12 Mr. J. Miers on the Solanacese. 



niitted) ; but it appears to me far better to class the three species 

 euumerated by M. Dunal as a mere section either of Hyoscymnus 

 or of Physochlcena, as I suggested [hvj. op. v. 473). 



In regard to Physochkena, many reasons have been oflPered 

 [huj. op. V. 469) to show why it must be considered as a distinct 

 genus : it cannot belong to Scopolia, its affinity being much 

 sti-onger towards Hynscyamus, especially the section last men- 

 tioned, on account of the character of its inflorescence, its tubular 

 calyx, and its shorter and more campanulate corolla. 



Aiiisodus, however, is so extremely different in all its characters, 

 that it offers still less reason for being retained in Scopolia. The 

 latter has a membranaceous urceolate calyx, one-third or one- 

 fourth the length of the corolla, which is tubular or slightly 

 funnel-shaped, thin in texture, with a border of five very short 

 lobes, slightly imbricated in aestivation. In Avisoclus, on the 

 contrary, the calyx is extremely thick and fleshy in texture, 

 broad, tubular, and somewhat ventricose, with ten thick, promi- 

 nent nervures, and five obtuse teeth : this does not much enlarge, 

 but it grows thick and rigid, assumes a very reticulated or can- 

 cellated appearance, and encloses the large oval berr}^, when its 

 ten prominent thick nervures become ligneous ; the corolla does 

 not much exceed the calyx in length, is thick and fleshy in sub- 

 stance, broadly campanulate, with a border of five large rounded 

 lobes, which overlap one another at base, and are deeply imbri- 

 cated in ?estivation, one lobe being larger and more interior than 

 the others. In Scopolia the testa is tubei-culosely rugous, in 

 Anisodus it is smooth and slightly punctulated : in the former 

 genus the stigma is capitate and obsoletely 2-lobed, the external 

 surface being covered with short articulated hairs or papillae ; in 

 the latter genus it is somewhat compressed and distinctly bi- 

 lobed, with a simply rugous stigmatic surface : in Scopolia, the 

 corolla is quite glabrous on both sides, as are also the filaments ; 

 in Anisodus, the inner sui'face is quite woolly, and the filaments 

 are pubescent when in bud ; in the former the fruit is quite cap- 

 sular, thin in texture, 5-grooved with a torulose surface ; its oper- 

 culum is simple, soon falls off", and its seeds are affixed on an in- 

 conspicuous adnate placenta, attached to the dissepiment ; in the 

 latter genus the fruit is oval, smooth and thick, with a fleshy 

 epicarp that hardens on the pericarp like an exsuccous berry, 

 and the operculum only manifests itself after the decay of the 

 dry fleshy covei'ing ; the seeds are aggregated upon a very large, 

 globose, cai-nose, favose placenta, adnate to the dissepiment, 

 and are half imbedded in its fleshy substance. In fine, there are 

 more manifest generic distinctions between Scopolia and Ani- 

 sodvji, than between Scopolia and Hyoscyumus. In my enume- 

 ration of the genera composing my tribe Hyoscynmea.' [hvj. op. 



