188 ESSAYS. 



which he seems to have invented a new (^) order. Moreover, 

 this is essentially identical with the " cochlear " aestivation 

 of the same work (not of Lindley) ; and Eichler, in his " Blii- 

 thendiagramme," adopts this name (unsuitable though it 

 be) for this particular arrangement, whatever be the position 

 of the inclosed or inclosing petal. A glance shows that this 

 supposed " true imbricate aestivation " is a slight and not very 

 uncommon deviation (by the displacement of what should be 

 the interior margin of one of the petals during growth) of the 

 mode II, variously termed obvolute, convolute, or contorted 

 aestivation. But it is so intermediate between this and the 

 quincuncially imbricate as perhaps to justify Brown in apply- 

 ing the name imbricate generically to all the overlapping 

 modes. I see, since the above was written, that Eichler, in 

 his " Bliithendiagramme," in effect does this. I find also, 

 that Eichler uniformly employs the term convolute, or con- 

 volutive, as I have done, instead of contorted. I should hope, 

 rather than immediately expect, that this use would become 

 general. 



