COROLLA AND CALYX. 211 



missible ; and yet I cannot conceal a recent discovery 

 which strongly confirms the opinion of my 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 Agapanthus, 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 continued over it, for 

 reasons sufficiently apparent from the former part of this 

 work. 



It is a Linnsean rule that the Stamens should be oppo. 

 site 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 between 

 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 con- 

 clude that in most liliaceous plants, not in c//, the two 

 organs are united into one, and indeed the outside is of- 

 ten s:reen and coarse like a Calvx, the inner coloured and 

 delicate ; witness Ornithogaium, t. 21, 130 and 499, 

 .Yarthecium, t. 535, kc. Linnseus has the same idea 

 respecting Z)«/j/2nc', t. 119 and 1361, and the analogy 

 is confirmed by Gmdia, which is a Daphne with petals. 

 In Troliius, t. 28, and Hellehorus, t. 200 and 613, Lin- 



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

 genus Brodi^a^, in honour of James Broclie, Esq. F. L. S. 



