46 ILLrSTRATIONS OP 



vinced 



grandiflora and S. viridijl 



these carefully^ we cannot fail to arrive at the conviction, that 

 these two species must be held to he generically distinct. In 

 the former instance^ the calyx has the shape of a large and cylin- 

 di'ical tube, irregularly cleft in the mouth into three unequal 

 rather short teeth; it does not increase in size, but, in consequence 

 of the growth of the fruit, splits on one side, by a longitudinal 

 fissure, to the base; in S. viridifiora^ on the contrary, the calyx 

 consists of jQve, very distinct^ lanceolate divisions, all free to the 

 base, which at first are slightly connivent by their somewhat 

 thickened margins, but which are easily, and soon become, sepa- 



rated into distinct sepals. 



diil\ 



\ 



much larger, more campanulate, of thicker consistence, of a yel- 

 lowish colour, with deep red nervures^ and with a border of five 

 large rounded lobes, remarkably crenated or fimbriated on their 

 margin, and these are considerably imbricated in aestivation, one 

 lobe being quite interior, and another altogether exterior : the 

 stamens are also very glabrous. On the contrary, in S. viridiflora, 

 the corolla, of a greenish lurid white, is deeply divided (half-way 

 down) into five equal, revolute, lanceolate, acuminated and entire 

 segments, which are quite valvate in aestivation, and connivent 

 by then- somewhat inflected tomentose margins : the stamens are 

 swollen and very sericeously pilose at their base; in drying, both 

 calyx and corolla become black, which does not occur in the true 

 species of Solandra : in the latter genus the flowers are always 

 terminal^ whereas in S. viridiflora they are solitary and axillary, 

 or at least grow out of several nearly terminal axillary fascicles 

 of leaves : there are some other tninor points of difierence that 

 will be traced in the details of the characters described. From 

 these facts it will be seen that the new genus, of which the So- 

 landra viridiflora may be considered the type^ must be referred 

 to the true Solanacecs, and that it will belong to the Jaboroseee, 

 serving to connect that tribe with the lochrome^e, and closely 

 allied to Salpichroma and Nedouma. I have called it Dysso- 

 chroma^ from hvaaoo^^ ep^^, and;;^c3/^aj color , on account of the 

 lurid sickly green colour of its large flowers, which become black 

 as they wither, or lose their moisture in drying, a character com- 

 mon to all the Jaborose(B. I have not been able to examine the 

 embryo of this genus, but we may expect it will prove very diff^er- 

 ent in form from that of Solandra. The following may be consi- 

 dered as its generic character : — 



Dyssochroma, gen. no\.— Calyx magnus, 5-sepalus, persistens ; 

 sepala lanceolata^ acuminatissima, primum marginibus in tu- 

 bum 5-angulatum conniventibus, semicylindrica, demum li- 



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