APPENDIX, 53 



the other genera, by reason of the imbricate sestivation of the 

 corolla, were placed by me in Atropace^^ but the Nicotianece 

 were kept as a tribe, distinct from the PetunietSj because of the 

 peculiar mode of aestivation of the corolla, of which diagrams 

 were given in explanation {huj. op. i. p. 173). The genus Lep- 

 tophragma (Prodr. xiii. 578), founded on the Salpighssis pro- 

 strata^ Hook. & Am., will not be found to be valid. In March 

 1846, I first hinted at the possibility that Callibrachoa would 

 not be found to be distinct from Petunia^ on which Mr. Bcntham 

 immediately suggested that both Callibrachoa procumhens and 

 Salpighssis prosb^ata would in all likelihood prove to be iden- 

 tical with my Petunia anomala (see note April 1846, Lond. Journ. 

 Bot. V. 190). It will be seen from another note published in 

 Feb. 1848 {huj. op, vol. i. p. 114), that having met with 

 an opportunity of examining specimens of the two first-men- 

 tioned plants, I had found them to differ in no respect from 

 Petunia parvifloray of which I have given a drawing, with ample 

 analytical details, in plate 23. of the volume referred to : I showed 

 also that it is identical with th.^ Lindernia MontevidensiSj Spr. The 

 genus LeptopJiragma^ now first established by M. Dunal upon a 

 letter from Mr. Bentham of an old date, cannot therefore be re- 

 tained, and Leptophragma prostrata, Bcnth., can only be consi- 

 dered as another synonym of Petunia parvifloraj Juss., a plant 

 that appears to have a widely extended range over the American 



hemisphere, 



I have already offered several observations on the genus Retzia 

 {huj, op. i. p. 181), with which M. DeCandolle, on the authority 

 of M. Dunal, classes Lonchosfoma, Wikstr. To this I cannot 

 accede, for neither the habit of the plant, nor the structure of 

 the flower, bears any analogy towards the Solanacea. ^ On some 

 future occasion I will furnish the results of my analysis of these 

 two genera, when I will offer a few additional remarks on the 



subject. 1' 



M. Dunal, in his subtrlbe Fabianea, has in an equal degree 

 overlooked the character of sestivation, which is one of the most 

 important and constant features of the genera of the Solanal 

 alliance. This subtribe is made to consist of Nierembergia, 

 Bouchetia and Fabiana. The latter genus only I consider to 

 belong to Solanace^y on account of the valvate aestivation of its 

 corolla. Of Nierembergia I have given several illustrations and 

 copious analytical details, where the peculiar character of its 

 sestivation has been fully shown. The genus Bouchetia^ DC, 

 now first published by M. Dunal, does not appear from the cha- 

 racters described (Prodr. 589) to differ in any respect from Nie- 

 rembergia, and especially from N. linifolia and anomala, which 

 are figured in plate 20 of this work, and where the tube 



