OF CENTRAL AFRICA. 269

The next genus of Crucifcrac to be noticed is Farsetla, a fragment of the original species of which is in the collec- tion. There are also several specimens of a j)lant, found in the desert, supposed to be new, and which, tliough with- out flowers, and considerably different in the form of its stigma, I am inclined, from the resemblance in habit, in pubescence, in sihcula, in seeds, and especially from the exact similarity in the structure of the septum, to refer to the same genus. ^

As the introduction of the structure of the dissepiment [-^7 into the generic characters of Crucifera) is now pi'oposed for the first time, and as I believe that its texture and ap- pearance should always be attended to in constituting genera in this family of plants, I shall here offer a few remarks respecting it.

According to the particular view which I briefly but distinctly published in ISIS, and which M. De Candolle first adopted in 1821, of the composition of the pistillum in Crucifera),^ the dissepiment in this family is necessarily

1 farsetia.

Favsclia. Turret, Furselia, p. 5. rarsetice sp. Ilorl. Keio. cd. 2, vol. -1, p. G9. Be Cancl Si/st. 2, p. 2SG.

Char. Gen. Caij/x claiisus, basi vix bisaccatus. FUamenia omnia eden- tula. Anthercc lincarcs. Silicula ovalis v. oblonga, scssilis, valvis planius- culis, loculis polyspermis (raro l-2-sperniis), funiculis liberis. Lissepimentum uiiincrve, vcnosum. Semina marginata. Coiijledones accumbentes.

llcrbae suffndicostc ramosce, pube bipartita appressa incance. Folia inte- cjcrrima. llacemi subspicati.

Obs. Dissepimentum in omnibus excmplaribus utriusquc speciei a nobis visis completum, sed in F. scgyptiaca quandoqiie basi feuestratum, fide D. Dcsfontaines. {Flor. Allant. 2, tab. ICO.)

F. regyptiaca species unica ccrta est, nam F. stylosa, cujus floras ignoti, ob stigmatis lobos patentes non absque haesitatione ad hoc genus rctuli.

Farsetia.? sti/losa, ramosissima, siliculis oblongis polyspermis passimqiic breve ovalibus 1-2-spermis, stylo diametrum transversum silicuLx subicquantc, stigmatis lobis patentibus.

Obs. Exemplaria omnia foliis dcstituta, sed illorum cicatrices ni fallor obvia3.

- In a work published in ISIO, the following passage, which has some re- lation to this subject, occurs : — Capsuias omnes pluriloeulares e totidem thccis confcrruminatas esse, divcrsas solum modis gradibiisque variis cohncsionis ct soiubilitatis partium judico." {Prodr. Flor. Kov. IIoll. 1, p. 538.) This opinion, however, respecting? the formation of multiloeular ovaria, might be held, with- out necessarily leading to the theory in question of the composition of tiic fruit iu Crucifcroc, which I first distinctly stated in an essay on Composilw, road

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