68 ILLUSTRATIONS OF 



From the above enumeration B. Jamesoni has been excluded, 

 because it differs in its characters, in the number of divisions of 

 its calyx, in the shape of its corolla, the form and position of its 

 stamens, and the structure of its stigma. 



Streptosolen. 



I have already alluded to the propriety of excluding from 

 Browallia the species described under the name of B. Jamesoniy 

 as it possesses many essential characters at variance with that 

 genus. All the species of Browallia are herbaceous, while the 

 plant above-mentioned is suffruticose, forming a branching shrub 

 4 or 6 feet high, with very rugous, coriaceous and scabrid leaves ; 

 the inflorescence is also more corymbose, and the structure of 

 the flower differs from that of Browallia in the following parti- 

 culars. The calycine tube is crowned with four, rarely with five 

 teeth ; the corolla is not hypocrateriform, and its tube, instead of 

 being slender and cylindrical, swells into a funnel-shape, imme- 

 diately as it emerges from the calyx, and the contracted basal 

 portion soon twists half a revokition, so that the border becomes 

 actually resupinate; owing to the want of the contraction in the 

 throat, the border does not assume the figure of a rotate 5-lobed 

 plane, but enlarges more in a campanular form with five short 

 rounded lobes, the front lobe being broadest; it is however often 

 4-lobed by the confluence of the two upper smaller segments; 

 the two lower stamens are not short, dilated, hemicyclical, and 

 fixed in a ventricose swelUng below the throat, but are here 

 straight, slender and filiform, originating in the contracted base 

 of the funnel-shaped tube and opposite the broader lobe of the 

 border; the two upper filaments are also straight and nearly 

 erect, although they are fixed in the mouth of the campanulate 

 border, with one of the lobes of each anther almost abortive or 

 dwarfish, as in Browallia ; all the filaments are terete, not greatly 

 dilated, and although at first hairy, they become at last quite 

 glabrous. The style resembles that of Browallia in being swollen 

 at its summit, where it is hollow and corrugated into numerous 

 transverse folds ; but the stigma is of an essentially different form, 

 being suddenly expanded into two broad, compressed, auriculate, 

 equal lobes, at first connivent, afterwards ringent, with a large 

 opening in the sinus into the tubular summit of the style (and 

 which in the living state is probably filled with mucous matter), 

 thus approaching more to the form of the stigma of Petunia. 

 The whole plant possesses much the habit of Stemodia suffruti- 

 cosa, vnth which genus and with Pterostigma there exists some 

 analogy in the form of the stamens and stigma. It will however 

 constitute a genus belonging to the tribe Petuniete, connecting 

 this group still more closely with the Salpiglossidece bv Browallia. 



