into 

 the bodies of visiting insects, ensuring a good shaking of the 

 anthers as the insect frees itself from their snare. 



The corolla-tube is pinched up along the middle line posteriorly. 

 Viewed from the outside this constitvites a low ridge in the length 

 of the tube ; seen from the inside it appears as a recessed portion 

 of the tube. In this recess, style and stigma lie. Compai-e the 

 tubal recess in Justicia 'protracta, above. 



The stigma is elaborate. The anterior or lower lip, spreading 

 horizontally forwards, resembles the splash-bowl of a drinking- 

 fountain. The posterior or upper lip is erect, with a lower 

 narrowed portion, whose edges are folded in in front, almost 



