BOTANY OF TERRA AUSTRALIS. 33 



ill many Composita), especially Cinarocepliala). On tlic 

 contrary, in Goodenoviae the stigma at the same period is 

 hardly visible, and is certainly not then capable of reccivint^ 

 impregnation from the pollen of its proper flower ; it is 

 therefore either impregnated by the anthera3 of difFercMit 

 flowers, or in some cases at a more advanced stage by the 

 pollen of its ow^i antherac, which is received and detained in 

 the indusium. To these arguments for the exclusion of 

 Lobelia I may add that in the greater part of Goodenovise 

 with dehiscent fruit the dissepiment is parallel to the valves 

 of the capsule, in which respect they differ equally from 

 Lobelia and the valvular-fruited Campanulacca) ; and lastly, 

 that many species of Lobelia as well as Campanulaceae con- 

 tain a milky juice of which there is no instance in Goode- 

 noviae. If, therefore, in Lobelia the pencil surrounding 

 the stigma and the irregularity of the corolla, which, how- 

 ever, in some species is hardly perceptible, be considered as 

 characters sufficient to separate this extensive genus from 

 Campanulacese, it may form a separate order, admitting, 

 perhaps, of subdivision into several distinct genera. 



I have formerly observed^ that in two genera of Goodc- 

 novia3, namely, Eiif hales and Velleia, the base of the corolla 

 coheres with the ovarium while the calyx remains entirely 

 distinct. This structure I had stated as being jieculiar to 

 these genera, and as in some degree invalidating one of 

 Jussieu's arguments for considering the floral envelope of 

 Monocotyledones as calyx rather than corolla. The fact, 

 however, seems not to be admitted by Richard, who in the 

 dissertation already quoted^ describes what has hitherto been 

 called calyx in Velleia as bractese ; a view of the structure 

 which in those species of that genus having triphyllous calyx 

 may appear plausible, but of which the probability is ::.'n 

 diminished even in those with pentaphyllous calyx, and still 

 more in Euthales, where the calyx is also tubular. But a 

 stronger argument for the part usually denominated calyx 

 being in these genera really such may be derived from 

 certain species of Goodenia, in which it will be admitted 

 that both calyx and corolla are present, and where, though 



^ Frod.Jl. Nov. llvll. 5 SO. ' ylinialcs da „ius. JS, ;;. 27. 



3 



