COROLLA AND CALYX. 201 



acute and candid friend. Two species of a new genus*, 

 found by Mr. Menzies on the West coast of North 

 America, have beautiful liliaceous flowers like an Aga- 

 panthus, with three internal petals besides ! Tulbaghia 

 is a similar instance. I must however protest against 

 the idea of the Corolla originating exclusively from 

 the inner bark, as well as of the cuticle not being con- 

 tinued over it, for reasons sufficiently apparent from 

 the former part of this work. 



It is a Linnoean rule that the Stamens should be op- 

 posite to the segments of the Calyx, and alternate with 

 the parts of the Corolla. Its author nevertheless seems 

 of opinion that no absolute means of distinction be- 

 tween these two parts can be pointed out, except 

 colour ; of the insufficiency of which he is aware. If 

 however the Corolla performs functions with respect 

 to light which the Calyx does not, and those functions 

 are indicated by its colour, a distinction founded on 

 such a principle is both correct and philosophical. We 

 must then conclude that in most liliaceous plants, not 

 in all, the two organs are united into one, and indeed 

 the outside is often green and coarse like a Calyx, the 

 inner coloured and delicate ; witness Ornithogalum^ 

 ^. 21, 130 and 499, Nartheciiim, t, 5S5, &c. Lin- 

 naeus has the same idea respecting Daphne^ t. 119 

 and 1381, and the analogy is confirmed by Gnidiay 



* I have lately, in a paper to the Linnaean Society, named this genus 

 Brodiaa in honour of James Brodie, Esq. F.L.S. See Tr. of Linn. 

 Soc. V. 10. 1. 



